added type trait extension to operator detection

[SVN r74782]

doc/has_bit_and.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_bit_and has_bit_and]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_bit_and : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs&rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs&rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator&`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs&rhs); // is valid if has_bit_and<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_bit_and.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_bit_and<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_bit_and<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_bit_and<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_bit_and<long>` inherits from `__true_type`.]
+
+[:`has_bit_and<int, int, int>` inherits from `__true_type`.]
+[:`has_bit_and<const int, int>` inherits from `__true_type`.]
+
+[:`has_bit_and<int, double, bool>` inherits from `__false_type`.]
+[:`has_bit_and<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator&` is public or not:
+if `operator&` is defined as a private member of `Lhs` then
+instantiating `has_bit_and<Lhs>` will produce a compiler error.
+For this reason `has_bit_and` cannot be used to determine whether a type has a public `operator&` or not.
+``
+struct A { private: void operator&(const A&); };
+boost::has_bit_and<A>::value; // error: A::operator&(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator&(const A&, const A&);
+struct B { operator A(); };
+boost::has_bit_and<A>::value; // this is fine
+boost::has_bit_and<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_bit_and_assign.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_bit_and_assign has_bit_and_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_bit_and_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs&=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs&=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator&=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs&=rhs); // is valid if has_bit_and_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_bit_and_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_bit_and_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_bit_and_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_bit_and_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_bit_and_assign<long>` inherits from `__true_type`.]
+
+[:`has_bit_and_assign<int, int, int>` inherits from `__true_type`.]
+
+[:`has_bit_and_assign<const int, int>` inherits from `__false_type`.]
+[:`has_bit_and_assign<int, double, bool>` inherits from `__false_type`.]
+[:`has_bit_and_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator&=` is public or not:
+if `operator&=` is defined as a private member of `Lhs` then
+instantiating `has_bit_and_assign<Lhs>` will produce a compiler error.
+For this reason `has_bit_and_assign` cannot be used to determine whether a type has a public `operator&=` or not.
+``
+struct A { private: void operator&=(const A&); };
+boost::has_bit_and_assign<A>::value; // error: A::operator&=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator&=(const A&, const A&);
+struct B { operator A(); };
+boost::has_bit_and_assign<A>::value; // this is fine
+boost::has_bit_and_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_bit_or.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_bit_or has_bit_or]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_bit_or : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs|rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs|rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator|`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs|rhs); // is valid if has_bit_or<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_bit_or.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_bit_or<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_bit_or<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_bit_or<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_bit_or<long>` inherits from `__true_type`.]
+
+[:`has_bit_or<int, int, int>` inherits from `__true_type`.]
+[:`has_bit_or<const int, int>` inherits from `__true_type`.]
+
+[:`has_bit_or<int, double, bool>` inherits from `__false_type`.]
+[:`has_bit_or<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator|` is public or not:
+if `operator|` is defined as a private member of `Lhs` then
+instantiating `has_bit_or<Lhs>` will produce a compiler error.
+For this reason `has_bit_or` cannot be used to determine whether a type has a public `operator|` or not.
+``
+struct A { private: void operator|(const A&); };
+boost::has_bit_or<A>::value; // error: A::operator|(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator|(const A&, const A&);
+struct B { operator A(); };
+boost::has_bit_or<A>::value; // this is fine
+boost::has_bit_or<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_bit_or_assign.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_bit_or_assign has_bit_or_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_bit_or_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs|=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs|=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator|=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs|=rhs); // is valid if has_bit_or_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_bit_or_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_bit_or_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_bit_or_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_bit_or_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_bit_or_assign<long>` inherits from `__true_type`.]
+
+[:`has_bit_or_assign<int, int, int>` inherits from `__true_type`.]
+
+[:`has_bit_or_assign<const int, int>` inherits from `__false_type`.]
+[:`has_bit_or_assign<int, double, bool>` inherits from `__false_type`.]
+[:`has_bit_or_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator|=` is public or not:
+if `operator|=` is defined as a private member of `Lhs` then
+instantiating `has_bit_or_assign<Lhs>` will produce a compiler error.
+For this reason `has_bit_or_assign` cannot be used to determine whether a type has a public `operator|=` or not.
+``
+struct A { private: void operator|=(const A&); };
+boost::has_bit_or_assign<A>::value; // error: A::operator|=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator|=(const A&, const A&);
+struct B { operator A(); };
+boost::has_bit_or_assign<A>::value; // this is fine
+boost::has_bit_or_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_bit_xor.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_bit_xor has_bit_xor]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_bit_xor : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs^rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs^rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator^`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs^rhs); // is valid if has_bit_xor<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_bit_xor.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_bit_xor<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_bit_xor<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_bit_xor<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_bit_xor<long>` inherits from `__true_type`.]
+
+[:`has_bit_xor<int, int, int>` inherits from `__true_type`.]
+[:`has_bit_xor<const int, int>` inherits from `__true_type`.]
+
+[:`has_bit_xor<int, double, bool>` inherits from `__false_type`.]
+[:`has_bit_xor<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator^` is public or not:
+if `operator^` is defined as a private member of `Lhs` then
+instantiating `has_bit_xor<Lhs>` will produce a compiler error.
+For this reason `has_bit_xor` cannot be used to determine whether a type has a public `operator^` or not.
+``
+struct A { private: void operator^(const A&); };
+boost::has_bit_xor<A>::value; // error: A::operator^(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator^(const A&, const A&);
+struct B { operator A(); };
+boost::has_bit_xor<A>::value; // this is fine
+boost::has_bit_xor<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_bit_xor_assign.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_bit_xor_assign has_bit_xor_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_bit_xor_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs^=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs^=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator^=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs^=rhs); // is valid if has_bit_xor_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_bit_xor_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_bit_xor_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_bit_xor_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_bit_xor_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_bit_xor_assign<long>` inherits from `__true_type`.]
+
+[:`has_bit_xor_assign<int, int, int>` inherits from `__true_type`.]
+
+[:`has_bit_xor_assign<const int, int>` inherits from `__false_type`.]
+[:`has_bit_xor_assign<int, double, bool>` inherits from `__false_type`.]
+[:`has_bit_xor_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator^=` is public or not:
+if `operator^=` is defined as a private member of `Lhs` then
+instantiating `has_bit_xor_assign<Lhs>` will produce a compiler error.
+For this reason `has_bit_xor_assign` cannot be used to determine whether a type has a public `operator^=` or not.
+``
+struct A { private: void operator^=(const A&); };
+boost::has_bit_xor_assign<A>::value; // error: A::operator^=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator^=(const A&, const A&);
+struct B { operator A(); };
+boost::has_bit_xor_assign<A>::value; // this is fine
+boost::has_bit_xor_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_complement.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_complement has_complement]
+   template <class Rhs, class Ret=dont_care>
+   struct has_complement : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `~rhs`,
+and (ii) `Ret=dont_care` or the result of expression `~rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator~`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(~rhs); // is valid if has_complement<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_complement.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_complement<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_complement<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_complement<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_complement<long>` inherits from `__true_type`.]
+
+[:`has_complement<int, int>` inherits from `__true_type`.]
+[:`has_complement<int, long>` inherits from `__true_type`.]
+[:`has_complement<const int>` inherits from `__true_type`.]
+
+[:`has_complement<int*>` inherits from `__false_type`.]
+[:`has_complement<double, double>` inherits from `__false_type`.]
+[:`has_complement<double, int>` inherits from `__false_type`.]
+[:`has_complement<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator~` is public or not:
+if `operator~` is defined as a private member of `Rhs` then
+instantiating `has_complement<Rhs>` will produce a compiler error.
+For this reason `has_complement` cannot be used to determine whether a type has a public `operator~` or not.
+``
+struct A { private: void operator~(); };
+boost::has_complement<A>::value; // error: A::operator~() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator~(const A&);
+struct B { operator A(); };
+boost::has_complement<A>::value; // this is fine
+boost::has_complement<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_dereference.qbk

@@ -0,0 +1,76 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_dereference has_dereference]
+   template <class Rhs, class Ret=dont_care>
+   struct has_dereference : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `*rhs`,
+and (ii) `Ret=dont_care` or the result of expression `*rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator*`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(*rhs); // is valid if has_dereference<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_dereference.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_dereference<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_dereference<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_dereference<int*>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_dereference<long*>` inherits from `__true_type`.]
+
+
+[:`has_dereference<int*, int>` inherits from `__true_type`.]
+[:`has_dereference<int*, const int>` inherits from `__true_type`.]
+[:`has_dereference<int const *>` inherits from `__true_type`.]
+[:`has_dereference<int * const>` inherits from `__true_type`.]
+[:`has_dereference<int const * const>` inherits from `__true_type`.]
+
+[:`has_dereference<int>` inherits from `__false_type`.]
+[:`has_dereference<double>` inherits from `__false_type`.]
+[:`has_dereference<void*>` inherits from `__false_type`.]
+[:`has_dereference<const int*, int&>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator*` is public or not:
+if `operator*` is defined as a private member of `Rhs` then
+instantiating `has_dereference<Rhs>` will produce a compiler error.
+For this reason `has_dereference` cannot be used to determine whether a type has a public `operator*` or not.
+``
+struct A { private: void operator*(); };
+boost::has_dereference<A>::value; // error: A::operator*() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator*(const A&);
+struct B { operator A(); };
+boost::has_dereference<A>::value; // this is fine
+boost::has_dereference<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_divides.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_divides has_divides]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_divides : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs/rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs/rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator/`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs/rhs); // is valid if has_divides<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_divides.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_divides<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_divides<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_divides<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_divides<long>` inherits from `__true_type`.]
+
+[:`has_divides<int, int, int>` inherits from `__true_type`.]
+[:`has_divides<int, int, long>` inherits from `__true_type`.]
+[:`has_divides<int, double, double>` inherits from `__true_type`.]
+[:`has_divides<int, double, int>` inherits from `__true_type`.]
+[:`has_divides<const int, int>::value` inherits from `__true_type`.]
+
+[:`has_divides<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator/` is public or not:
+if `operator/` is defined as a private member of `Lhs` then
+instantiating `has_divides<Lhs>` will produce a compiler error.
+For this reason `has_divides` cannot be used to determine whether a type has a public `operator/` or not.
+``
+struct A { private: void operator/(const A&); };
+boost::has_divides<A>::value; // error: A::operator/(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator/(const A&, const A&);
+struct B { operator A(); };
+boost::has_divides<A>::value; // this is fine
+boost::has_divides<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_divides_assign.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_divides_assign has_divides_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_divides_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs/=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs/=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator/=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs/=rhs); // is valid if has_divides_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_divides_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_divides_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_divides_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_divides_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_divides_assign<long>` inherits from `__true_type`.]
+
+[:`has_divides_assign<int, int, int>` inherits from `__true_type`.]
+[:`has_divides_assign<int, int, long>` inherits from `__true_type`.]
+[:`has_divides_assign<int, double, double>` inherits from `__true_type`.]
+[:`has_divides_assign<int, double, int>` inherits from `__true_type`.]
+
+[:`has_divides_assign<const int, int>::value` inherits from `__false_type`.]
+[:`has_divides_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator/=` is public or not:
+if `operator/=` is defined as a private member of `Lhs` then
+instantiating `has_divides_assign<Lhs>` will produce a compiler error.
+For this reason `has_divides_assign` cannot be used to determine whether a type has a public `operator/=` or not.
+``
+struct A { private: void operator/=(const A&); };
+boost::has_divides_assign<A>::value; // error: A::operator/=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator/=(const A&, const A&);
+struct B { operator A(); };
+boost::has_divides_assign<A>::value; // this is fine
+boost::has_divides_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_equal_to.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_equal_to has_equal_to]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_equal_to : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs==rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs==rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator==`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs==rhs); // is valid if has_equal_to<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_equal_to.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_equal_to<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_equal_to<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_equal_to<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_equal_to<long>` inherits from `__true_type`.]
+
+[:`has_equal_to<int, int, bool>` inherits from `__true_type`.]
+[:`has_equal_to<int, double, bool>` inherits from `__true_type`.]
+[:`has_equal_to<const int>` inherits from `__true_type`.]
+
+[:`has_equal_to<int*, int>` inherits from `__false_type`.]
+[:`has_equal_to<int*, double*>` inherits from `__false_type`.]
+[:`has_equal_to<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator==` is public or not:
+if `operator==` is defined as a private member of `Lhs` then
+instantiating `has_equal_to<Lhs>` will produce a compiler error.
+For this reason `has_equal_to` cannot be used to determine whether a type has a public `operator==` or not.
+``
+struct A { private: void operator==(const A&); };
+boost::has_equal_to<A>::value; // error: A::operator==(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator==(const A&, const A&);
+struct B { operator A(); };
+boost::has_equal_to<A>::value; // this is fine
+boost::has_equal_to<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_greater.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_greater has_greater]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_greater : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs>rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs>rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator>`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs>rhs); // is valid if has_greater<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_greater.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_greater<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_greater<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_greater<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_greater<long>` inherits from `__true_type`.]
+
+[:`has_greater<int, int, bool>` inherits from `__true_type`.]
+[:`has_greater<int, double, bool>` inherits from `__true_type`.]
+[:`has_greater<const int>` inherits from `__true_type`.]
+
+[:`has_greater<int*, int>` inherits from `__false_type`.]
+[:`has_greater<int*, double*>` inherits from `__false_type`.]
+[:`has_greater<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator>` is public or not:
+if `operator>` is defined as a private member of `Lhs` then
+instantiating `has_greater<Lhs>` will produce a compiler error.
+For this reason `has_greater` cannot be used to determine whether a type has a public `operator>` or not.
+``
+struct A { private: void operator>(const A&); };
+boost::has_greater<A>::value; // error: A::operator>(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator>(const A&, const A&);
+struct B { operator A(); };
+boost::has_greater<A>::value; // this is fine
+boost::has_greater<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_greater_equal.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_greater_equal has_greater_equal]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_greater_equal : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs>=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs>=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator>=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs>=rhs); // is valid if has_greater_equal<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_greater_equal.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_greater_equal<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_greater_equal<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_greater_equal<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_greater_equal<long>` inherits from `__true_type`.]
+
+[:`has_greater_equal<int, int, bool>` inherits from `__true_type`.]
+[:`has_greater_equal<int, double, bool>` inherits from `__true_type`.]
+[:`has_greater_equal<const int>` inherits from `__true_type`.]
+
+[:`has_greater_equal<int*, int>` inherits from `__false_type`.]
+[:`has_greater_equal<int*, double*>` inherits from `__false_type`.]
+[:`has_greater_equal<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator>=` is public or not:
+if `operator>=` is defined as a private member of `Lhs` then
+instantiating `has_greater_equal<Lhs>` will produce a compiler error.
+For this reason `has_greater_equal` cannot be used to determine whether a type has a public `operator>=` or not.
+``
+struct A { private: void operator>=(const A&); };
+boost::has_greater_equal<A>::value; // error: A::operator>=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator>=(const A&, const A&);
+struct B { operator A(); };
+boost::has_greater_equal<A>::value; // this is fine
+boost::has_greater_equal<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_left_shift.qbk

@@ -0,0 +1,74 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_left_shift has_left_shift]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_left_shift : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs<<rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs<<rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator<<`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs<<rhs); // is valid if has_left_shift<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_left_shift.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_left_shift<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_left_shift<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_left_shift<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_left_shift<long>` inherits from `__true_type`.]
+
+[:`has_left_shift<int, int, int>` inherits from `__true_type`.]
+[:`has_left_shift<const int, int>` inherits from `__true_type`.]
+[:`has_left_shift<std::ostream, int>` inherits from `__true_type`.]
+[:`has_left_shift<std::ostream, char*, std::ostream>` inherits from `__true_type`.]
+[:`has_left_shift<std::ostream, std::string>` inherits from `__true_type`.]
+
+[:`has_left_shift<int, double, bool>` inherits from `__false_type`.]
+[:`has_left_shift<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator<<` is public or not:
+if `operator<<` is defined as a private member of `Lhs` then
+instantiating `has_left_shift<Lhs>` will produce a compiler error.
+For this reason `has_left_shift` cannot be used to determine whether a type has a public `operator<<` or not.
+``
+struct A { private: void operator<<(const A&); };
+boost::has_left_shift<A>::value; // error: A::operator<<(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator<<(const A&, const A&);
+struct B { operator A(); };
+boost::has_left_shift<A>::value; // this is fine
+boost::has_left_shift<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_left_shift_assign.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_left_shift_assign has_left_shift_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_left_shift_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs<<=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs<<=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator<<=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs<<=rhs); // is valid if has_left_shift_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_left_shift_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_left_shift_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_left_shift_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_left_shift_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_left_shift_assign<long>` inherits from `__true_type`.]
+
+[:`has_left_shift_assign<int, int, int>` inherits from `__true_type`.]
+
+[:`has_left_shift_assign<const int, int>` inherits from `__false_type`.]
+[:`has_left_shift_assign<int, double, bool>` inherits from `__false_type`.]
+[:`has_left_shift_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator<<=` is public or not:
+if `operator<<=` is defined as a private member of `Lhs` then
+instantiating `has_left_shift_assign<Lhs>` will produce a compiler error.
+For this reason `has_left_shift_assign` cannot be used to determine whether a type has a public `operator<<=` or not.
+``
+struct A { private: void operator<<=(const A&); };
+boost::has_left_shift_assign<A>::value; // error: A::operator<<=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator<<=(const A&, const A&);
+struct B { operator A(); };
+boost::has_left_shift_assign<A>::value; // this is fine
+boost::has_left_shift_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_less.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_less has_less]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_less : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs<rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs<rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator<`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs<rhs); // is valid if has_less<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_less.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_less<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_less<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_less<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_less<long>` inherits from `__true_type`.]
+
+[:`has_less<int, int, bool>` inherits from `__true_type`.]
+[:`has_less<int, double, bool>` inherits from `__true_type`.]
+[:`has_less<const int>` inherits from `__true_type`.]
+
+[:`has_less<int*, int>` inherits from `__false_type`.]
+[:`has_less<int*, double*>` inherits from `__false_type`.]
+[:`has_less<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator<` is public or not:
+if `operator<` is defined as a private member of `Lhs` then
+instantiating `has_less<Lhs>` will produce a compiler error.
+For this reason `has_less` cannot be used to determine whether a type has a public `operator<` or not.
+``
+struct A { private: void operator<(const A&); };
+boost::has_less<A>::value; // error: A::operator<(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator<(const A&, const A&);
+struct B { operator A(); };
+boost::has_less<A>::value; // this is fine
+boost::has_less<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_less_equal.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_less_equal has_less_equal]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_less_equal : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs<=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs<=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator<=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs<=rhs); // is valid if has_less_equal<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_less_equal.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_less_equal<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_less_equal<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_less_equal<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_less_equal<long>` inherits from `__true_type`.]
+
+[:`has_less_equal<int, int, bool>` inherits from `__true_type`.]
+[:`has_less_equal<int, double, bool>` inherits from `__true_type`.]
+[:`has_less_equal<const int>` inherits from `__true_type`.]
+
+[:`has_less_equal<int*, int>` inherits from `__false_type`.]
+[:`has_less_equal<int*, double*>` inherits from `__false_type`.]
+[:`has_less_equal<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator<=` is public or not:
+if `operator<=` is defined as a private member of `Lhs` then
+instantiating `has_less_equal<Lhs>` will produce a compiler error.
+For this reason `has_less_equal` cannot be used to determine whether a type has a public `operator<=` or not.
+``
+struct A { private: void operator<=(const A&); };
+boost::has_less_equal<A>::value; // error: A::operator<=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator<=(const A&, const A&);
+struct B { operator A(); };
+boost::has_less_equal<A>::value; // this is fine
+boost::has_less_equal<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_logical_and.qbk

@@ -0,0 +1,72 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_logical_and has_logical_and]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_logical_and : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs&&rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs&&rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator&&`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs&&rhs); // is valid if has_logical_and<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_logical_and.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_logical_and<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_logical_and<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_logical_and<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_logical_and<bool>` inherits from `__true_type`.]
+
+[:`has_logical_and<int, int, bool>` inherits from `__true_type`.]
+[:`has_logical_and<int, int, long>` inherits from `__true_type`.]
+[:`has_logical_and<int, double, bool>` inherits from `__true_type`.]
+[:`has_logical_and<const int, int>::value` inherits from `__true_type`.]
+
+[:`has_logical_and<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator&&` is public or not:
+if `operator&&` is defined as a private member of `Lhs` then
+instantiating `has_logical_and<Lhs>` will produce a compiler error.
+For this reason `has_logical_and` cannot be used to determine whether a type has a public `operator&&` or not.
+``
+struct A { private: void operator&&(const A&); };
+boost::has_logical_and<A>::value; // error: A::operator&&(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator&&(const A&, const A&);
+struct B { operator A(); };
+boost::has_logical_and<A>::value; // this is fine
+boost::has_logical_and<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_logical_not.qbk

@@ -0,0 +1,72 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_logical_not has_logical_not]
+   template <class Rhs, class Ret=dont_care>
+   struct has_logical_not : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `!rhs`,
+and (ii) `Ret=dont_care` or the result of expression `!rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator!`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(!rhs); // is valid if has_logical_not<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_logical_not.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_logical_not<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_logical_not<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_logical_not<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_logical_not<bool>` inherits from `__true_type`.]
+
+[:`has_logical_not<int, bool>` inherits from `__true_type`.]
+[:`has_logical_not<int, long>` inherits from `__true_type`.]
+[:`has_logical_not<double, double>` inherits from `__true_type`.]
+[:`has_logical_not<double, bool>` inherits from `__true_type`.]
+[:`has_logical_not<const bool>` inherits from `__true_type`.]
+
+[:`has_logical_not<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator!` is public or not:
+if `operator!` is defined as a private member of `Rhs` then
+instantiating `has_logical_not<Rhs>` will produce a compiler error.
+For this reason `has_logical_not` cannot be used to determine whether a type has a public `operator!` or not.
+``
+struct A { private: void operator!(); };
+boost::has_logical_not<A>::value; // error: A::operator!() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator!(const A&);
+struct B { operator A(); };
+boost::has_logical_not<A>::value; // this is fine
+boost::has_logical_not<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_logical_or.qbk

@@ -0,0 +1,72 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_logical_or has_logical_or]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_logical_or : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs||rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs||rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator||`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs||rhs); // is valid if has_logical_or<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_logical_or.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_logical_or<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_logical_or<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_logical_or<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_logical_or<bool>` inherits from `__true_type`.]
+
+[:`has_logical_or<int, int, bool>` inherits from `__true_type`.]
+[:`has_logical_or<int, int, long>` inherits from `__true_type`.]
+[:`has_logical_or<int, double, bool>` inherits from `__true_type`.]
+[:`has_logical_or<const int, int>::value` inherits from `__true_type`.]
+
+[:`has_logical_or<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator||` is public or not:
+if `operator||` is defined as a private member of `Lhs` then
+instantiating `has_logical_or<Lhs>` will produce a compiler error.
+For this reason `has_logical_or` cannot be used to determine whether a type has a public `operator||` or not.
+``
+struct A { private: void operator||(const A&); };
+boost::has_logical_or<A>::value; // error: A::operator||(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator||(const A&, const A&);
+struct B { operator A(); };
+boost::has_logical_or<A>::value; // this is fine
+boost::has_logical_or<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_minus.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_minus has_minus]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_minus : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs-rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs-rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator-`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs-rhs); // is valid if has_minus<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_minus.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_minus<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_minus<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_minus<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_minus<long>` inherits from `__true_type`.]
+
+[:`has_minus<int, int, int>` inherits from `__true_type`.]
+[:`has_minus<int, int, long>` inherits from `__true_type`.]
+[:`has_minus<int, double, double>` inherits from `__true_type`.]
+[:`has_minus<int, double, int>` inherits from `__true_type`.]
+[:`has_minus<const int, int>::value` inherits from `__true_type`.]
+
+[:`has_minus<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator-` is public or not:
+if `operator-` is defined as a private member of `Lhs` then
+instantiating `has_minus<Lhs>` will produce a compiler error.
+For this reason `has_minus` cannot be used to determine whether a type has a public `operator-` or not.
+``
+struct A { private: void operator-(const A&); };
+boost::has_minus<A>::value; // error: A::operator-(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator-(const A&, const A&);
+struct B { operator A(); };
+boost::has_minus<A>::value; // this is fine
+boost::has_minus<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_minus_assign.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_minus_assign has_minus_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_minus_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs-=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs-=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator-=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs-=rhs); // is valid if has_minus_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_minus_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_minus_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_minus_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_minus_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_minus_assign<long>` inherits from `__true_type`.]
+
+[:`has_minus_assign<int, int, int>` inherits from `__true_type`.]
+[:`has_minus_assign<int, int, long>` inherits from `__true_type`.]
+[:`has_minus_assign<int, double, double>` inherits from `__true_type`.]
+[:`has_minus_assign<int, double, int>` inherits from `__true_type`.]
+
+[:`has_minus_assign<const int, int>::value` inherits from `__false_type`.]
+[:`has_minus_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator-=` is public or not:
+if `operator-=` is defined as a private member of `Lhs` then
+instantiating `has_minus_assign<Lhs>` will produce a compiler error.
+For this reason `has_minus_assign` cannot be used to determine whether a type has a public `operator-=` or not.
+``
+struct A { private: void operator-=(const A&); };
+boost::has_minus_assign<A>::value; // error: A::operator-=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator-=(const A&, const A&);
+struct B { operator A(); };
+boost::has_minus_assign<A>::value; // this is fine
+boost::has_minus_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_modulus.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_modulus has_modulus]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_modulus : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs%rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs%rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator%`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs%rhs); // is valid if has_modulus<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_modulus.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_modulus<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_modulus<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_modulus<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_modulus<long>` inherits from `__true_type`.]
+
+[:`has_modulus<int, int, int>` inherits from `__true_type`.]
+[:`has_modulus<int, int, long>` inherits from `__true_type`.]
+[:`has_modulus<const int, int>::value` inherits from `__true_type`.]
+
+[:`has_modulus<int, double>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator%` is public or not:
+if `operator%` is defined as a private member of `Lhs` then
+instantiating `has_modulus<Lhs>` will produce a compiler error.
+For this reason `has_modulus` cannot be used to determine whether a type has a public `operator%` or not.
+``
+struct A { private: void operator%(const A&); };
+boost::has_modulus<A>::value; // error: A::operator%(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator%(const A&, const A&);
+struct B { operator A(); };
+boost::has_modulus<A>::value; // this is fine
+boost::has_modulus<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_modulus_assign.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_modulus_assign has_modulus_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_modulus_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs%=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs%=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator%=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs%=rhs); // is valid if has_modulus_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_modulus_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_modulus_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_modulus_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_modulus_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_modulus_assign<long>` inherits from `__true_type`.]
+
+[:`has_modulus_assign<int, int, int>` inherits from `__true_type`.]
+[:`has_modulus_assign<int, int, long>` inherits from `__true_type`.]
+
+[:`has_modulus_assign<const int, int>::value` inherits from `__false_type`.]
+[:`has_modulus_assign<int, double>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator%=` is public or not:
+if `operator%=` is defined as a private member of `Lhs` then
+instantiating `has_modulus_assign<Lhs>` will produce a compiler error.
+For this reason `has_modulus_assign` cannot be used to determine whether a type has a public `operator%=` or not.
+``
+struct A { private: void operator%=(const A&); };
+boost::has_modulus_assign<A>::value; // error: A::operator%=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator%=(const A&, const A&);
+struct B { operator A(); };
+boost::has_modulus_assign<A>::value; // this is fine
+boost::has_modulus_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_multiplies.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_multiplies has_multiplies]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_multiplies : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs*rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs*rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator*`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs*rhs); // is valid if has_multiplies<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_multiplies.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_multiplies<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_multiplies<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_multiplies<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_multiplies<long>` inherits from `__true_type`.]
+
+[:`has_multiplies<int, int, int>` inherits from `__true_type`.]
+[:`has_multiplies<int, int, long>` inherits from `__true_type`.]
+[:`has_multiplies<int, double, double>` inherits from `__true_type`.]
+[:`has_multiplies<int, double, int>` inherits from `__true_type`.]
+[:`has_multiplies<const int, int>::value` inherits from `__true_type`.]
+
+[:`has_multiplies<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator*` is public or not:
+if `operator*` is defined as a private member of `Lhs` then
+instantiating `has_multiplies<Lhs>` will produce a compiler error.
+For this reason `has_multiplies` cannot be used to determine whether a type has a public `operator*` or not.
+``
+struct A { private: void operator*(const A&); };
+boost::has_multiplies<A>::value; // error: A::operator*(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator*(const A&, const A&);
+struct B { operator A(); };
+boost::has_multiplies<A>::value; // this is fine
+boost::has_multiplies<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_multiplies_assign.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_multiplies_assign has_multiplies_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_multiplies_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs*=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs*=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator*=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs*=rhs); // is valid if has_multiplies_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_multiplies_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_multiplies_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_multiplies_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_multiplies_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_multiplies_assign<long>` inherits from `__true_type`.]
+
+[:`has_multiplies_assign<int, int, int>` inherits from `__true_type`.]
+[:`has_multiplies_assign<int, int, long>` inherits from `__true_type`.]
+[:`has_multiplies_assign<int, double, double>` inherits from `__true_type`.]
+[:`has_multiplies_assign<int, double, int>` inherits from `__true_type`.]
+
+[:`has_multiplies_assign<const int, int>::value` inherits from `__false_type`.]
+[:`has_multiplies_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator*=` is public or not:
+if `operator*=` is defined as a private member of `Lhs` then
+instantiating `has_multiplies_assign<Lhs>` will produce a compiler error.
+For this reason `has_multiplies_assign` cannot be used to determine whether a type has a public `operator*=` or not.
+``
+struct A { private: void operator*=(const A&); };
+boost::has_multiplies_assign<A>::value; // error: A::operator*=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator*=(const A&, const A&);
+struct B { operator A(); };
+boost::has_multiplies_assign<A>::value; // this is fine
+boost::has_multiplies_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_negate.qbk

@@ -0,0 +1,72 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_negate has_negate]
+   template <class Rhs, class Ret=dont_care>
+   struct has_negate : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `-rhs`,
+and (ii) `Ret=dont_care` or the result of expression `-rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator-`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(-rhs); // is valid if has_negate<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_negate.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_negate<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_negate<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_negate<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_negate<long>` inherits from `__true_type`.]
+
+[:`has_negate<int, int>` inherits from `__true_type`.]
+[:`has_negate<int, long>` inherits from `__true_type`.]
+[:`has_negate<double, double>` inherits from `__true_type`.]
+[:`has_negate<double, int>` inherits from `__true_type`.]
+[:`has_negate<const int>` inherits from `__true_type`.]
+
+[:`has_negate<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator-` is public or not:
+if `operator-` is defined as a private member of `Rhs` then
+instantiating `has_negate<Rhs>` will produce a compiler error.
+For this reason `has_negate` cannot be used to determine whether a type has a public `operator-` or not.
+``
+struct A { private: void operator-(); };
+boost::has_negate<A>::value; // error: A::operator-() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator-(const A&);
+struct B { operator A(); };
+boost::has_negate<A>::value; // this is fine
+boost::has_negate<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_not_equal_to.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_not_equal_to has_not_equal_to]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_not_equal_to : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs!=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs!=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator!=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs!=rhs); // is valid if has_not_equal_to<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_not_equal_to.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_not_equal_to<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_not_equal_to<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_not_equal_to<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_not_equal_to<long>` inherits from `__true_type`.]
+
+[:`has_not_equal_to<int, int, bool>` inherits from `__true_type`.]
+[:`has_not_equal_to<int, double, bool>` inherits from `__true_type`.]
+[:`has_not_equal_to<const int>` inherits from `__true_type`.]
+
+[:`has_not_equal_to<int*, int>` inherits from `__false_type`.]
+[:`has_not_equal_to<int*, double*>` inherits from `__false_type`.]
+[:`has_not_equal_to<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator!=` is public or not:
+if `operator!=` is defined as a private member of `Lhs` then
+instantiating `has_not_equal_to<Lhs>` will produce a compiler error.
+For this reason `has_not_equal_to` cannot be used to determine whether a type has a public `operator!=` or not.
+``
+struct A { private: void operator!=(const A&); };
+boost::has_not_equal_to<A>::value; // error: A::operator!=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator!=(const A&, const A&);
+struct B { operator A(); };
+boost::has_not_equal_to<A>::value; // this is fine
+boost::has_not_equal_to<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_plus.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_plus has_plus]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_plus : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs+rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs+rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator+`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs+rhs); // is valid if has_plus<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_plus.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_plus<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_plus<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_plus<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_plus<long>` inherits from `__true_type`.]
+
+[:`has_plus<int, int, int>` inherits from `__true_type`.]
+[:`has_plus<int, int, long>` inherits from `__true_type`.]
+[:`has_plus<int, double, double>` inherits from `__true_type`.]
+[:`has_plus<int, double, int>` inherits from `__true_type`.]
+[:`has_plus<const int, int>::value` inherits from `__true_type`.]
+
+[:`has_plus<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator+` is public or not:
+if `operator+` is defined as a private member of `Lhs` then
+instantiating `has_plus<Lhs>` will produce a compiler error.
+For this reason `has_plus` cannot be used to determine whether a type has a public `operator+` or not.
+``
+struct A { private: void operator+(const A&); };
+boost::has_plus<A>::value; // error: A::operator+(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator+(const A&, const A&);
+struct B { operator A(); };
+boost::has_plus<A>::value; // this is fine
+boost::has_plus<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_plus_assign.qbk

@@ -0,0 +1,73 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_plus_assign has_plus_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_plus_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs+=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs+=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator+=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs+=rhs); // is valid if has_plus_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_plus_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_plus_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_plus_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_plus_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_plus_assign<long>` inherits from `__true_type`.]
+
+[:`has_plus_assign<int, int, int>` inherits from `__true_type`.]
+[:`has_plus_assign<int, int, long>` inherits from `__true_type`.]
+[:`has_plus_assign<int, double, double>` inherits from `__true_type`.]
+[:`has_plus_assign<int, double, int>` inherits from `__true_type`.]
+
+[:`has_plus_assign<const int, int>::value` inherits from `__false_type`.]
+[:`has_plus_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator+=` is public or not:
+if `operator+=` is defined as a private member of `Lhs` then
+instantiating `has_plus_assign<Lhs>` will produce a compiler error.
+For this reason `has_plus_assign` cannot be used to determine whether a type has a public `operator+=` or not.
+``
+struct A { private: void operator+=(const A&); };
+boost::has_plus_assign<A>::value; // error: A::operator+=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator+=(const A&, const A&);
+struct B { operator A(); };
+boost::has_plus_assign<A>::value; // this is fine
+boost::has_plus_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_post_decrement.qbk

@@ -0,0 +1,74 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_post_decrement has_post_decrement]
+   template <class Lhs, class Ret=dont_care>
+   struct has_post_decrement : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` can be used in expression `lhs--`,
+and (ii) `Ret=dont_care` or the result of expression `lhs--` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of postfix `operator--`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+f(lhs--); // is valid if has_post_decrement<Lhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_post_decrement.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_post_decrement<Lhs, Ret>::value_type` is the type `bool`.]
+[:`has_post_decrement<Lhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_post_decrement<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_post_decrement<long>` inherits from `__true_type`.]
+
+[:`has_post_decrement<int, int>` inherits from `__true_type`.]
+[:`has_post_decrement<int, long>` inherits from `__true_type`.]
+[:`has_post_decrement<double, double>` inherits from `__true_type`.]
+[:`has_post_decrement<double, int>` inherits from `__true_type`.]
+
+[:`has_post_decrement<bool>` inherits from `__false_type`.]
+[:`has_post_decrement<const int>` inherits from `__false_type`.]
+[:`has_post_decrement<void*>` inherits from `__false_type`.]
+[:`has_post_decrement<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether postfix `operator--` is public or not:
+if `operator--` is defined as a private member of `Lhs` then
+instantiating `has_post_decrement<Lhs>` will produce a compiler error.
+For this reason `has_post_decrement` cannot be used to determine whether a type has a public `operator--` or not.
+``
+struct A { private: void operator--(int); };
+boost::has_post_decrement<A>::value; // error: A::operator--(int) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator--(const A&, int);
+struct B { operator A(); };
+boost::has_post_decrement<A>::value; // this is fine
+boost::has_post_decrement<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_post_increment.qbk

@@ -0,0 +1,74 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_post_increment has_post_increment]
+   template <class Lhs, class Ret=dont_care>
+   struct has_post_increment : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` can be used in expression `lhs++`,
+and (ii) `Ret=dont_care` or the result of expression `lhs++` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of postfix `operator++`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+f(lhs++); // is valid if has_post_increment<Lhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_post_increment.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_post_increment<Lhs, Ret>::value_type` is the type `bool`.]
+[:`has_post_increment<Lhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_post_increment<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_post_increment<long>` inherits from `__true_type`.]
+
+[:`has_post_increment<int, int>` inherits from `__true_type`.]
+[:`has_post_increment<int, long>` inherits from `__true_type`.]
+[:`has_post_increment<double, double>` inherits from `__true_type`.]
+[:`has_post_increment<double, int>` inherits from `__true_type`.]
+[:`has_post_increment<bool>` inherits from `__true_type`.]
+
+[:`has_post_increment<const int>` inherits from `__false_type`.]
+[:`has_post_increment<void*>` inherits from `__false_type`.]
+[:`has_post_increment<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether postfix `operator++` is public or not:
+if `operator++` is defined as a private member of `Lhs` then
+instantiating `has_post_increment<Lhs>` will produce a compiler error.
+For this reason `has_post_increment` cannot be used to determine whether a type has a public `operator++` or not.
+``
+struct A { private: void operator++(int); };
+boost::has_post_increment<A>::value; // error: A::operator++(int) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator++(const A&, int);
+struct B { operator A(); };
+boost::has_post_increment<A>::value; // this is fine
+boost::has_post_increment<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_pre_decrement.qbk

@@ -0,0 +1,74 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_pre_decrement has_pre_decrement]
+   template <class Rhs, class Ret=dont_care>
+   struct has_pre_decrement : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `--rhs`,
+and (ii) `Ret=dont_care` or the result of expression `--rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator--`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(--rhs); // is valid if has_pre_decrement<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_pre_decrement.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_pre_decrement<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_pre_decrement<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_pre_decrement<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_pre_decrement<long>` inherits from `__true_type`.]
+
+[:`has_pre_decrement<int, int>` inherits from `__true_type`.]
+[:`has_pre_decrement<int, long>` inherits from `__true_type`.]
+[:`has_pre_decrement<double, double>` inherits from `__true_type`.]
+[:`has_pre_decrement<double, int>` inherits from `__true_type`.]
+
+[:`has_pre_decrement<bool>` inherits from `__false_type`.]
+[:`has_pre_decrement<const int>` inherits from `__false_type`.]
+[:`has_pre_decrement<void*>` inherits from `__false_type`.]
+[:`has_pre_decrement<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator--` is public or not:
+if `operator--` is defined as a private member of `Rhs` then
+instantiating `has_pre_decrement<Rhs>` will produce a compiler error.
+For this reason `has_pre_decrement` cannot be used to determine whether a type has a public `operator--` or not.
+``
+struct A { private: void operator--(); };
+boost::has_pre_decrement<A>::value; // error: A::operator--() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator--(const A&);
+struct B { operator A(); };
+boost::has_pre_decrement<A>::value; // this is fine
+boost::has_pre_decrement<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_pre_increment.qbk

@@ -0,0 +1,74 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_pre_increment has_pre_increment]
+   template <class Rhs, class Ret=dont_care>
+   struct has_pre_increment : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `++rhs`,
+and (ii) `Ret=dont_care` or the result of expression `++rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator++`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(++rhs); // is valid if has_pre_increment<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_pre_increment.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_pre_increment<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_pre_increment<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_pre_increment<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_pre_increment<long>` inherits from `__true_type`.]
+
+[:`has_pre_increment<int, int>` inherits from `__true_type`.]
+[:`has_pre_increment<int, long>` inherits from `__true_type`.]
+[:`has_pre_increment<double, double>` inherits from `__true_type`.]
+[:`has_pre_increment<double, int>` inherits from `__true_type`.]
+[:`has_pre_increment<bool>` inherits from `__true_type`.]
+
+[:`has_pre_increment<const int>` inherits from `__false_type`.]
+[:`has_pre_increment<void*>` inherits from `__false_type`.]
+[:`has_pre_increment<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator++` is public or not:
+if `operator++` is defined as a private member of `Rhs` then
+instantiating `has_pre_increment<Rhs>` will produce a compiler error.
+For this reason `has_pre_increment` cannot be used to determine whether a type has a public `operator++` or not.
+``
+struct A { private: void operator++(); };
+boost::has_pre_increment<A>::value; // error: A::operator++() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator++(const A&);
+struct B { operator A(); };
+boost::has_pre_increment<A>::value; // this is fine
+boost::has_pre_increment<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_right_shift.qbk

@@ -0,0 +1,74 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_right_shift has_right_shift]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_right_shift : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs>>rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs>>rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator>>`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs>>rhs); // is valid if has_right_shift<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_right_shift.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_right_shift<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_right_shift<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_right_shift<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_right_shift<long>` inherits from `__true_type`.]
+
+[:`has_right_shift<int, int, int>` inherits from `__true_type`.]
+[:`has_right_shift<const int, int>` inherits from `__true_type`.]
+[:`has_right_shift<std::istream, int&>` inherits from `__true_type`.]
+[:`has_right_shift<std::istream, char*, std::ostream>` inherits from `__true_type`.]
+[:`has_right_shift<std::istream, std::string&>` inherits from `__true_type`.]
+
+[:`has_right_shift<int, double, bool>` inherits from `__false_type`.]
+[:`has_right_shift<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator>>` is public or not:
+if `operator>>` is defined as a private member of `Lhs` then
+instantiating `has_right_shift<Lhs>` will produce a compiler error.
+For this reason `has_right_shift` cannot be used to determine whether a type has a public `operator>>` or not.
+``
+struct A { private: void operator>>(const A&); };
+boost::has_right_shift<A>::value; // error: A::operator>>(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator>>(const A&, const A&);
+struct B { operator A(); };
+boost::has_right_shift<A>::value; // this is fine
+boost::has_right_shift<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_right_shift_assign.qbk

@@ -0,0 +1,71 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_right_shift_assign has_right_shift_assign]
+   template <class Lhs, class Rhs=Lhs, class Ret=dont_care>
+   struct has_right_shift_assign : public __tof {};
+
+__inherit
+If (i) `lhs` of type `Lhs` and `rhs` of type `Rhs` can be used in expression `lhs>>=rhs`,
+and (ii) `Ret=dont_care` or the result of expression `lhs>>=rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of binary `operator>>=`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Lhs lhs;
+Rhs rhs;
+f(lhs>>=rhs); // is valid if has_right_shift_assign<Lhs, Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_right_shift_assign.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_right_shift_assign<Lhs, Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_right_shift_assign<Lhs, Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_right_shift_assign<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_right_shift_assign<long>` inherits from `__true_type`.]
+
+[:`has_right_shift_assign<int, int, int>` inherits from `__true_type`.]
+
+[:`has_right_shift_assign<const int, int>` inherits from `__false_type`.]
+[:`has_right_shift_assign<int, double, bool>` inherits from `__false_type`.]
+[:`has_right_shift_assign<int, int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether binary `operator>>=` is public or not:
+if `operator>>=` is defined as a private member of `Lhs` then
+instantiating `has_right_shift_assign<Lhs>` will produce a compiler error.
+For this reason `has_right_shift_assign` cannot be used to determine whether a type has a public `operator>>=` or not.
+``
+struct A { private: void operator>>=(const A&); };
+boost::has_right_shift_assign<A>::value; // error: A::operator>>=(const A&) is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator>>=(const A&, const A&);
+struct B { operator A(); };
+boost::has_right_shift_assign<A>::value; // this is fine
+boost::has_right_shift_assign<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_unary_minus.qbk

@@ -0,0 +1,72 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_unary_minus has_unary_minus]
+   template <class Rhs, class Ret=dont_care>
+   struct has_unary_minus : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `-rhs`,
+and (ii) `Ret=dont_care` or the result of expression `-rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator-`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(-rhs); // is valid if has_unary_minus<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_unary_minus.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_unary_minus<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_unary_minus<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_unary_minus<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_unary_minus<long>` inherits from `__true_type`.]
+
+[:`has_unary_minus<int, int>` inherits from `__true_type`.]
+[:`has_unary_minus<int, long>` inherits from `__true_type`.]
+[:`has_unary_minus<double, double>` inherits from `__true_type`.]
+[:`has_unary_minus<double, int>` inherits from `__true_type`.]
+[:`has_unary_minus<const int>` inherits from `__true_type`.]
+
+[:`has_unary_minus<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator-` is public or not:
+if `operator-` is defined as a private member of `Rhs` then
+instantiating `has_unary_minus<Rhs>` will produce a compiler error.
+For this reason `has_unary_minus` cannot be used to determine whether a type has a public `operator-` or not.
+``
+struct A { private: void operator-(); };
+boost::has_unary_minus<A>::value; // error: A::operator-() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator-(const A&);
+struct B { operator A(); };
+boost::has_unary_minus<A>::value; // this is fine
+boost::has_unary_minus<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/has_unary_plus.qbk

@@ -0,0 +1,72 @@
+[/
+  (C) Copyright 2009-2011  Frederic Bron.
+  Distributed under the Boost Software License, Version 1.0.
+  (See accompanying file LICENSE_1_0.txt or copy at
+  http://www.boost.org/LICENSE_1_0.txt).
+]
+
+[section:has_unary_plus has_unary_plus]
+   template <class Rhs, class Ret=dont_care>
+   struct has_unary_plus : public __tof {};
+
+__inherit
+If (i) `rhs` of type `Rhs` can be used in expression `+rhs`,
+and (ii) `Ret=dont_care` or the result of expression `+rhs` is convertible to `Ret`
+then inherits from __true_type,
+otherwise inherits from __false_type.
+
+The default behaviour (`Ret=dont_care`) is to not check for the return value of prefix `operator+`.
+If `Ret` is different from the default `dont_care` type, the return value is checked to be convertible to `Ret`.
+Convertible to `Ret` means that the return value of the operator can be used as argument to a function expecting `Ret`:
+``
+void f(Ret);
+Rhs rhs;
+f(+rhs); // is valid if has_unary_plus<Rhs, Ret>::value==true
+``
+If `Ret=void`, the return type is checked to be exactly `void`.
+
+__header `#include <boost/type_traits/has_unary_plus.hpp>` or `#include <boost/type_traits/has_operator.hpp>`
+
+__examples
+
+[:`has_unary_plus<Rhs, Ret>::value_type` is the type `bool`.]
+[:`has_unary_plus<Rhs, Ret>::value` is a `bool` integral constant expression.]
+[:`has_unary_plus<int>::value` is a `bool` integral constant expression that evaluates to `true`.]
+[:`has_unary_plus<long>` inherits from `__true_type`.]
+
+[:`has_unary_plus<int, int>` inherits from `__true_type`.]
+[:`has_unary_plus<int, long>` inherits from `__true_type`.]
+[:`has_unary_plus<double, double>` inherits from `__true_type`.]
+[:`has_unary_plus<double, int>` inherits from `__true_type`.]
+[:`has_unary_plus<const int>` inherits from `__true_type`.]
+
+[:`has_unary_plus<int, std::string>` inherits from `__false_type`.]
+
+
+[*See also:] [link boost_typetraits.category.value_traits.operators Operator Type Traits]
+
+[*Known issues:]
+
+* This trait cannot detect whether prefix `operator+` is public or not:
+if `operator+` is defined as a private member of `Rhs` then
+instantiating `has_unary_plus<Rhs>` will produce a compiler error.
+For this reason `has_unary_plus` cannot be used to determine whether a type has a public `operator+` or not.
+``
+struct A { private: void operator+(); };
+boost::has_unary_plus<A>::value; // error: A::operator+() is private
+``
+
+* There is an issue if the operator exists only for type `A` and `B` is
+convertible to `A`. In this case, the compiler will report an ambiguous overload.
+``
+struct A { };
+void operator+(const A&);
+struct B { operator A(); };
+boost::has_unary_plus<A>::value; // this is fine
+boost::has_unary_plus<B>::value; // error: ambiguous overload
+``
+
+* `volatile` qualifier is not properly handled and would lead to undefined behavior
+
+[endsect]
+

doc/html/boost_typetraits/background.html

@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title>Background and Tutorial</title>
 <link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -669,10 +669,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/category.html

@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title>Type Traits by Category</title>
 <link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -36,6 +36,8 @@
         Type Properties</a></span></dt>
 <dt><span class="section"><a href="category/value_traits/relate.html">Relationships
         Between Two Types</a></span></dt>
+<dt><span class="section"><a href="category/value_traits/operators.html">Operator
+        Type Traits</a></span></dt>
 </dl></dd>
 <dt><span class="section"><a href="category/transform.html">Type Traits that
       Transform One Type to Another</a></span></dt>
@@ -47,10 +49,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/category/alignment.html

@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title>Synthesizing Types with Specific Alignments</title>
 <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -45,10 +45,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/category/function.html

@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title>Decomposing Function Types</title>
 <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -42,10 +42,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/category/transform.html

@@ -3,10 +3,10 @@
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 <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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-<link rel="prev" href="value_traits/relate.html" title="Relationships Between Two Types">
+<link rel="prev" href="value_traits/operators.html" title="Operator Type Traits">
 <link rel="next" href="alignment.html" title="Synthesizing Types with Specific Alignments">
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 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
@@ -20,7 +20,7 @@
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 <hr>
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-<a accesskey="p" href="value_traits/relate.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../category.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="alignment.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="value_traits/operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../category.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="alignment.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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@@ -161,10 +161,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
@@ -172,7 +173,7 @@
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 <hr>
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+<a accesskey="p" href="value_traits/operators.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../category.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="alignment.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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doc/html/boost_typetraits/category/value_traits.html

@@ -3,7 +3,7 @@
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 <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -34,6 +34,8 @@
         Type Properties</a></span></dt>
 <dt><span class="section"><a href="value_traits/relate.html">Relationships
         Between Two Types</a></span></dt>
+<dt><span class="section"><a href="value_traits/operators.html">Operator
+        Type Traits</a></span></dt>
 </dl></div>
 <p>
         These traits are all <span class="emphasis"><em>value traits</em></span>, which is to say the
@@ -48,10 +50,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/category/value_traits/primary.html

@@ -3,7 +3,7 @@
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 <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -119,10 +119,11 @@
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 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/category/value_traits/properties.html

@@ -3,7 +3,7 @@
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+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -111,10 +111,11 @@
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 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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doc/html/boost_typetraits/category/value_traits/relate.html

@@ -3,11 +3,11 @@
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-<link rel="next" href="../transform.html" title="Type Traits that Transform One Type to Another">
+<link rel="next" href="operators.html" title="Operator Type Traits">
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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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+<a accesskey="p" href="properties.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../value_traits.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="operators.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a>
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doc/html/boost_typetraits/credits.html

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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
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-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
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-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
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-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
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-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
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         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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doc/html/boost_typetraits/reference/add_const.html

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@@ -53,7 +53,7 @@
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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
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doc/html/boost_typetraits/reference/add_cv.html

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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
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doc/html/boost_typetraits/reference/add_lvalue_reference.html

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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
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doc/html/boost_typetraits/reference/add_pointer.html

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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
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doc/html/boost_typetraits/reference/add_reference.html

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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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doc/html/boost_typetraits/reference/add_rvalue_reference.html

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-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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doc/html/boost_typetraits/reference/add_volatile.html

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@@ -53,7 +53,7 @@
         or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
       </p>
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-<a name="boost_typetraits.reference.add_volatile.examples"></a><p class="title"><b>Table&#160;1.11.&#160;Examples</b></p>
+<a name="boost_typetraits.reference.add_volatile.examples"></a><p class="title"><b>Table&#160;1.16.&#160;Examples</b></p>
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-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/reference/aligned_storage.html

@@ -3,7 +3,7 @@
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-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -45,10 +45,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/reference/alignment_of.html

@@ -3,7 +3,7 @@
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-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -65,10 +65,11 @@
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-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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doc/html/boost_typetraits/reference/common_type.html

@@ -3,7 +3,7 @@
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@@ -335,10 +335,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/reference/conditional.html

@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title>conditional</title>
 <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -45,10 +45,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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doc/html/boost_typetraits/reference/decay.html

@@ -3,7 +3,7 @@
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 <title>decay</title>
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+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -48,7 +48,7 @@
         or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
       </p>
 <div class="table">
-<a name="boost_typetraits.reference.decay.examples"></a><p class="title"><b>Table&#160;1.12.&#160;Examples</b></p>
+<a name="boost_typetraits.reference.decay.examples"></a><p class="title"><b>Table&#160;1.17.&#160;Examples</b></p>
 <div class="table-contents"><table class="table" summary="Examples">
 <colgroup>
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@@ -134,10 +134,11 @@
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 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/reference/extent.html

@@ -3,7 +3,7 @@
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 <title>extent</title>
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-<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -91,10 +91,11 @@
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

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@@ -3,7 +3,7 @@
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+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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@@ -48,7 +48,7 @@
         or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
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 <div class="table">
-<a name="boost_typetraits.reference.floating_point_promotion.examples"></a><p class="title"><b>Table&#160;1.13.&#160;Examples</b></p>
+<a name="boost_typetraits.reference.floating_point_promotion.examples"></a><p class="title"><b>Table&#160;1.18.&#160;Examples</b></p>
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@@ -111,10 +111,11 @@
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-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>

doc/html/boost_typetraits/reference/function_traits.html

@@ -3,11 +3,11 @@
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+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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-<link rel="next" href="has_new_operator.html" title="has_new_operator">
+<link rel="next" href="has_bit_and.html" title="has_bit_and">
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 <hr>
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+<a accesskey="p" href="floating_point_promotion.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_bit_and.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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@@ -59,7 +59,7 @@
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+<a name="boost_typetraits.reference.function_traits.function_traits_members"></a><p class="title"><b>Table&#160;1.19.&#160;Function Traits Members</b></p>
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@@ -122,7 +122,7 @@
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+<a name="boost_typetraits.reference.function_traits.examples"></a><p class="title"><b>Table&#160;1.20.&#160;Examples</b></p>
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@@ -267,10 +267,11 @@
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 <td align="left"></td>
-<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2006 Adobe Systems Inc, David Abrahams,
-      Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat
-      Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
-      Ramey and Jeremy Siek<p>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
@@ -278,7 +279,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav">
-<a accesskey="p" href="floating_point_promotion.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_new_operator.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+<a accesskey="p" href="floating_point_promotion.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_bit_and.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 </div>
 </body>
 </html>

doc/html/boost_typetraits/reference/has_bit_and.html

@@ -0,0 +1,150 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_bit_and</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Chapter&#160;1.&#160;Boost.TypeTraits">
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+<link rel="prev" href="function_traits.html" title="function_traits">
+<link rel="next" href="has_bit_and_assign.html" title="has_bit_and_assign">
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+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../index.html">Home</a></td>
+<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
+<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_bit_and"></a><a class="link" href="has_bit_and.html" title="has_bit_and">has_bit_and</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_bit_and</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&amp;</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&amp;</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&amp;</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_bit_and&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_bit_and</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_bit_and</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&amp;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&amp;(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&amp;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_and</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="function_traits.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_bit_and_assign.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

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+<a accesskey="p" href="has_bit_and.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_bit_or.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_bit_and_assign"></a><a class="link" href="has_bit_and_assign.html" title="has_bit_and_assign">has_bit_and_assign</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_bit_and_assign</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&amp;=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&amp;=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&amp;=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_bit_and_assign&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_bit_and_assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_bit_and_assign</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&amp;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&amp;=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&amp;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_and_assign</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_bit_and.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_bit_or.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_bit_or"></a><a class="link" href="has_bit_or.html" title="has_bit_or">has_bit_or</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_bit_or</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">|</span><span class="identifier">rhs</span></code>, and
+        (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">|</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">|</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">|</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_bit_or&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_bit_or</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">|</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">|</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_bit_or</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">|</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">|(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator|(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">|(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_or</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_bit_and_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_bit_or_assign.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
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+</html>

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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_bit_or_assign"></a><a class="link" href="has_bit_or_assign.html" title="has_bit_or_assign">has_bit_or_assign</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_bit_or_assign</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">|=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">|=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">|=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">|=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_bit_or_assign&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_bit_or_assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">|=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">|=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_bit_or_assign</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">|=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">|=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator|=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">|=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_or_assign</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_bit_or.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_bit_xor.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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+</div>
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+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_bit_xor"></a><a class="link" href="has_bit_xor.html" title="has_bit_xor">has_bit_xor</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_bit_xor</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">^</span><span class="identifier">rhs</span></code>, and
+        (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">^</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">^</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">^</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_bit_xor&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_bit_xor</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">^</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">^</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_bit_xor</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">^</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">^(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator^(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">^(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_xor</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_bit_xor_assign"></a><a class="link" href="has_bit_xor_assign.html" title="has_bit_xor_assign">has_bit_xor_assign</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_bit_xor_assign</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">^=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">^=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">^=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">^=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_bit_xor_assign&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_bit_xor_assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">^=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">^=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_bit_xor_assign</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">^=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">^=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator^=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">^=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_bit_xor_assign</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_bit_xor.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_complement.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

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+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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+<a accesskey="p" href="has_bit_xor_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_dereference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_complement"></a><a class="link" href="has_complement.html" title="has_complement">has_complement</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_complement</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">rhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Rhs</span></code> can be used in
+        expression <code class="computeroutput"><span class="special">~</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="special">~</span><span class="identifier">rhs</span></code>
+        is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> then
+        inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of prefix <code class="computeroutput"><span class="keyword">operator</span><span class="special">~</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(~</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_complement&lt;Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_complement</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether prefix <code class="computeroutput"><span class="keyword">operator</span><span class="special">~</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">~</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Rhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_complement</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">~</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">~();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator~() is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">~(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_complement</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_bit_xor_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_dereference.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

doc/html/boost_typetraits/reference/has_dereference.html

@@ -0,0 +1,166 @@
+<html>
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+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_dereference</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
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+<link rel="prev" href="has_complement.html" title="has_complement">
+<link rel="next" href="has_divides.html" title="has_divides">
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_dereference"></a><a class="link" href="has_dereference.html" title="has_dereference">has_dereference</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_dereference</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">rhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Rhs</span></code> can be used in
+        expression <code class="computeroutput"><span class="special">*</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="special">*</span><span class="identifier">rhs</span></code>
+        is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> then
+        inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of prefix <code class="computeroutput"><span class="keyword">operator</span><span class="special">*</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(*</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_dereference&lt;Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_dereference</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">*&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">const</span>
+          <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">int</span> <span class="keyword">const</span> <span class="special">*&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">int</span> <span class="special">*</span> <span class="keyword">const</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">int</span> <span class="keyword">const</span> <span class="special">*</span> <span class="keyword">const</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">*&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">*,</span> <span class="keyword">int</span><span class="special">&amp;&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether prefix <code class="computeroutput"><span class="keyword">operator</span><span class="special">*</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">*</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Rhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_dereference</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">*</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">*();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator*() is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">*(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_dereference</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_complement.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_divides.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

doc/html/boost_typetraits/reference/has_divides.html

@@ -0,0 +1,154 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_divides</title>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_divides"></a><a class="link" href="has_divides.html" title="has_divides">has_divides</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_divides</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">/</span><span class="identifier">rhs</span></code>, and
+        (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">/</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">/</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">/</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_divides&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_divides</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">/</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">/</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_divides</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">/</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">/(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator/(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">/(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_divides</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_dereference.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_divides_assign.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

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+<html>
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+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_divides_assign</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Chapter&#160;1.&#160;Boost.TypeTraits">
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+<hr>
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+<a accesskey="p" href="has_divides.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_equal_to.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_divides_assign"></a><a class="link" href="has_divides_assign.html" title="has_divides_assign">has_divides_assign</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_divides_assign</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">/=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">/=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">/=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">/=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_divides_assign&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_divides_assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">/=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">/=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_divides_assign</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">/=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">/=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator/=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">/=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_divides_assign</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_divides.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_equal_to.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

doc/html/boost_typetraits/reference/has_equal_to.html

@@ -0,0 +1,155 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_equal_to</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Chapter&#160;1.&#160;Boost.TypeTraits">
+<link rel="up" href="../reference.html" title="Alphabetical Reference">
+<link rel="prev" href="has_divides_assign.html" title="has_divides_assign">
+<link rel="next" href="has_greater.html" title="has_greater">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../index.html">Home</a></td>
+<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
+<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
+<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
+<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_divides_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_greater.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_equal_to"></a><a class="link" href="has_equal_to.html" title="has_equal_to">has_equal_to</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_equal_to</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">==</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">==</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">==</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">==</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_equal_to&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_equal_to</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">double</span><span class="special">*&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">==</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">==</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_equal_to</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">==</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">==(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator==(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">==(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_equal_to</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_divides_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_greater.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

doc/html/boost_typetraits/reference/has_greater.html

@@ -0,0 +1,155 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_greater</title>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_greater"></a><a class="link" href="has_greater.html" title="has_greater">has_greater</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_greater</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&gt;</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&gt;</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&gt;</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_greater&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_greater</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">double</span><span class="special">*&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_greater</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&gt;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&gt;(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&gt;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_greater</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_equal_to.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_greater_equal.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_greater_equal"></a><a class="link" href="has_greater_equal.html" title="has_greater_equal">has_greater_equal</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_greater_equal</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&gt;=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&gt;=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&gt;=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_greater_equal&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_greater_equal</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">double</span><span class="special">*&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_greater_equal</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&gt;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&gt;=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&gt;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_greater_equal</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_greater.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_left_shift.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

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+<a accesskey="p" href="has_greater_equal.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_left_shift_assign.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_left_shift"></a><a class="link" href="has_left_shift.html" title="has_left_shift">has_left_shift</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_left_shift</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;&lt;</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;&lt;</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&lt;&lt;</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_left_shift&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_left_shift</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span><span class="special">,</span> <span class="keyword">char</span><span class="special">*,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_left_shift</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&lt;&lt;(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_left_shift</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_left_shift_assign"></a><a class="link" href="has_left_shift_assign.html" title="has_left_shift_assign">has_left_shift_assign</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_left_shift_assign</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;&lt;=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;&lt;=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&lt;&lt;=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_left_shift_assign&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_left_shift_assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_left_shift_assign</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;&lt;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&lt;&lt;=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;&lt;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_left_shift_assign</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_left_shift.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_less.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

doc/html/boost_typetraits/reference/has_less.html

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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_less</title>
+<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
+<link rel="home" href="../../index.html" title="Chapter&#160;1.&#160;Boost.TypeTraits">
+<link rel="up" href="../reference.html" title="Alphabetical Reference">
+<link rel="prev" href="has_left_shift_assign.html" title="has_left_shift_assign">
+<link rel="next" href="has_less_equal.html" title="has_less_equal">
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+<table cellpadding="2" width="100%"><tr>
+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../../index.html">Home</a></td>
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+<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
+<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
+<td align="center"><a href="../../../../../../more/index.htm">More</a></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_left_shift_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_less_equal.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_less"></a><a class="link" href="has_less.html" title="has_less">has_less</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_less</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&lt;</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_less&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_less</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">double</span><span class="special">*&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_less</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_less</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_less</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&lt;(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_less</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_less</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_left_shift_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_less_equal.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

doc/html/boost_typetraits/reference/has_less_equal.html

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+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>has_less_equal</title>
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+<link rel="up" href="../reference.html" title="Alphabetical Reference">
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+<hr>
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+<a accesskey="p" href="has_less.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_logical_and.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_less_equal"></a><a class="link" href="has_less_equal.html" title="has_less_equal">has_less_equal</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_less_equal</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&lt;=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&lt;=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_less_equal&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_less_equal</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">int</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*,</span> <span class="keyword">double</span><span class="special">*&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_less_equal</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&lt;=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&lt;=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_less_equal</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_less.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_logical_and.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

doc/html/boost_typetraits/reference/has_logical_and.html

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+<html>
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+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_logical_and"></a><a class="link" href="has_logical_and.html" title="has_logical_and">has_logical_and</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_logical_and</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&amp;&amp;</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">&amp;&amp;</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;&amp;</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">&amp;&amp;</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_logical_and&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_logical_and</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;&amp;</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;&amp;</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_logical_and</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">&amp;&amp;</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&amp;&amp;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator&amp;&amp;(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">&amp;&amp;(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_and</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_less_equal.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_logical_not.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_logical_not"></a><a class="link" href="has_logical_not.html" title="has_logical_not">has_logical_not</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_logical_not</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">rhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Rhs</span></code> can be used in
+        expression <code class="computeroutput"><span class="special">!</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="special">!</span><span class="identifier">rhs</span></code>
+        is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> then
+        inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of prefix <code class="computeroutput"><span class="keyword">operator</span><span class="special">!</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(!</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_logical_not&lt;Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_logical_not</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">bool</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether prefix <code class="computeroutput"><span class="keyword">operator</span><span class="special">!</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">!</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Rhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="identifier">Rhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_logical_not</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">!</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">!();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator!() is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">!(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_not</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_logical_and.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_logical_or.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_logical_or"></a><a class="link" href="has_logical_or.html" title="has_logical_or">has_logical_or</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_logical_or</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">||</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">||</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">||</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">||</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_logical_or&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_logical_or</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">||</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">||</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_logical_or</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">||</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">||(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator||(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">||(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_logical_or</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_logical_not.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_minus.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_minus"></a><a class="link" href="has_minus.html" title="has_minus">has_minus</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_minus</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">-</span><span class="identifier">rhs</span></code>, and
+        (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">-</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">-</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">-</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_minus&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_minus</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">-</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">-</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_minus</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">-</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">-(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator-(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">-(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_minus</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_logical_or.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_minus_assign.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>

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+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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+<a accesskey="p" href="has_minus.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_modulus.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_minus_assign"></a><a class="link" href="has_minus_assign.html" title="has_minus_assign">has_minus_assign</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_minus_assign</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">-=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">-=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">-=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">-=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_minus_assign&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_minus_assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">-=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">-=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_minus_assign</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">-=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">-=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator-=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">-=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_minus_assign</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_minus.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_modulus.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_modulus"></a><a class="link" href="has_modulus.html" title="has_modulus">has_modulus</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_modulus</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">%</span><span class="identifier">rhs</span></code>, and
+        (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">%</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">%</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">%</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_modulus&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_modulus</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">%</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">%</span></code> is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code> then instantiating <code class="computeroutput"><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code>
+            will produce a compiler error. For this reason <code class="computeroutput"><span class="identifier">has_modulus</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">%</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">%(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator%(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">%(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_modulus</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="has_minus_assign.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="has_modulus_assign.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
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+</div>
+<div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="boost_typetraits.reference.has_modulus_assign"></a><a class="link" href="has_modulus_assign.html" title="has_modulus_assign">has_modulus_assign</a>
+</h3></div></div></div>
+<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Rhs</span><span class="special">=</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span><span class="special">&gt;</span>
+<span class="keyword">struct</span> <span class="identifier">has_modulus_assign</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
+</pre>
+<p>
+        <span class="bold"><strong>Inherits:</strong></span> If (i) <code class="computeroutput"><span class="identifier">lhs</span></code>
+        of type <code class="computeroutput"><span class="identifier">Lhs</span></code> and <code class="computeroutput"><span class="identifier">rhs</span></code> of type <code class="computeroutput"><span class="identifier">Rhs</span></code>
+        can be used in expression <code class="computeroutput"><span class="identifier">lhs</span><span class="special">%=</span><span class="identifier">rhs</span></code>,
+        and (ii) <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code> or the result of expression
+        <code class="computeroutput"><span class="identifier">lhs</span><span class="special">%=</span><span class="identifier">rhs</span></code> is convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>
+        then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
+        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
+      </p>
+<p>
+        The default behaviour (<code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="identifier">dont_care</span></code>)
+        is to not check for the return value of binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">%=</span></code>. If <code class="computeroutput"><span class="identifier">Ret</span></code>
+        is different from the default <code class="computeroutput"><span class="identifier">dont_care</span></code>
+        type, the return value is checked to be convertible to <code class="computeroutput"><span class="identifier">Ret</span></code>.
+        Convertible to <code class="computeroutput"><span class="identifier">Ret</span></code> means
+        that the return value of the operator can be used as argument to a function
+        expecting <code class="computeroutput"><span class="identifier">Ret</span></code>: 
+</p>
+<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Ret</span><span class="special">);</span>
+<span class="identifier">Lhs</span> <span class="identifier">lhs</span><span class="special">;</span>
+<span class="identifier">Rhs</span> <span class="identifier">rhs</span><span class="special">;</span>
+<span class="identifier">f</span><span class="special">(</span><span class="identifier">lhs</span><span class="special">%=</span><span class="identifier">rhs</span><span class="special">);</span> <span class="comment">// is valid if has_modulus_assign&lt;Lhs, Rhs, Ret&gt;::value==true</span>
+</pre>
+<p>
+        If <code class="computeroutput"><span class="identifier">Ret</span><span class="special">=</span><span class="keyword">void</span></code>, the return type is checked to be exactly
+        <code class="computeroutput"><span class="keyword">void</span></code>.
+      </p>
+<p>
+        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"><span class="preprocessor">#include</span>
+        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_modulus_assign</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+        or <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">has_operator</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
+      </p>
+<p>
+        <span class="bold"><strong>Examples:</strong></span>
+      </p>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">,</span> <span class="identifier">Rhs</span><span class="special">,</span> <span class="identifier">Ret</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is a <code class="computeroutput"><span class="keyword">bool</span></code>
+          integral constant expression that evaluates to <code class="computeroutput"><span class="keyword">true</span></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">long</span><span class="special">&gt;</span></code>
+          inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<div class="blockquote"><blockquote class="blockquote"><p>
+          <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span><span class="special">&gt;</span></code> inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code>.
+        </p></blockquote></div>
+<p>
+        <span class="bold"><strong>See also:</strong></span> <a class="link" href="../category/value_traits/operators.html" title="Operator Type Traits">Operator
+        Type Traits</a>
+      </p>
+<p>
+        <span class="bold"><strong>Known issues:</strong></span>
+      </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc">
+<li class="listitem">
+            This trait cannot detect whether binary <code class="computeroutput"><span class="keyword">operator</span><span class="special">%=</span></code> is public or not: if <code class="computeroutput"><span class="keyword">operator</span><span class="special">%=</span></code>
+            is defined as a private member of <code class="computeroutput"><span class="identifier">Lhs</span></code>
+            then instantiating <code class="computeroutput"><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="identifier">Lhs</span><span class="special">&gt;</span></code> will produce a compiler error. For
+            this reason <code class="computeroutput"><span class="identifier">has_modulus_assign</span></code>
+            cannot be used to determine whether a type has a public <code class="computeroutput"><span class="keyword">operator</span><span class="special">%=</span></code>
+            or not. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="keyword">private</span><span class="special">:</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">%=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: A::operator%=(const A&amp;) is private</span>
+</pre>
+          </li>
+<li class="listitem">
+            There is an issue if the operator exists only for type <code class="computeroutput"><span class="identifier">A</span></code> and <code class="computeroutput"><span class="identifier">B</span></code>
+            is convertible to <code class="computeroutput"><span class="identifier">A</span></code>.
+            In this case, the compiler will report an ambiguous overload. 
+<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> <span class="special">{</span> <span class="special">};</span>
+<span class="keyword">void</span> <span class="keyword">operator</span><span class="special">%=(</span><span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;,</span> <span class="keyword">const</span> <span class="identifier">A</span><span class="special">&amp;);</span>
+<span class="keyword">struct</span> <span class="identifier">B</span> <span class="special">{</span> <span class="keyword">operator</span> <span class="identifier">A</span><span class="special">();</span> <span class="special">};</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// this is fine</span>
+<span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_modulus_assign</span><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">value</span><span class="special">;</span> <span class="comment">// error: ambiguous overload</span>
+</pre>
+          </li>
+<li class="listitem">
+            <code class="computeroutput"><span class="keyword">volatile</span></code> qualifier is not
+            properly handled and would lead to undefined behavior
+          </li>
+</ul></div>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
+      Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
+      Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
+      Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
+      Watanabe<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
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