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078dd3ec30 This commit was manufactured by cvs2svn to create tag
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[SVN r10239]
2001-05-28 15:01:00 +00:00
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#ifndef BOOST_ITERATOR_CONCEPTS_HPP
#define BOOST_ITERATOR_CONCEPTS_HPP
#include <boost/concept_check.hpp>
#include <boost/iterator_traits.hpp>
#include <boost/type_traits/conversion_traits.hpp>
#include <boost/static_assert.hpp>
namespace boost_concepts {
// Used a different namespace here (instead of "boost") so that the
// concept descriptions do not take for granted the names in
// namespace boost.
//===========================================================================
// Iterator Access Concepts
template <typename Iterator>
class ReadableIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::value_type value_type;
typedef typename boost::iterator_traits<Iterator>::reference reference;
typedef typename boost::iterator_traits<Iterator>::return_category
return_category;
void constraints() {
boost::function_requires< boost::SGIAssignableConcept<Iterator> >();
boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
boost::function_requires<
boost::DefaultConstructibleConcept<Iterator> >();
BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
boost::readable_iterator_tag*>::value));
reference r = *i; // or perhaps read(x)
value_type v(r);
boost::ignore_unused_variable_warning(v);
}
Iterator i;
};
template <typename Iterator, typename ValueType>
class WritableIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::return_category
return_category;
void constraints() {
boost::function_requires< boost::SGIAssignableConcept<Iterator> >();
boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
boost::function_requires<
boost::DefaultConstructibleConcept<Iterator> >();
BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
boost::writable_iterator_tag*>::value));
*i = v; // an alternative could be something like write(x, v)
}
ValueType v;
Iterator i;
};
template <typename Iterator>
class ConstantLvalueIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::value_type value_type;
typedef typename boost::iterator_traits<Iterator>::reference reference;
typedef typename boost::iterator_traits<Iterator>::return_category
return_category;
void constraints() {
boost::function_requires< ReadableIteratorConcept<Iterator> >();
BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
boost::constant_lvalue_iterator_tag*>::value));
BOOST_STATIC_ASSERT((boost::is_same<reference,
const value_type&>::value));
reference v = *i;
boost::ignore_unused_variable_warning(v);
}
Iterator i;
};
template <typename Iterator>
class MutableLvalueIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::value_type value_type;
typedef typename boost::iterator_traits<Iterator>::reference reference;
typedef typename boost::iterator_traits<Iterator>::return_category
return_category;
void constraints() {
boost::function_requires< ReadableIteratorConcept<Iterator> >();
boost::function_requires<
WritableIteratorConcept<Iterator, value_type> >();
BOOST_STATIC_ASSERT((boost::is_convertible<return_category*,
boost::mutable_lvalue_iterator_tag*>::value));
BOOST_STATIC_ASSERT((boost::is_same<reference, value_type&>::value));
reference v = *i;
boost::ignore_unused_variable_warning(v);
}
Iterator i;
};
//===========================================================================
// Iterator Traversal Concepts
template <typename Iterator>
class SinglePassIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::traversal_category
traversal_category;
typedef typename boost::iterator_traits<Iterator>::difference_type
difference_type;
void constraints() {
boost::function_requires< boost::SGIAssignableConcept<Iterator> >();
boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
boost::function_requires<
boost::DefaultConstructibleConcept<Iterator> >();
BOOST_STATIC_ASSERT((boost::is_convertible<traversal_category*,
boost::single_pass_iterator_tag*>::value));
// difference_type must be a signed integral type
++i;
(void)i++;
}
Iterator i;
};
template <typename Iterator>
class ForwardIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::traversal_category
traversal_category;
void constraints() {
boost::function_requires< SinglePassIteratorConcept<Iterator> >();
BOOST_STATIC_ASSERT((boost::is_convertible<traversal_category*,
boost::forward_iterator_tag*>::value));
}
};
template <typename Iterator>
class BidirectionalIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::traversal_category
traversal_category;
void constraints() {
boost::function_requires< ForwardIteratorConcept<Iterator> >();
BOOST_STATIC_ASSERT((boost::is_convertible<traversal_category*,
boost::bidirectional_iterator_tag*>::value));
--i;
(void)i--;
}
Iterator i;
};
template <typename Iterator>
class RandomAccessIteratorConcept {
public:
typedef typename boost::iterator_traits<Iterator>::traversal_category
traversal_category;
typedef typename boost::iterator_traits<Iterator>::difference_type
difference_type;
void constraints() {
boost::function_requires< BidirectionalIteratorConcept<Iterator> >();
BOOST_STATIC_ASSERT((boost::is_convertible<traversal_category*,
boost::random_access_iterator_tag*>::value));
i += n;
i = i + n;
i = n + i;
i -= n;
i = i - n;
n = i - j;
}
difference_type n;
Iterator i, j;
};
} // namespace boost_concepts
#endif // BOOST_ITERATOR_CONCEPTS_HPP

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#ifndef BOOST_ITERATOR_TRAITS_HPP
#define BOOST_ITERATOR_TRAITS_HPP
#include <boost/config.hpp>
#include <boost/type_traits/conversion_traits.hpp>
#include <boost/type_traits/cv_traits.hpp>
#include <boost/pending/ct_if.hpp>
#include <boost/detail/iterator.hpp>
namespace boost {
// Traversal Categories
struct single_pass_iterator_tag { };
struct forward_iterator_tag : public single_pass_iterator_tag { };
struct bidirectional_iterator_tag : public forward_iterator_tag { };
struct random_access_iterator_tag : public bidirectional_iterator_tag { };
// Return Type Categories
struct readable_iterator_tag { };
struct writable_iterator_tag { };
struct mutable_lvalue_iterator_tag : virtual public writable_iterator_tag,
virtual public readable_iterator_tag { };
struct constant_lvalue_iterator_tag : public readable_iterator_tag { };
struct error_iterator_tag { };
// Inherit from iterator_base if your iterator defines its own
// return_category and traversal_category. Otherwise, the "old style"
// iterator category will be mapped to the return_category and
// traversal_category.
struct new_iterator_base { };
namespace detail {
struct iter_traits_from_nested_types {
template <typename Iterator> struct bind {
typedef typename Iterator::value_type value_type;
typedef typename Iterator::reference reference;
typedef typename Iterator::pointer pointer;
typedef typename Iterator::difference_type difference_type;
typedef typename Iterator::return_category return_category;
typedef typename Iterator::traversal_category traversal_category;
};
};
template <typename ValueType>
struct choose_lvalue_return {
typedef typename ct_if<is_const<ValueType>::value,
boost::constant_lvalue_iterator_tag,
boost::mutable_lvalue_iterator_tag>::type type;
};
template <typename Category, typename ValueType>
struct iter_category_to_return {
typedef typename ct_if<
is_convertible<Category*, std::forward_iterator_tag*>::value,
typename choose_lvalue_return<ValueType>::type,
typename ct_if<
is_convertible<Category*, std::input_iterator_tag*>::value,
boost::readable_iterator_tag,
typename ct_if<
is_convertible<Category*, std::output_iterator_tag*>::value,
boost::writable_iterator_tag,
boost::error_iterator_tag
>::type
>::type
>::type type;
};
template <typename Category>
struct iter_category_to_traversal {
typedef typename ct_if<
is_convertible<Category*, std::random_access_iterator_tag*>::value,
boost::random_access_iterator_tag,
typename ct_if<
is_convertible<Category*, std::bidirectional_iterator_tag*>::value,
boost::bidirectional_iterator_tag,
typename ct_if<
is_convertible<Category*, std::forward_iterator_tag*>::value,
boost::forward_iterator_tag,
boost::single_pass_iterator_tag>::type
>::type
>::type type;
};
struct iter_traits_from_old_traits {
template <typename Iterator> class bind {
typedef boost::detail::iterator_traits<Iterator> OldTraits;
typedef typename OldTraits::iterator_category Cat;
public:
typedef typename OldTraits::value_type value_type;
typedef typename OldTraits::reference reference;
typedef typename OldTraits::pointer pointer;
typedef typename OldTraits::difference_type difference_type;
typedef iter_category_to_return<Cat,value_type>::type return_category;
typedef iter_category_to_traversal<Cat>::type traversal_category;
};
};
template <typename Iterator>
class choose_iter_traits {
typedef typename ct_if<is_convertible<Iterator*,
new_iterator_base*>::value,
iter_traits_from_nested_types,
iter_traits_from_old_traits>::type Choice;
public:
typedef typename Choice:: template bind<Iterator> type;
};
} // namespace detail
template <typename Iterator>
class iterator_traits
: public detail::choose_iter_traits<Iterator>::type { };
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template <typename T>
struct iterator_traits<T*>
{
typedef T value_type;
typedef T& reference;
typedef T* pointer;
typedef std::ptrdiff_t difference_type;
typedef typename ct_if<is_const<T>::value,
boost::constant_lvalue_iterator_tag,
boost::mutable_lvalue_iterator_tag>::type
return_category;
typedef boost::random_access_iterator_tag traversal_category;
};
#endif
} // namespace boost
#endif // BOOST_ITERATOR_TRAITS_HPP

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#include <boost/iterator_concepts.hpp>
#include <boost/operators.hpp>
struct new_iterator
: public boost::iterator<std::random_access_iterator_tag, int>,
public boost::new_iterator_base
{
typedef boost::random_access_iterator_tag traversal_category;
typedef boost::mutable_lvalue_iterator_tag return_category;
int& operator*() const { return *m_x; }
new_iterator& operator++() { return *this; }
new_iterator operator++(int) { return *this; }
new_iterator& operator--() { return *this; }
new_iterator operator--(int) { return *this; }
new_iterator& operator+=(std::ptrdiff_t) { return *this; }
new_iterator operator+(std::ptrdiff_t) { return *this; }
new_iterator& operator-=(std::ptrdiff_t) { return *this; }
std::ptrdiff_t operator-(const new_iterator&) const { return 0; }
new_iterator operator-(std::ptrdiff_t) const { return *this; }
bool operator==(const new_iterator&) const { return false; }
bool operator!=(const new_iterator&) const { return false; }
bool operator<(const new_iterator&) const { return false; }
int* m_x;
};
new_iterator operator+(std::ptrdiff_t, new_iterator x) { return x; }
struct old_iterator
: public boost::iterator<std::random_access_iterator_tag, int>
{
int& operator*() const { return *m_x; }
old_iterator& operator++() { return *this; }
old_iterator operator++(int) { return *this; }
old_iterator& operator--() { return *this; }
old_iterator operator--(int) { return *this; }
old_iterator& operator+=(std::ptrdiff_t) { return *this; }
old_iterator operator+(std::ptrdiff_t) { return *this; }
old_iterator& operator-=(std::ptrdiff_t) { return *this; }
old_iterator operator-(std::ptrdiff_t) const { return *this; }
std::ptrdiff_t operator-(const old_iterator&) const { return 0; }
bool operator==(const old_iterator&) const { return false; }
bool operator!=(const old_iterator&) const { return false; }
bool operator<(const old_iterator&) const { return false; }
int* m_x;
};
old_iterator operator+(std::ptrdiff_t, old_iterator x) { return x; }
struct bar { };
void foo(bar) { }
int
main()
{
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
boost::function_requires<
boost_concepts::MutableLvalueIteratorConcept<int*> >();
boost::function_requires<
boost_concepts::RandomAccessIteratorConcept<int*> >();
boost::function_requires<
boost_concepts::ConstantLvalueIteratorConcept<const int*> >();
boost::function_requires<
boost_concepts::RandomAccessIteratorConcept<const int*> >();
#endif
boost::function_requires<
boost_concepts::MutableLvalueIteratorConcept<new_iterator> >();
boost::function_requires<
boost_concepts::RandomAccessIteratorConcept<new_iterator> >();
boost::function_requires<
boost_concepts::MutableLvalueIteratorConcept<old_iterator> >();
boost::function_requires<
boost_concepts::RandomAccessIteratorConcept<old_iterator> >();
return 0;
}

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<HTML>
<!--
-- Copyright (c) Jeremy Siek 2000
--
-- Permission to use, copy, modify, distribute and sell this software
-- and its documentation for any purpose is hereby granted without fee,
-- provided that the above copyright notice appears in all copies and
-- that both that copyright notice and this permission notice appear
-- in supporting documentation. I make no representations about the
-- suitability of this software for any purpose. It is provided "as is"
-- without express or implied warranty.
-->
<!--
-- Copyright (c) 1996-1999
-- Silicon Graphics Computer Systems, Inc.
--
-- Permission to use, copy, modify, distribute and sell this software
-- and its documentation for any purpose is hereby granted without fee,
-- provided that the above copyright notice appears in all copies and
-- that both that copyright notice and this permission notice appear
-- in supporting documentation. Silicon Graphics makes no
-- representations about the suitability of this software for any
-- purpose. It is provided "as is" without express or implied warranty.
--
-- Copyright (c) 1994
-- Hewlett-Packard Company
--
-- Permission to use, copy, modify, distribute and sell this software
-- and its documentation for any purpose is hereby granted without fee,
-- provided that the above copyright notice appears in all copies and
-- that both that copyright notice and this permission notice appear
-- in supporting documentation. Hewlett-Packard Company makes no
-- representations about the suitability of this software for any
-- purpose. It is provided "as is" without express or implied warranty.
--
-->
<Head>
<Title>Iterator Concepts</Title>
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
ALINK="#ff0000">
<IMG SRC="../../../../c++boost.gif"
ALT="C++ Boost" width="277" height="86">
<BR Clear>
<h1>Iterator Concepts</h1>
<p>The standard iterator concepts (the iterator requirements defined
in the C++ Standard) have a flaw. They glom together two separate
issues into a single set of concepts. The two issues are iterator
traversal and dereference return type semantics. These two issues are
inherently orthogonal and therefore ought to be represented by two
separate sets of concepts. The concepts described here do just
that.</p>
One set of concepts handles the return type semantics:
<ul>
<li><a href="#concept:ReadableIterator">Readable Iterator</a></li>
<li><a href="#concept:WritableIterator">Writable Iterator</a></li>
<li><a href="#concept:MutableLvalueIterator">Mutable Lvalue Iterator</a></li>
<li><a href="#concept:ConstantLvalueIterator">Constant Lvalue Iterator</a></li>
</ul>
The other set of concepts handles iterator traversal:
<ul>
<li><a href="#concept:SinglePassIterator">Single-Pass Iterator</a></li>
<li><a href="#concept:ForwardIterator">Forward Iterator</a></li>
<li><a href="#concept:BidirectionalIterator">Bidirectional Iterator</a></li>
<li><a href="#concept:RandomAccessIterator">Random Access Iterator</a></li>
</ul>
<p></p>
<DIV ALIGN="CENTER"><A NAME="fig:graph-concepts"></A></A>
<TABLE>
<CAPTION ALIGN="TOP"><STRONG>Figure 1:</STRONG>
The iterator concepts and refinement relationships.
</CAPTION>
<TR><TD><IMG SRC="./iterator_concepts.gif" width="541" height="214"></TD></TR>
</TABLE>
</DIV>
<p></p>
<h2>Relationship with the standard iterator concepts</h2>
<p>
std::Input Iterator refines boost::Single-Pass Iterator and
boost::ReadableIterator.
<p>
std::Output Iterator refines boost::Single-Pass Iterator and
boost::Writable Iterator.
<p>
std::Forward Iterator refines boost::Forward Iterator and
boost::Constant Lvalue Iterator or boost::Mutable Lvalue Iterator.
<p>
std::Bidirectional Iterator refines boost::Bidirectional Iterator and
boost::Constant Lvalue Iterator or boost::Mutable Lvalue Iterator.
<p>
std::Random Access Iterator refines boost::Random Access Iterator and
boost::Constant Lvalue Iterator or boost::Mutable Lvalue Iterator.
<h3>Notation</h3>
<Table>
<TR>
<TD><tt>X</tt></TD>
<TD>The iterator type.</TD>
</TR>
<TR>
<TD><tt>T</tt></TD>
<TD>The value type of <tt>X</tt>.</TD>
</TR>
<TR>
<TD><tt>x</tt>, <tt>y</tt></TD>
<TD>An object of type <tt>X</tt>.</TD>
</TR>
<TR>
<TD><tt>t</tt></TD>
<TD>An object of type <tt>T</tt>.</TD>
</tr>
</table>
<p>
<hr>
<H2><A NAME="concept:ReadableIterator"></A>
Readable Iterator
</H2>
A Readable Iterator is an iterator that dereferences to produce an
rvalue that is convertible to the <tt>value_type</tt> of the
iterator. For example, derefencing may return a temporary object and
therefore it would be a mistake to bind the result to a reference.
Also, an attempt to assign a value to the result will most likely
cause an error.
<pre>
template &lt;class Readable Iterator&gt;
void foo(Readable Iterator x)
{
typedef std::iterator_traits&lt;Readable Iterator&gt;::value_type T;
T t = *x; // Read a value. This is OK.
T& s = *x; // Bind to a reference. This is a bad idea.
*x = t; // Try to assign. This is a really bad idea.
}
</pre>
<h3>Associated Types</h3>
<Table border>
<TR>
<TD>Value type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::value_type</tt></TD>
<TD>
The type of the value obtained by dereferencing a LvalueIterator
</TD>
</tr>
<TR>
<TD>Return Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::return_category</tt></TD>
<TD>
A type convertible to <tt>boost::readable_iterator_tag</tt>
</TD>
</tr>
</Table>
<h3>Refinement of</h3>
<A href="http://www.sgi.com/Technology/STL/Assignable.html">Assignable</A>,
<A href="http://www.sgi.com/Technology/STL/EqualityComparable.html">Equality Comparable</A>,
<A href="http://www.sgi.com/Technology/STL/DefaultConstructible.html">Default Constructible</A>
<h3>Valid expressions</h3>
<Table border>
<TR><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH><TH>Return type</TH></TR>
<TR>
<TD>Dereference</TD>
<TD><tt>*x</tt></TD>
<TD>&nbsp;</TD>
<TD>Convertible to <tt>T</tt>.</TD>
</TR>
<TR>
<TD>Member access</TD>
<TD><tt>x-&gt;m</tt></TD>
<TD><tt>T</tt> is a type with a member named <tt>m</tt>.</TD>
<TD>
&nbsp;
</TD>
</tr>
</table>
<p>
<hr>
<H2><A NAME="concept:WritableIterator"></A>
Writable Iterator
</H2>
A Writable Iterator is an iterator that can be used to store a value
using the dereference-assignment expression.
<h3>Definitions</h3>
If <tt>x</tt> is an Writable Iterator of type <tt>X</tt>, then the
expression <tt>*x = a;</tt> stores the value <tt>a</tt> into
<tt>x</tt>. Note that <tt>operator=</tt>, like other C++ functions,
may be overloaded; it may, in fact, even be a template function. In
general, then, <tt>a</tt> may be any of several different types. A
type <tt>A</tt> belongs to the <i>set of value types</i> of <tt>X</tt>
if, for an object <tt>a</tt> of type <tt>A</tt>, <tt>*x = a;</tt> is
well-defined and does not require performing any non-trivial
conversions on <tt>a</tt>.
<h3>Associated Types</h3>
<Table border>
<TR>
<TD>Return Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::return_category</tt></TD>
<TD>
A type convertible to <tt>boost::writable_iterator_tag</tt>
</TD>
</tr>
</Table>
<h3>Refinement of</h3>
<A href="http://www.sgi.com/Technology/STL/Assignable.html">Assignable</A>,
<A href="http://www.sgi.com/Technology/STL/EqualityComparable.html">Equality Comparable</A>,
<A href="http://www.sgi.com/Technology/STL/DefaultConstructible.html">Default Constructible</A>
<h3>Valid expressions</h3>
<Table border>
<TR>
<TH>Name</TH><TH>Expression</TH><TH>Return type</TH>
</TR>
<TR>
<TD>Dereference assignment</TD>
<TD><tt>*x = a</tt></TD>
<TD>unspecified</TD>
</TR>
</table>
<p>
<hr>
<H2><A NAME="concept:ConstantLvalueIterator"></A>
Constant Lvalue Iterator
</H2>
A Constant Lvalue Iterator is an iterator that dereferences to produce a
const reference to the pointed-to object, i.e., the associated
<tt>reference</tt> type is <tt>const T&amp;</tt>. Changing the value
of or destroying an iterator that models Constant Lvalue Iterator does
not invalidate pointers and references previously obtained from that
iterator.
<h3>Refinement of</h3>
<a href="#concept:Readable Iterator">Readable Iterator</a>
<h3>Associated Types</h3>
<Table border>
<TR>
<TD>Value type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::value_type</tt></TD>
<TD>
The type of the value obtained by dereferencing a Constant Lvalue Iterator.
</TD>
</tr>
<TR>
<TD>Reference type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::reference</tt></TD>
<TD>
The return type of <tt>operator*()</tt>, which must be
<tt>const T&amp;</tt>.
</TD>
</tr>
<TR>
<TD>POinter type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::pointer</tt></TD>
<TD>
The pointer to the value type, which must be <tt>const T*</tt>.
</TD>
</tr>
<TR>
<TD>Return Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::return_category</tt></TD>
<TD>
A type convertible to <tt>boost::constant_lvalue_iterator_tag</tt>
</TD>
</tr>
</table>
<h3>Valid expressions</h3>
<Table border>
<TR><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH><TH>Return type</TH></TR>
<TR>
<TD>Dereference</TD>
<TD><tt>*x</tt></TD>
<TD>&nbsp;</TD>
<TD><tt>const T&amp;</tt></TD>
</TR>
<TR>
<TD>Member access</TD>
<TD><tt>x-&gt;m</tt></TD>
<TD><tt>T</tt> is a type with a member named <tt>m</tt>.</TD>
<TD>
&nbsp;
</TD>
</tr>
</table>
<H2><A NAME="concept:MutableLvalueIterator"></A>
Mutable Lvalue Iterator
</H2>
A Mutable Lvalue Iterator is an iterator that dereferences to produce a
reference to the pointed-to object. The associated <tt>reference</tt>
type is <tt>T&amp;</tt>. Changing the value of or destroying an
iterator that models Mutable Lvalue Iterator does not invalidate
pointers and references previously obtained from that iterator.
<h3>Refinement of</h3>
<a href="#concept:Readable Iterator">Readable Iterator</a> and
<a href="#concept:WritableIterator">Writable Iterator</a>.
<h3>Associated Types</h3>
<Table border>
<TR>
<TD>Value type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::value_type</tt></TD>
<TD>
The type of the value obtained by dereferencing a Mutable Lvalue Iterator.
</TD>
</tr>
<TR>
<TD>Reference type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::reference</tt></TD>
<TD>
The return type of <tt>operator*()</tt>, which is
<tt>T&amp;</tt>.
</TD>
</tr>
<TR>
<TD>Pointer type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::pointer</tt></TD>
<TD>
The pointer to the value type, which is <tt>T*</tt>.
</TD>
</tr>
<TR>
<TD>Return Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::return_category</tt></TD>
<TD>
A type convertible to <tt>boost::mutable_lvalue_iterator_tag</tt>
</TD>
</tr>
</table>
<h3>Valid expressions</h3>
<Table border>
<TR><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH><TH>Return type</TH></TR>
<TR>
<TD>Dereference</TD>
<TD><tt>*x</tt></TD>
<TD>&nbsp;</TD>
<TD> <tt>T&amp;</tt> </TD>
</TR>
<TR>
<TD>Member access</TD>
<TD><tt>x-&gt;m</tt></TD>
<TD><tt>T</tt> is a type with a member named <tt>m</tt>.</TD>
<TD>
&nbsp;
</TD>
</tr>
</table>
<p>
<hr>
<H2><A NAME="concept:SinglePassIterator"></A>
Single-Pass Iterator
</H2>
A Single-Pass Iterator is an iterator that can be incremented to
traverse through a sequence of objects, but the sequence can only be
traversed a single time.
<h3>Associated types</h3>
<Table border>
<TR>
<TD>Difference type</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::difference_type</tt></TD>
<TD>
A signed integral type used to represent the distance from one
iterator to another, or the number of elements in a range.
</TD>
</TR>
<TR>
<TD>Traversal Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::traversal_category</tt></TD>
<TD>
A type convertible to <tt>boost::single_pass_iterator_tag</tt>
</TD>
</tr>
</table>
<h3>Valid expressions</h3>
<Table border>
<TR>
<TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH>
<TH>Return type</TH>
</TR>
<TR>
<TD>Preincrement</TD>
<TD><tt>++i</tt></TD><TD>&nbsp;</TD><TD><tt>X&amp;</tt></TD>
</TR>
<TR>
<TD>Postincrement</TD>
<TD><tt>(void)i++</tt></TD><TD>&nbsp;</TD><TD>&nbsp;</TD>
</TR>
</Table>
<p>
<hr>
<H2><A NAME="concept:ForwardIterator"></A>
Forward Iterator
</H2>
The Forward Iterator is an iterator that can be incremented. Also, it
is permissible to make multiple passes through the sequence.
<h3>Refinement of</h3>
<a href="#concept:SinglePassIterator">Single-Pass Iterator</a>
<h3>Associated types</h3>
<Table border>
<TR>
<TD>Traversal Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::traversal_category</tt></TD>
<TD>
A type convertible to <tt>boost::forward_iterator_tag</tt>
</TD>
</tr>
</Table>
<p>
<hr>
<H2><A NAME="concept:BidirectionalIterator"></A>
Bidirectional Iterator
</H2>
An iterator that can be incremented and decremented.
<h3>Refinement of</h3>
<a href="#concept:ForwardIterator">Forward Iterator</a>
<h3>Associated types</h3>
<Table border>
<TR>
<TD>Traversal Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::traversal_category</tt></TD>
<TD>
A type convertible to <tt>boost::bidirectional_iterator_tag</tt>
</TD>
</tr>
</Table>
<h3>Valid expressions</h3>
<Table border>
<TR>
<TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH>
<TH>Return type</TH>
</TR>
<TR><TD>Predecrement</TD>
<TD><tt>--i</tt></TD><TD>&nbsp;</TD><TD><tt>X&amp;</tt></TD>
</TR>
<TR><TD>Postdecrement</TD>
<TD><tt>i--</tt></TD><TD>&nbsp;</TD><TD><tt>X</tt></TD>
</tr>
</table>
<p>
<hr>
<H2><A NAME="concept:RandomAccessIterator"></A>
Random Access Iterator
</H2>
An iterator that provides constant-time methods for moving forward and
backward in arbitrary-sized steps
<h3>Refinement of</h3>
<a href="#concept:BidirectionalIterator">Bidirectional Iterator</a>
<h3>Associated types</h3>
<Table border>
<TR>
<TD>Traversal Category</TD>
<TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::traversal_category</tt></TD>
<TD>
A type convertible to <tt>boost::random_access_iterator_tag</tt>
</TD>
</tr>
</Table>
<h3>Valid expressions</h3>
<Table border>
<TR><TH>Name</TH><TH>Expression</TH><TH>Type requirements</TH>
<TH>Return type</TH>
</TR>
<TR><TD>Iterator addition</TD>
<TD><tt>i += n</tt></TD><TD>&nbsp;</TD><TD><tt>X&amp;</tt></TD>
</TR>
<TR><TD>Iterator addition</TD>
<TD><tt>i + n</tt> or <tt>n + i</tt></TD><TD>&nbsp;</TD><TD><tt>X</tt></TD>
</TR>
<TR><TD>Iterator subtraction</TD>
<TD><tt>i -= n</tt></TD><TD>&nbsp;</TD><TD><tt>X&amp;</tt></TD>
</TR>
<TR><TD>Iterator subtraction</TD>
<TD><tt>i - n</tt></TD><TD>&nbsp;</TD><TD><tt>X</tt></TD>
</TR>
<TR><TD>Difference</TD>
<TD><tt>i - j</tt></TD><TD>&nbsp;</TD><TD><tt><a href="./iterator_traits.htm">boost::iterator_traits</a>&lt;X&gt;::difference_type</tt></TD>
</TR>
<TR><TD>Element operator</TD>
<TD><tt>i[n]</tt></TD>
<TD><tt>X</tt> must be a model of
<a href="#concept:Readable Iterator">Readable Iterator</a>. </TD>
<TD>The same return type as <tt>*i</tt>.</TD>
</TR>
<TR><TD>Element assignment</TD>
<TD><tt>i[n] = t</tt></TD>
<TD><tt>X</tt> must be a model of
<a href="#concept:WritableIterator">Writable Iterator</a>.</TD>
<TD>unspecified</TD>
</tr>
</table>
<hr>
<HR>
<TABLE>
<TR valign=top>
<TD nowrap>Copyright &copy 2000</TD><TD>
<A HREF="../../../../people/jeremy_siek.htm">Jeremy Siek</A>, Univ.of Notre Dame (<A HREF="mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</A>)
</TD></TR></TABLE>
</body>
</html>

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@ -0,0 +1,137 @@
<html>
<!--
-- Copyright (c) Jeremy Siek 2000
--
-- Permission to use, copy, modify, distribute and sell this software
-- and its documentation for any purpose is hereby granted without fee,
-- provided that the above copyright notice appears in all copies and
-- that both that copyright notice and this permission notice appear
-- in supporting documentation. I make no representations about the
-- suitability of this software for any purpose. It is provided "as is"
-- without express or implied warranty.
-->
<head>
<title>Boost Iterator Traits</title>
</head>
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
ALINK="#ff0000">
<IMG SRC="../../../../c++boost.gif"
ALT="C++ Boost" width="277" height="86">
<BR Clear>
<h1>Boost Iterator Traits</h1>
Header <tt><a href="../../boost/iterator_traits.hpp">boost/iterator_traits.hpp</a></tt>
<p>
The <tt>boost::iterator_traits</tt> class provides access to the
associated types of iterators that model the Boost <a
href="./iterator_concepts.htm">Iterator Concepts</a>, which are a
replacement for the iterator requirements in the C++ standard.
The main difference between <tt>std::iterator_traits</tt> and
<tt>boost::iterator_traits</tt> is that the <tt>iterator_category</tt>
type has been removed, and replaced with two new types:
<ul>
<li><tt>traversal_category</tt>:&nbsp;&nbsp; Can the iterator go forward, backward, etc.?
<li><tt>return_category</tt>:&nbsp;&nbsp; Is the iterator read or write only?
Is the dereferenced type an lvalue?
</ul>
<p>
An important feature of the <tt>boost::iterator_traits</tt> is that it
is <b>backwards compatible</b>, i.e., it will automatically work for
iterators for which there are valid definitions of
<tt>std::iterator_traits</tt>. The old <tt>iterator_category</tt> is
mapped to the appropriate traversal and return categories.
<p>
When creating a new iterator type that is meant to work with
<tt>boost::iterator_traits</tt>, you can either create a
specialization of <tt>boost::iterator_traits</tt> for your iterator
type, or you can provide all the necessary associated types as nested
typedefs. In this case, your iterator class will need to inherit from
<tt>new_iterator_base</tt> to let <tt>boost::iterator_traits</tt> know
that it will be able to find typedefs for <tt>traversal_category</tt>
and <tt>return_category</tt> in you iterator class.
<pre>
namespace boost {
<i>// Inherit from iterator_base if your iterator defines its own
// return_category and traversal_category. Otherwise, the "old style"
// iterator category will be mapped to the return_category and
// traversal_category.</i>
struct new_iterator_base { };
template &lt;typename Iterator&gt;
struct iterator_traits
{
if (Iterator inherits from new_iterator_base) {
typedef typename Iterator::value_type value_type;
typedef typename Iterator::reference reference;
typedef typename Iterator::pointer pointer;
typedef typename Iterator::difference_type difference_type;
typedef typename Iterator::return_category return_category;
typedef typename Iterator::traversal_category traversal_category;
} else {
typedef std::iterator_traits&lt;Iterator&gt; OldTraits;
typedef typename OldTraits::value_type value_type;
typedef typename OldTraits::reference reference;
typedef typename OldTraits::pointer pointer;
typedef typename OldTraits::difference_type difference_type;
typedef typename OldTraits::iterator_category Cat;
<i>// Determine the traversal_category based on the old iterator_category</i>
if (Cat inherits from std::random_access_iterator_tag)
typedef boost::random_access_iterator_tag traversal_category;
else if (Cat inherits from std::bidirectional_iterator_tag)
typedef boost::bidirectional_iterator_tag traversal_category;
else if (Cat inherits from std::forward_iterator_tag)
typedef boost::forward_iterator_tag traversal_category;
else
typedef boost::single_pass_iterator_tag traversal_category;
<i>// Determine the return_category based on the old iterator_category and value_type</i>
if (Cat inherits from std::forward_iterator_tag)
if (is-const(T))
typedef boost::constant_lvalue_iterator_tag return_category;
else
typedef boost::mutable_lvalue_iterator_tag return_category;
else if (Cat inherits from std::input_iterator_tag)
typedef boost::readable_iterator_tag return_category;
else if (Cat inherits from std::output_iterator_tag)
typedef boost::writable_iterator_tag return_category;
else
typedef boost::error_iterator_tag return_category;
}
};
template &lt;typename T&gt;
struct iterator_traits&lt;T*&gt;
{
typedef T value_type;
typedef T&amp; reference;
typedef T* pointer;
typedef std::ptrdiff_t difference_type;
if (is-const(T))
typedef boost::constant_lvalue_iterator_tag return_category;
else
typedef boost::mutable_lvalue_iterator_tag return_category;
typedef boost::random_access_iterator_tag traversal_category;
};
}
</pre>
<hr>
<address><a href="mailto:jsiek@lsc.nd.edu">jeremy siek</a></address>
<!-- Created: Sun Mar 18 14:06:57 EST 2001 -->
<!-- hhmts start -->
Last modified: Mon Mar 19 12:59:30 EST 2001
<!-- hhmts end -->
</body>
</html>

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@ -0,0 +1,215 @@
// (C) Copyright David Abrahams and Jeremy Siek 2000-2001. Permission to copy,
// use, modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided "as is"
// without express or implied warranty, and with no claim as to its suitability
// for any purpose.
//
// See http://www.boost.org for most recent version including documentation.
//
// Supplies:
//
// template <class Incrementable> class counting_iterator_traits;
// template <class Incrementable> class counting_iterator_policies;
//
// Iterator traits and policies for adapted iterators whose dereferenced
// value progresses through consecutive values of Incrementable when the
// iterator is derferenced.
//
// template <class Incrementable> struct counting_iterator_generator;
//
// A "type generator" whose nested type "type" is a counting iterator as
// described above.
//
// template <class Incrementable>
// typename counting_iterator_generator<Incrementable>::type
// make_counting_iterator(Incrementable);
//
// A function which produces an adapted counting iterator over values of
// Incrementable.
//
// Revision History
// 14 Feb 2001 Removed unnecessary typedefs from counting_iterator_traits
// (Jeremy Siek)
// 11 Feb 2001 Use BOOST_STATIC_CONSTANT (Dave Abrahams)
// 11 Feb 2001 Clean up after John Maddocks's (finally effective!) Borland
// fixes (David Abrahams).
// 10 Feb 2001 Use new iterator_adaptor<> interface (David Abrahams)
// 10 Feb 2001 Rolled in supposed Borland fixes from John Maddock, but not
// seeing any improvement yet (David Abrahams)
// 09 Feb 2001 Factored out is_numeric computation. Borland still
// unhappy :( (David Abrahams)
// 08 Feb 2001 Beginning of a failed attempt to appease Borland
// (David Abrahams)
// 07 Feb 2001 rename counting_iterator() -> make_counting_iterator()
// (David Abrahams)
// 04 Feb 2001 Added counting_iterator_generator; updated comments
// (David Abrahams)
// 24 Jan 2001 initial revision, based on Jeremy Siek's
// boost/pending/integer_range.hpp (David Abrahams)
#ifndef BOOST_COUNTING_ITERATOR_HPP_DWA20000119
# define BOOST_COUNTING_ITERATOR_HPP_DWA20000119
# include <boost/config.hpp>
# include <boost/detail/iterator.hpp>
# include <boost/iterator_adaptors.hpp>
# include <boost/type_traits.hpp>
# include <boost/detail/numeric_traits.hpp>
# include <boost/static_assert.hpp>
# ifndef BOOST_NO_LIMITS
# include <limits>
# endif
namespace boost {
namespace detail {
// Template class counting_iterator_traits_select -- choose an
// iterator_category and difference_type for a counting_iterator at
// compile-time based on whether or not it wraps an integer or an iterator,
// using "poor man's partial specialization".
template <bool is_integer> struct counting_iterator_traits_select;
// Incrementable is an iterator type
template <>
struct counting_iterator_traits_select<false>
{
template <class Incrementable>
struct traits
{
private:
typedef boost::detail::iterator_traits<Incrementable> x;
public:
typedef typename x::iterator_category iterator_category;
typedef typename x::difference_type difference_type;
};
};
// Incrementable is a numeric type
template <>
struct counting_iterator_traits_select<true>
{
template <class Incrementable>
struct traits
{
typedef typename
boost::detail::numeric_traits<Incrementable>::difference_type
difference_type;
typedef std::random_access_iterator_tag iterator_category;
};
};
// Template class distance_policy_select -- choose a policy for computing the
// distance between counting_iterators at compile-time based on whether or not
// the iterator wraps an integer or an iterator, using "poor man's partial
// specialization".
template <bool is_integer> struct distance_policy_select;
// A policy for wrapped iterators
template <>
struct distance_policy_select<false>
{
template <class Distance, class Incrementable>
struct policy {
static Distance distance(Incrementable x, Incrementable y)
{ return boost::detail::distance(x, y); }
};
};
// A policy for wrapped numbers
template <>
struct distance_policy_select<true>
{
template <class Distance, class Incrementable>
struct policy {
static Distance distance(Incrementable x, Incrementable y)
{ return numeric_distance(x, y); }
};
};
// Try to detect numeric types at compile time in ways compatible with the
// limitations of the compiler and library.
template <class T>
struct is_numeric {
// For a while, this wasn't true, but we rely on it below. This is a regression assert.
BOOST_STATIC_ASSERT(::boost::is_integral<char>::value);
# ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
BOOST_STATIC_CONSTANT(bool, value = std::numeric_limits<T>::is_specialized);
# else
# if !defined(__BORLANDC__)
BOOST_STATIC_CONSTANT(bool, value = (
boost::is_convertible<int,T>::value && boost::is_convertible<T,int>::value));
# else
BOOST_STATIC_CONSTANT(bool, value = ::boost::is_arithmetic<T>::value);
# endif
# endif
};
// Compute the distance over arbitrary numeric and/or iterator types
template <class Distance, class Incrementable>
Distance any_distance(Incrementable start, Incrementable finish, Distance* = 0)
{
return distance_policy_select<(
is_numeric<Incrementable>::value)>::template
policy<Distance, Incrementable>::distance(start, finish);
}
} // namespace detail
template <class Incrementable>
struct counting_iterator_traits {
private:
typedef ::boost::detail::counting_iterator_traits_select<(
::boost::detail::is_numeric<Incrementable>::value
)> binder;
typedef typename binder::template traits<Incrementable> traits;
public:
typedef typename traits::difference_type difference_type;
typedef typename traits::iterator_category iterator_category;
};
template <class Incrementable>
struct counting_iterator_policies : public default_iterator_policies
{
const Incrementable& dereference(type<const Incrementable&>, const Incrementable& i) const
{ return i; }
template <class Difference, class Iterator1, class Iterator2>
Difference distance(type<Difference>, const Iterator1& x,
const Iterator2& y) const
{
return boost::detail::any_distance<Difference>(x, y);//,(Difference*)());
}
};
// A type generator for counting iterators
template <class Incrementable>
struct counting_iterator_generator
{
typedef counting_iterator_traits<Incrementable> traits;
typedef iterator_adaptor<Incrementable,
counting_iterator_policies<Incrementable>,
Incrementable,
const Incrementable&,
const Incrementable*,
typename traits::iterator_category,
typename traits::difference_type
> type;
};
// Manufacture a counting iterator for an arbitrary incrementable type
template <class Incrementable>
inline typename counting_iterator_generator<Incrementable>::type
make_counting_iterator(Incrementable x)
{
typedef typename counting_iterator_generator<Incrementable>::type result_t;
return result_t(x);
}
} // namespace boost
#endif // BOOST_COUNTING_ITERATOR_HPP_DWA20000119

View File

@ -26,9 +26,7 @@ namespace boost {
typedef void pointer;
typedef void reference;
explicit function_output_iterator() {}
explicit function_output_iterator(const UnaryFunction& f)
explicit function_output_iterator(const UnaryFunction& f = UnaryFunction())
: m_f(f) {}
struct output_proxy {

View File

@ -99,17 +99,17 @@ struct half_open_range
public:
typedef iter_t const_iterator;
typedef typename iterator::value_type value_type;
typedef typename iterator::difference_type difference_type;
typedef typename iterator::reference reference;
typedef typename iterator::reference const_reference;
typedef typename iterator::pointer pointer;
typedef typename iterator::pointer const_pointer;
typedef typename counting_iterator_traits<Incrementable>::value_type value_type;
typedef typename counting_iterator_traits<Incrementable>::difference_type difference_type;
typedef typename counting_iterator_traits<Incrementable>::reference reference;
typedef typename counting_iterator_traits<Incrementable>::reference const_reference;
typedef typename counting_iterator_traits<Incrementable>::pointer pointer;
typedef typename counting_iterator_traits<Incrementable>::pointer const_pointer;
// It would be nice to select an unsigned type, but this is appropriate
// since the library makes an attempt to select a difference_type which can
// hold the difference between any two iterators.
typedef typename iterator::difference_type size_type;
typedef typename counting_iterator_traits<Incrementable>::difference_type size_type;
half_open_range(Incrementable start, Incrementable finish)
: m_start(start),

View File

@ -5,7 +5,7 @@
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// See http://www.boost.org/libs/utility for documentation.
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 12 Jan 01 added <cstddef> for std::ptrdiff_t (Jens Maurer)
@ -21,7 +21,7 @@
namespace boost
{
# if defined(BOOST_NO_STD_ITERATOR) && !defined(BOOST_MSVC_STD_ITERATOR)
# ifdef BOOST_NO_STD_ITERATOR
template <class Category, class T,
class Distance = std::ptrdiff_t,
class Pointer = T*, class Reference = T&>

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@ -1,216 +0,0 @@
// Copyright David Abrahams 2003. Permission to copy, use,
// modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef COUNTING_ITERATOR_DWA200348_HPP
# define COUNTING_ITERATOR_DWA200348_HPP
# include <boost/iterator/iterator_adaptor.hpp>
# include <boost/detail/numeric_traits.hpp>
# include <boost/mpl/bool.hpp>
# include <boost/mpl/if.hpp>
# include <boost/mpl/identity.hpp>
# include <boost/mpl/apply_if.hpp>
namespace boost {
template <
class Incrementable
, class CategoryOrTraversal
, class Difference
>
class counting_iterator;
namespace detail
{
// Try to detect numeric types at compile time in ways compatible
// with the limitations of the compiler and library.
template <class T>
struct is_numeric_impl
{
// For a while, this wasn't true, but we rely on it below. This is a regression assert.
BOOST_STATIC_ASSERT(::boost::is_integral<char>::value);
# ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
BOOST_STATIC_CONSTANT(bool, value = std::numeric_limits<T>::is_specialized);
# else
# if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
BOOST_STATIC_CONSTANT(
bool, value = (
boost::is_convertible<int,T>::value
&& boost::is_convertible<T,int>::value
));
# else
BOOST_STATIC_CONSTANT(bool, value = ::boost::is_arithmetic<T>::value);
# endif
# endif
};
template <class T>
struct is_numeric
: mpl::bool_<(::boost::detail::is_numeric_impl<T>::value)>
{};
# if defined(BOOST_HAS_LONG_LONG)
template <>
struct is_numeric<long long>
: mpl::true_ {};
template <>
struct is_numeric<unsigned long long>
: mpl::true_ {};
# endif
// Some compilers fail to have a numeric_limits specialization
template <>
struct is_numeric<wchar_t>
: mpl::true_ {};
template <class T>
struct numeric_difference
{
typedef typename boost::detail::numeric_traits<T>::difference_type type;
};
BOOST_STATIC_ASSERT(is_numeric<int>::value);
template <class Incrementable, class CategoryOrTraversal, class Difference>
struct counting_iterator_base
{
typedef typename detail::ia_dflt_help<
CategoryOrTraversal
, mpl::apply_if<
is_numeric<Incrementable>
, mpl::identity<random_access_traversal_tag>
, iterator_traversal<Incrementable>
>
>::type traversal;
typedef typename detail::ia_dflt_help<
Difference
, mpl::apply_if<
is_numeric<Incrementable>
, numeric_difference<Incrementable>
, iterator_difference<Incrementable>
>
>::type difference;
typedef iterator_adaptor<
counting_iterator<Incrementable, CategoryOrTraversal, Difference> // self
, Incrementable // Base
, Incrementable // Value
# ifndef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
const // MSVC won't strip this. Instead we enable Thomas'
// criterion (see boost/iterator/detail/facade_iterator_category.hpp)
# endif
, traversal
, Incrementable const& // reference
, difference
> type;
};
// Template class distance_policy_select -- choose a policy for computing the
// distance between counting_iterators at compile-time based on whether or not
// the iterator wraps an integer or an iterator, using "poor man's partial
// specialization".
template <bool is_integer> struct distance_policy_select;
// A policy for wrapped iterators
template <class Difference, class Incrementable1, class Incrementable2>
struct iterator_distance
{
static Difference distance(Incrementable1 x, Incrementable2 y)
{
return y - x;
}
};
// A policy for wrapped numbers
template <class Difference, class Incrementable1, class Incrementable2>
struct number_distance
{
static Difference distance(Incrementable1 x, Incrementable2 y)
{
return numeric_distance(x, y);
}
};
}
template <
class Incrementable
, class CategoryOrTraversal = use_default
, class Difference = use_default
>
class counting_iterator
: public detail::counting_iterator_base<
Incrementable, CategoryOrTraversal, Difference
>::type
{
typedef typename detail::counting_iterator_base<
Incrementable, CategoryOrTraversal, Difference
>::type super_t;
friend class iterator_core_access;
public:
typedef typename super_t::difference_type difference_type;
counting_iterator() { }
counting_iterator(counting_iterator const& rhs) : super_t(rhs.base()) {}
counting_iterator(Incrementable x)
: super_t(x)
{
}
# if 0
template<class OtherIncrementable>
counting_iterator(
counting_iterator<OtherIncrementable> const& t
, typename enable_if_convertible<OtherIncrementable, Incrementable>::type* = 0
)
: super_t(t.base())
{}
# endif
private:
typename super_t::reference dereference() const
{
return this->base_reference();
}
template <class OtherIncrementable>
difference_type
distance_to(counting_iterator<OtherIncrementable> const& y) const
{
typedef typename mpl::if_<
detail::is_numeric<Incrementable>
, detail::number_distance<difference_type, Incrementable, OtherIncrementable>
, detail::iterator_distance<difference_type, Incrementable, OtherIncrementable>
>::type d;
return d::distance(this->base(), y.base());
}
};
// Manufacture a counting iterator for an arbitrary incrementable type
template <class Incrementable>
inline counting_iterator<Incrementable>
make_counting_iterator(Incrementable x)
{
typedef counting_iterator<Incrementable> result_t;
return result_t(x);
}
} // namespace boost::iterator
#endif // COUNTING_ITERATOR_DWA200348_HPP

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@ -1,19 +0,0 @@
// Copyright David Abrahams 2003. Use, modification and distribution is
// subject to 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)
#ifndef ANY_CONVERSION_EATER_DWA20031117_HPP
# define ANY_CONVERSION_EATER_DWA20031117_HPP
namespace boost { namespace detail {
// This type can be used in traits to "eat" up the one user-defined
// implicit conversion allowed.
struct any_conversion_eater
{
template <class T>
any_conversion_eater(T const&);
};
}} // namespace boost::detail
#endif // ANY_CONVERSION_EATER_DWA20031117_HPP

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#error obsolete

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// no include guard multiple inclusion intended
//
// This is a temporary workaround until the bulk of this is
// available in boost config.
// 23/02/03 thw
//
#include <boost/config.hpp> // for prior
#include <boost/detail/workaround.hpp>
#ifdef BOOST_ITERATOR_CONFIG_DEF
# error you have nested config_def #inclusion.
#else
# define BOOST_ITERATOR_CONFIG_DEF
#endif
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x531))
// Recall that in general, compilers without partial specialization
// can't strip constness. Consider counting_iterator, which normally
// passes a const Value to iterator_facade. As a result, any code
// which makes a std::vector of the iterator's value_type will fail
// when its allocator declares functions overloaded on reference and
// const_reference (the same type).
//
// Furthermore, Borland 5.5.1 drops constness in enough ways that we
// end up using a proxy for operator[] when we otherwise shouldn't.
// Using reference constness gives it an extra hint that it can
// return the value_type from operator[] directly, but is not
// strictly neccessary. Not sure how best to resolve this one.
# define BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY 1
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x531)) \
|| (BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, <= 700) && defined(_MSC_VER))
# define BOOST_NO_LVALUE_RETURN_DETECTION
# if 0 // test code
struct v {};
typedef char (&no)[3];
template <class T>
no foo(T const&, ...);
template <class T>
char foo(T&, int);
struct value_iterator
{
v operator*() const;
};
template <class T>
struct lvalue_deref_helper
{
static T& x;
enum { value = (sizeof(foo(*x,0)) == 1) };
};
int z2[(lvalue_deref_helper<v*>::value == 1) ? 1 : -1];
int z[(lvalue_deref_helper<value_iterator>::value) == 1 ? -1 : 1 ];
# endif
#endif
#if BOOST_WORKAROUND(__MWERKS__, <=0x2407)
# define BOOST_NO_IS_CONVERTIBLE // "is_convertible doesn't work for simple types"
#endif
#if BOOST_WORKAROUND(__GNUC__, == 2) \
|| BOOST_WORKAROUND(__GNUC__, == 3) && BOOST_WORKAROUND(__GNUC_MINOR__, < 4) && !defined(__EDG_VERSION__) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
# define BOOST_NO_IS_CONVERTIBLE_TEMPLATE // The following program fails to compile:
# if 0 // test code
#include <boost/type_traits/is_convertible.hpp>
template <class T>
struct foo
{
foo(T);
template <class U>
foo(foo<U> const& other) : p(other.p) { }
T p;
};
bool x = boost::is_convertible<foo<int const*>, foo<int*> >::value;
# endif
#endif
#if BOOST_WORKAROUND(__GNUC__, == 2 && __GNUC_MINOR__ == 95) \
|| BOOST_WORKAROUND(__MWERKS__, <= 0x2407) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
# define BOOST_ITERATOR_NO_MPL_AUX_HAS_XXX // "MPL's has_xxx facility doesn't work"
#endif
#if defined(BOOST_NO_SFINAE) || defined(BOOST_NO_IS_CONVERTIBLE) || defined(BOOST_NO_IS_CONVERTIBLE_TEMPLATE)
# define BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
#endif
# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
# define BOOST_ARG_DEPENDENT_TYPENAME typename
# else
# define BOOST_ARG_DEPENDENT_TYPENAME
# endif
# if BOOST_WORKAROUND(__GNUC__, == 2) && BOOST_WORKAROUND(__GNUC_MINOR__, BOOST_TESTED_AT(95)) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
// GCC-2.95 eagerly instantiates templated constructors and conversion
// operators in convertibility checks, causing premature errors.
//
// Borland's problems are harder to diagnose due to lack of an
// instantiation stack backtrace. They may be due in part to the fact
// that it drops cv-qualification willy-nilly in templates.
# define BOOST_NO_ONE_WAY_ITERATOR_INTEROP
# endif
// no include guard; multiple inclusion intended

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// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// no include guard multiple inclusion intended
//
// This is a temporary workaround until the bulk of this is
// available in boost config.
// 23/02/03 thw
//
#undef BOOST_NO_IS_CONVERTIBLE
#undef BOOST_NO_IS_CONVERTIBLE_TEMPLATE
#undef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
#undef BOOST_ARG_DEPENDENT_TYPENAME
#undef BOOST_NO_LVALUE_RETURN_DETECTION
#undef BOOST_NO_ONE_WAY_ITERATOR_INTEROP
#ifdef BOOST_ITERATOR_CONFIG_DEF
# undef BOOST_ITERATOR_CONFIG_DEF
#else
# error missing or nested #include config_def
#endif

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_ENABLE_IF_23022003THW_HPP
#define BOOST_ENABLE_IF_23022003THW_HPP
#include <boost/detail/workaround.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/iterator/detail/config_def.hpp>
//
// Boost iterators uses its own enable_if cause we need
// special semantics for deficient compilers.
// 23/02/03 thw
//
namespace boost
{
namespace iterators
{
//
// Base machinery for all kinds of enable if
//
template<bool>
struct enabled
{
template<typename T>
struct base
{
typedef T type;
};
};
//
// For compilers that don't support "Substitution Failure Is Not An Error"
// enable_if falls back to always enabled. See comments
// on operator implementation for consequences.
//
template<>
struct enabled<false>
{
template<typename T>
struct base
{
#ifdef BOOST_NO_SFINAE
typedef T type;
// This way to do it would give a nice error message containing
// invalid overload, but has the big disadvantage that
// there is no reference to user code in the error message.
//
// struct invalid_overload;
// typedef invalid_overload type;
//
#endif
};
};
template <class Cond,
class Return>
struct enable_if
# if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_IS_CONVERTIBLE)
: enabled<(Cond::value)>::template base<Return>
# else
: mpl::identity<Return>
# endif
{
# if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
typedef Return type;
# endif
};
} // namespace iterators
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ENABLE_IF_23022003THW_HPP

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// Copyright David Abrahams 2003. Use, modification and distribution is
// subject to 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)
#ifndef FACADE_ITERATOR_CATEGORY_DWA20031118_HPP
# define FACADE_ITERATOR_CATEGORY_DWA20031118_HPP
# include <boost/iterator/iterator_categories.hpp>
# include <boost/static_assert.hpp>
# include <boost/mpl/or.hpp> // used in iterator_tag inheritance logic
# include <boost/mpl/and.hpp>
# include <boost/mpl/if.hpp>
# include <boost/mpl/apply_if.hpp>
# include <boost/mpl/identity.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/type_traits/is_const.hpp>
# include <boost/type_traits/is_reference.hpp>
# include <boost/type_traits/is_convertible.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/iterator/detail/config_def.hpp> // try to keep this last
# ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
# include <boost/python/detail/indirect_traits.hpp>
# endif
//
// iterator_category deduction for iterator_facade
//
// forward declaration
namespace boost { struct use_default; }
namespace boost { namespace detail {
struct input_output_iterator_tag
: std::input_iterator_tag
{
// Using inheritance for only input_iterator_tag helps to avoid
// ambiguities when a stdlib implementation dispatches on a
// function which is overloaded on both input_iterator_tag and
// output_iterator_tag, as STLPort does, in its __valid_range
// function. I claim it's better to avoid the ambiguity in these
// cases.
operator std::output_iterator_tag() const
{
return std::output_iterator_tag();
}
};
//
// True iff the user has explicitly disabled writability of this
// iterator. Pass the iterator_facade's Value parameter and its
// nested ::reference type.
//
template <class ValueParam, class Reference>
struct iterator_writability_disabled
# ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY // Adding Thomas' logic?
: mpl::or_<
is_const<Reference>
, python::detail::is_reference_to_const<Reference>
, is_const<ValueParam>
>
# else
: is_const<ValueParam>
# endif
{};
//
// Convert an iterator_facade's traversal category, Value parameter,
// and ::reference type to an appropriate old-style category.
//
// If writability has been disabled per the above metafunction, the
// result will not be convertible to output_iterator_tag.
//
// Otherwise, if Traversal == single_pass_traversal_tag, the following
// conditions will result in a tag that is convertible both to
// input_iterator_tag and output_iterator_tag:
//
// 1. Reference is a reference to non-const
// 2. Reference is not a reference and is convertible to Value
//
template <class Traversal, class ValueParam, class Reference>
struct iterator_facade_default_category
: mpl::apply_if<
mpl::and_<
is_reference<Reference>
, is_convertible<Traversal,forward_traversal_tag>
>
, mpl::apply_if<
is_convertible<Traversal,random_access_traversal_tag>
, mpl::identity<std::random_access_iterator_tag>
, mpl::if_<
is_convertible<Traversal,bidirectional_traversal_tag>
, std::bidirectional_iterator_tag
, std::forward_iterator_tag
>
>
, typename mpl::apply_if<
mpl::and_<
is_convertible<Traversal, single_pass_traversal_tag>
// check for readability
, is_convertible<Reference, ValueParam>
>
, mpl::identity<std::input_iterator_tag>
, mpl::identity<Traversal>
>
>
{
};
// True iff T is convertible to an old-style iterator category.
template <class T>
struct is_iterator_category
: mpl::or_<
is_convertible<T,std::input_iterator_tag>
, is_convertible<T,std::output_iterator_tag>
>
{
};
template <class T>
struct is_iterator_traversal
: is_convertible<T,incrementable_traversal_tag>
{};
//
// A composite iterator_category tag convertible to Category (a pure
// old-style category) and Traversal (a pure traversal tag).
// Traversal must be a strict increase of the traversal power given by
// Category.
//
template <class Category, class Traversal>
struct iterator_category_with_traversal
: Category, Traversal
{
# if 0
// Because of limitations on multiple user-defined conversions,
// this should be a good test of whether convertibility is enough
// in the spec, or whether we need to specify inheritance.
operator Category() const { return Category(); }
operator Traversal() const { return Traversal(); }
# endif
# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
// Make sure this isn't used to build any categories where
// convertibility to Traversal is redundant. Should just use the
// Category element in that case.
BOOST_STATIC_ASSERT(
!(is_convertible<
typename iterator_category_to_traversal<Category>::type
, Traversal
>::value));
BOOST_STATIC_ASSERT(is_iterator_category<Category>::value);
BOOST_STATIC_ASSERT(!is_iterator_category<Traversal>::value);
BOOST_STATIC_ASSERT(!is_iterator_traversal<Category>::value);
# if !BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310))
BOOST_STATIC_ASSERT(is_iterator_traversal<Traversal>::value);
# endif
# endif
};
// Computes an iterator_category tag whose traversal is Traversal and
// which is appropriate for an iterator
template <class Traversal, class ValueParam, class Reference>
struct facade_iterator_category_impl
{
# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
BOOST_STATIC_ASSERT(!is_iterator_category<Traversal>::value);
# endif
typedef typename iterator_facade_default_category<
Traversal,ValueParam,Reference
>::type category;
typedef typename mpl::if_<
is_same<
Traversal
, typename iterator_category_to_traversal<category>::type
>
, category
, iterator_category_with_traversal<category,Traversal>
>::type type;
};
//
// Compute an iterator_category for iterator_facade
//
template <class CategoryOrTraversal, class ValueParam, class Reference>
struct facade_iterator_category
: mpl::apply_if<
is_iterator_category<CategoryOrTraversal>
, mpl::identity<CategoryOrTraversal> // old-style categories are fine as-is
, facade_iterator_category_impl<CategoryOrTraversal,ValueParam,Reference>
>
{
};
}} // namespace boost::detail
# include <boost/iterator/detail/config_undef.hpp>
#endif // FACADE_ITERATOR_CATEGORY_DWA20031118_HPP

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// Copyright David Abrahams 2003. Use, modification and distribution is
// subject to 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)
#ifndef MINIMUM_CATEGORY_DWA20031119_HPP
# define MINIMUM_CATEGORY_DWA20031119_HPP
# include <boost/type_traits/is_convertible.hpp>
# include <boost/type_traits/is_same.hpp>
# include <boost/mpl/aux_/lambda_support.hpp>
namespace boost { namespace detail {
//
// Returns the minimum category type or error_type
// if T1 and T2 are unrelated.
//
// For compilers not supporting is_convertible this only
// works with the new boost return and traversal category
// types. The exact boost _types_ are required. No derived types
// will work.
//
//
template <bool GreaterEqual, bool LessEqual>
struct minimum_category_impl
# if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
{
typedef void type;
}
# endif
;
template <class T1, class T2>
struct error_not_related_by_convertibility;
template <>
struct minimum_category_impl<true,false>
{
template <class T1, class T2> struct apply
{
typedef T2 type;
};
};
template <>
struct minimum_category_impl<false,true>
{
template <class T1, class T2> struct apply
{
typedef T1 type;
};
};
template <>
struct minimum_category_impl<true,true>
{
template <class T1, class T2> struct apply
{
BOOST_STATIC_ASSERT((is_same<T1,T2>::value));
typedef T1 type;
};
};
template <>
struct minimum_category_impl<false,false>
{
template <class T1, class T2> struct apply
: error_not_related_by_convertibility<T1,T2>
{
};
};
template <class T1 = mpl::_1, class T2 = mpl::_2>
struct minimum_category
{
typedef minimum_category_impl<
# if BOOST_WORKAROUND(BOOST_MSVC, == 1200) // ETI workaround
is_same<T2,int>::value ||
# endif
::boost::is_convertible<T1,T2>::value
, ::boost::is_convertible<T2,T1>::value
# if BOOST_WORKAROUND(BOOST_MSVC, == 1200) // ETI workaround
|| is_same<T1,int>::value
# endif
> outer;
typedef typename outer::template apply<T1,T2> inner;
typedef typename inner::type type;
BOOST_MPL_AUX_LAMBDA_SUPPORT(2,minimum_category,(T1,T2))
};
template <>
struct minimum_category<mpl::_1,mpl::_2>
{
template <class T1, class T2>
struct apply : minimum_category<T1,T2>
{};
};
# if BOOST_WORKAROUND(BOOST_MSVC, == 1200) // ETI workaround
template <>
struct minimum_category<int,int>
{
typedef int type;
};
# endif
}} // namespace boost::detail
#endif // MINIMUM_CATEGORY_DWA20031119_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_FILTER_ITERATOR_23022003THW_HPP
#define BOOST_FILTER_ITERATOR_23022003THW_HPP
#include <boost/iterator.hpp>
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/type_traits/is_class.hpp>
#include <boost/static_assert.hpp>
namespace boost
{
template <class Predicate, class Iterator>
class filter_iterator;
namespace detail
{
template <class Predicate, class Iterator>
struct filter_iterator_base
{
typedef iterator_adaptor<
filter_iterator<Predicate, Iterator>
, Iterator
, use_default
, typename mpl::if_<
is_convertible<
typename iterator_traversal<Iterator>::type
, bidirectional_traversal_tag
>
, forward_traversal_tag
, use_default
>::type
> type;
};
}
template <class Predicate, class Iterator>
class filter_iterator
: public detail::filter_iterator_base<Predicate, Iterator>::type
{
typedef typename detail::filter_iterator_base<
Predicate, Iterator
>::type super_t;
friend class iterator_core_access;
public:
filter_iterator() { }
filter_iterator(Predicate f, Iterator x, Iterator end = Iterator())
: super_t(x), m_predicate(f), m_end(end)
{
satisfy_predicate();
}
filter_iterator(Iterator x, Iterator end = Iterator())
: super_t(x), m_predicate(), m_end(end)
{
// Pro8 is a little too aggressive about instantiating the
// body of this function.
#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
// Don't allow use of this constructor if Predicate is a
// function pointer type, since it will be 0.
BOOST_STATIC_ASSERT(is_class<Predicate>::value);
#endif
satisfy_predicate();
}
template<class OtherIterator>
filter_iterator(
filter_iterator<Predicate, OtherIterator> const& t
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0
)
: super_t(t.base()), m_predicate(t.predicate()), m_end(t.end()) {}
Predicate predicate() const { return m_predicate; }
Iterator end() const { return m_end; }
private:
void increment()
{
++(this->base_reference());
satisfy_predicate();
}
void decrement()
{
while(!this->m_predicate(*--(this->base_reference()))){};
}
void satisfy_predicate()
{
while (this->base() != this->m_end && !this->m_predicate(*this->base()))
++(this->base_reference());
}
// Probably should be the initial base class so it can be
// optimized away via EBO if it is an empty class.
Predicate m_predicate;
Iterator m_end;
};
template <class Predicate, class Iterator>
filter_iterator<Predicate,Iterator>
make_filter_iterator(Predicate f, Iterator x, Iterator end = Iterator())
{
return filter_iterator<Predicate,Iterator>(f,x,end);
}
template <class Predicate, class Iterator>
filter_iterator<Predicate,Iterator>
make_filter_iterator(
typename iterators::enable_if<
is_class<Predicate>
, Iterator
>::type x
, Iterator end = Iterator()
#if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
, Predicate* = 0
#endif
)
{
return filter_iterator<Predicate,Iterator>(x,end);
}
} // namespace boost
#endif // BOOST_FILTER_ITERATOR_23022003THW_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_INDIRECT_ITERATOR_23022003THW_HPP
#define BOOST_INDIRECT_ITERATOR_23022003THW_HPP
#include <boost/iterator.hpp>
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/pointee.hpp>
#include <boost/indirect_reference.hpp>
#include <boost/detail/iterator.hpp>
#include <boost/python/detail/indirect_traits.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/apply_if.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/aux_/has_xxx.hpp>
#ifdef BOOST_MPL_NO_AUX_HAS_XXX
# include <boost/shared_ptr.hpp>
# include <boost/scoped_ptr.hpp>
# include <boost/mpl/bool.hpp>
# include <memory>
#endif
#include <boost/iterator/detail/config_def.hpp> // must be last #include
namespace boost
{
template <class Iter, class Value, class Category, class Reference, class Difference>
class indirect_iterator;
namespace detail
{
template <class Iter, class Value, class Category, class Reference, class Difference>
struct indirect_base
{
typedef typename iterator_traits<Iter>::value_type dereferenceable;
typedef iterator_adaptor<
indirect_iterator<Iter, Value, Category, Reference, Difference>
, Iter
, typename ia_dflt_help<
Value, pointee<dereferenceable>
>::type
, Category
, typename ia_dflt_help<
Reference
, mpl::apply_if<
is_same<Value,use_default>
, indirect_reference<dereferenceable>
, add_reference<Value>
>
>::type
, Difference
> type;
};
template <>
struct indirect_base<int, int, int, int, int> {};
} // namespace detail
template <
class Iterator
, class Value = use_default
, class Category = use_default
, class Reference = use_default
, class Difference = use_default
>
class indirect_iterator
: public detail::indirect_base<
Iterator, Value, Category, Reference, Difference
>::type
{
typedef typename detail::indirect_base<
Iterator, Value, Category, Reference, Difference
>::type super_t;
friend class iterator_core_access;
public:
indirect_iterator() {}
indirect_iterator(Iterator iter)
: super_t(iter) {}
template <
class Iterator2, class Value2, class Category2
, class Reference2, class Difference2
>
indirect_iterator(
indirect_iterator<
Iterator2, Value2, Category2, Reference2, Difference2
> const& y
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0
)
: super_t(y.base())
{}
private:
typename super_t::reference dereference() const
{
# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
return const_cast<super_t::reference>(**this->base());
# else
return **this->base();
# endif
}
};
template <class Iter>
inline
indirect_iterator<Iter> make_indirect_iterator(Iter x)
{
return indirect_iterator<Iter>(x);
}
template <class Traits, class Iter>
inline
indirect_iterator<Iter,Traits> make_indirect_iterator(Iter x, Traits* = 0)
{
return indirect_iterator<Iter, Traits>(x);
}
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_INDIRECT_ITERATOR_23022003THW_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_INTEROPERABLE_23022003THW_HPP
# define BOOST_INTEROPERABLE_23022003THW_HPP
# include <boost/mpl/bool.hpp>
# include <boost/mpl/or.hpp>
# include <boost/type_traits/is_convertible.hpp>
# include <boost/iterator/detail/config_def.hpp> // must appear last
namespace boost
{
//
// Meta function that determines whether two
// iterator types are considered interoperable.
//
// Two iterator types A,B are considered interoperable if either
// A is convertible to B or vice versa.
// This interoperability definition is in sync with the
// standards requirements on constant/mutable container
// iterators (23.1 [lib.container.requirements]).
//
// For compilers that don't support is_convertible
// is_interoperable gives false positives. See comments
// on operator implementation for consequences.
//
template <typename A, typename B>
struct is_interoperable
# ifdef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
: mpl::true_
# else
: mpl::or_<
is_convertible< A, B >
, is_convertible< B, A > >
# endif
{
};
} // namespace boost
# include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_INTEROPERABLE_23022003THW_HPP

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// Copyright David Abrahams 2003. Use, modification and distribution is
// subject to 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)
#ifndef IS_LVALUE_ITERATOR_DWA2003112_HPP
# define IS_LVALUE_ITERATOR_DWA2003112_HPP
#include <boost/iterator.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/detail/iterator.hpp>
#include <boost/iterator/detail/any_conversion_eater.hpp>
// should be the last #includes
#include <boost/type_traits/detail/bool_trait_def.hpp>
#include <boost/iterator/detail/config_def.hpp>
#ifndef BOOST_NO_IS_CONVERTIBLE
namespace boost {
namespace detail
{
#ifndef BOOST_NO_LVALUE_RETURN_DETECTION
// Calling lvalue_preserver( <expression>, 0 ) returns a reference
// to the expression's result if <expression> is an lvalue, or
// not_an_lvalue() otherwise.
struct not_an_lvalue {};
template <class T>
T& lvalue_preserver(T&, int);
template <class U>
not_an_lvalue lvalue_preserver(U const&, ...);
# define BOOST_LVALUE_PRESERVER(expr) lvalue_preserver(expr,0)
#else
# define BOOST_LVALUE_PRESERVER(expr) expr
#endif
// Guts of is_lvalue_iterator. Value is the iterator's value_type
// and the result is computed in the nested rebind template.
template <class Value>
struct is_lvalue_iterator_impl
{
// Eat implicit conversions so we don't report true for things
// convertible to Value const&
struct conversion_eater
{
conversion_eater(Value&);
};
static char tester(conversion_eater, int);
static char (& tester(any_conversion_eater, ...) )[2];
template <class It>
struct rebind
{
static It& x;
BOOST_STATIC_CONSTANT(
bool
, value = (
sizeof(
is_lvalue_iterator_impl<Value>::tester(
BOOST_LVALUE_PRESERVER(*x), 0
)
) == 1
)
);
};
};
#undef BOOST_LVALUE_PRESERVER
//
// void specializations to handle std input and output iterators
//
template <>
struct is_lvalue_iterator_impl<void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
template <>
struct is_lvalue_iterator_impl<const void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_lvalue_iterator_impl<volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_lvalue_iterator_impl<const volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#endif
//
// This level of dispatching is required for Borland. We might save
// an instantiation by removing it for others.
//
template <class It>
struct is_readable_lvalue_iterator_impl
: is_lvalue_iterator_impl<
BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<It>::value_type const
>::template rebind<It>
{};
template <class It>
struct is_non_const_lvalue_iterator_impl
: is_lvalue_iterator_impl<
BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<It>::value_type
>::template rebind<It>
{};
} // namespace detail
// Define the trait with full mpl lambda capability and various broken
// compiler workarounds
BOOST_TT_AUX_BOOL_TRAIT_DEF1(
is_lvalue_iterator,T,::boost::detail::is_readable_lvalue_iterator_impl<T>::value)
BOOST_TT_AUX_BOOL_TRAIT_DEF1(
is_non_const_lvalue_iterator,T,::boost::detail::is_non_const_lvalue_iterator_impl<T>::value)
} // namespace boost
#endif
#include <boost/iterator/detail/config_undef.hpp>
#include <boost/type_traits/detail/bool_trait_undef.hpp>
#endif // IS_LVALUE_ITERATOR_DWA2003112_HPP

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// Copyright David Abrahams 2003. Use, modification and distribution is
// subject to 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)
#ifndef IS_READABLE_ITERATOR_DWA2003112_HPP
# define IS_READABLE_ITERATOR_DWA2003112_HPP
#include <boost/mpl/bool.hpp>
#include <boost/detail/iterator.hpp>
#include <boost/type_traits/detail/bool_trait_def.hpp>
#include <boost/iterator/detail/any_conversion_eater.hpp>
// should be the last #include
#include <boost/iterator/detail/config_def.hpp>
#ifndef BOOST_NO_IS_CONVERTIBLE
namespace boost {
namespace detail
{
// Guts of is_readable_iterator. Value is the iterator's value_type
// and the result is computed in the nested rebind template.
template <class Value>
struct is_readable_iterator_impl
{
static char tester(Value&, int);
static char (& tester(any_conversion_eater, ...) )[2];
template <class It>
struct rebind
{
static It& x;
BOOST_STATIC_CONSTANT(
bool
, value = (
sizeof(
is_readable_iterator_impl<Value>::tester(*x, 1)
) == 1
)
);
};
};
#undef BOOST_READABLE_PRESERVER
//
// void specializations to handle std input and output iterators
//
template <>
struct is_readable_iterator_impl<void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
template <>
struct is_readable_iterator_impl<const void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_readable_iterator_impl<volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
template <>
struct is_readable_iterator_impl<const volatile void>
{
template <class It>
struct rebind : boost::mpl::false_
{};
};
#endif
//
// This level of dispatching is required for Borland. We might save
// an instantiation by removing it for others.
//
template <class It>
struct is_readable_iterator_impl2
: is_readable_iterator_impl<
BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<It>::value_type const
>::template rebind<It>
{};
} // namespace detail
// Define the trait with full mpl lambda capability and various broken
// compiler workarounds
BOOST_TT_AUX_BOOL_TRAIT_DEF1(
is_readable_iterator,T,::boost::detail::is_readable_iterator_impl2<T>::value)
} // namespace boost
#endif
#include <boost/iterator/detail/config_undef.hpp>
#endif // IS_READABLE_ITERATOR_DWA2003112_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_ITERATOR_ADAPTOR_23022003THW_HPP
#define BOOST_ITERATOR_ADAPTOR_23022003THW_HPP
#include <boost/static_assert.hpp>
#include <boost/iterator.hpp>
#include <boost/detail/iterator.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <boost/iterator/detail/enable_if.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/or.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_convertible.hpp>
#ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
# include <boost/type_traits/remove_reference.hpp>
#else
# include <boost/type_traits/add_reference.hpp>
#endif
#include <boost/iterator/detail/config_def.hpp>
#include <boost/iterator/iterator_traits.hpp>
namespace boost
{
// Used as a default template argument internally, merely to
// indicate "use the default", this can also be passed by users
// explicitly in order to specify that the default should be used.
struct use_default;
# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
// the incompleteness of use_default causes massive problems for
// is_convertible (naturally). This workaround is fortunately not
// needed for vc6/vc7.
template<class To>
struct is_convertible<use_default,To>
: mpl::false_ {};
# endif
namespace detail
{
//
// Result type used in enable_if_convertible meta function.
// This can be an incomplete type, as only pointers to
// enable_if_convertible< ... >::type are used.
// We could have used void for this, but conversion to
// void* is just to easy.
//
struct enable_type;
}
//
// enable_if for use in adapted iterators constructors.
//
// In order to provide interoperability between adapted constant and
// mutable iterators, adapted iterators will usually provide templated
// conversion constructors of the following form
//
// template <class BaseIterator>
// class adapted_iterator :
// public iterator_adaptor< adapted_iterator<Iterator>, Iterator >
// {
// public:
//
// ...
//
// template <class OtherIterator>
// adapted_iterator(
// OtherIterator const& it
// , typename enable_if_convertible<OtherIterator, Iterator>::type* = 0);
//
// ...
// };
//
// enable_if_convertible is used to remove those overloads from the overload
// set that cannot be instantiated. For all practical purposes only overloads
// for constant/mutable interaction will remain. This has the advantage that
// meta functions like boost::is_convertible do not return false positives,
// as they can only look at the signature of the conversion constructor
// and not at the actual instantiation.
//
// enable_if_interoperable can be safely used in user code. It falls back to
// always enabled for compilers that don't support enable_if or is_convertible.
// There is no need for compiler specific workarounds in user code.
//
// The operators implementation relies on boost::is_convertible not returning
// false positives for user/library defined iterator types. See comments
// on operator implementation for consequences.
//
# if defined(BOOST_NO_IS_CONVERTIBLE) || defined(BOOST_NO_SFINAE)
template <class From, class To>
struct enable_if_convertible
{
typedef detail::enable_type type;
};
# elif BOOST_WORKAROUND(_MSC_FULL_VER, BOOST_TESTED_AT(13102292)) && BOOST_MSVC > 1300
// For some reason vc7.1 needs us to "cut off" instantiation
// of is_convertible in a few cases.
template<typename From, typename To>
struct enable_if_convertible
: iterators::enable_if<
mpl::or_<
is_same<From,To>
, is_convertible<From, To>
>
, detail::enable_type
>
{};
# else
template<typename From, typename To>
struct enable_if_convertible
: iterators::enable_if<
is_convertible<From, To>
, detail::enable_type
>
{};
# endif
//
// Default template argument handling for iterator_adaptor
//
namespace detail
{
// If T is use_default, return the result of invoking
// DefaultNullaryFn, otherwise return T.
template <class T, class DefaultNullaryFn>
struct ia_dflt_help
: mpl::apply_if<
is_same<T, use_default>
, DefaultNullaryFn
, mpl::identity<T>
>
{
};
// A metafunction which computes an iterator_adaptor's base class,
// a specialization of iterator_facade.
template <
class Derived
, class Base
, class Value
, class Traversal
, class Reference
, class Difference
>
struct iterator_adaptor_base
{
typedef iterator_facade<
Derived
# ifdef BOOST_ITERATOR_REF_CONSTNESS_KILLS_WRITABILITY
, typename detail::ia_dflt_help<
Value
, mpl::apply_if<
is_same<Reference,use_default>
, iterator_value<Base>
, remove_reference<Reference>
>
>::type
# else
, typename detail::ia_dflt_help<
Value, iterator_value<Base>
>::type
# endif
, typename detail::ia_dflt_help<
Traversal
, iterator_traversal<Base>
>::type
, typename detail::ia_dflt_help<
Reference
, mpl::apply_if<
is_same<Value,use_default>
, iterator_reference<Base>
, add_reference<Value>
>
>::type
, typename detail::ia_dflt_help<
Difference, iterator_difference<Base>
>::type
>
type;
};
template <class T> int static_assert_convertible_to(T);
}
//
// Iterator Adaptor
//
// The parameter ordering changed slightly with respect to former
// versions of iterator_adaptor The idea is that when the user needs
// to fiddle with the reference type it is highly likely that the
// iterator category has to be adjusted as well. Any of the
// following four template arguments may be ommitted or explicitly
// replaced by use_default.
//
// Value - if supplied, the value_type of the resulting iterator, unless
// const. If const, a conforming compiler strips constness for the
// value_type. If not supplied, iterator_traits<Base>::value_type is used
//
// Category - the traversal category of the resulting iterator. If not
// supplied, iterator_traversal<Base>::type is used.
//
// Reference - the reference type of the resulting iterator, and in
// particular, the result type of operator*(). If not supplied but
// Value is supplied, Value& is used. Otherwise
// iterator_traits<Base>::reference is used.
//
// Difference - the difference_type of the resulting iterator. If not
// supplied, iterator_traits<Base>::difference_type is used.
//
template <
class Derived
, class Base
, class Value = use_default
, class Traversal = use_default
, class Reference = use_default
, class Difference = use_default
>
class iterator_adaptor
: public detail::iterator_adaptor_base<
Derived, Base, Value, Traversal, Reference, Difference
>::type
{
friend class iterator_core_access;
protected:
typedef typename detail::iterator_adaptor_base<
Derived, Base, Value, Traversal, Reference, Difference
>::type super_t;
public:
iterator_adaptor() {}
explicit iterator_adaptor(Base const &iter)
: m_iterator(iter)
{
}
Base const& base() const
{ return m_iterator; }
protected:
// for convenience in derived classes
typedef iterator_adaptor<Derived,Base,Value,Traversal,Reference,Difference> iterator_adaptor_;
//
// lvalue access to the Base object for Derived
//
Base const& base_reference() const
{ return m_iterator; }
Base& base_reference()
{ return m_iterator; }
private:
//
// Core iterator interface for iterator_facade. This is private
// to prevent temptation for Derived classes to use it, which
// will often result in an error. Derived classes should use
// base_reference(), above, to get direct access to m_iterator.
//
typename super_t::reference dereference() const
{ return *m_iterator; }
template <
class OtherDerived, class OtherIterator, class V, class C, class R, class D
>
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const
{
// Maybe readd with same_distance
// BOOST_STATIC_ASSERT(
// (detail::same_category_and_difference<Derived,OtherDerived>::value)
// );
return m_iterator == x.base();
}
typedef typename iterator_category_to_traversal<
typename super_t::iterator_category
>::type my_traversal;
# define BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(cat) \
typedef int assertion[sizeof(detail::static_assert_convertible_to<cat>(my_traversal()))];
// BOOST_STATIC_ASSERT((is_convertible<my_traversal,cat>::value));
void advance(typename super_t::difference_type n)
{
BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(random_access_traversal_tag)
m_iterator += n;
}
void increment() { ++m_iterator; }
void decrement()
{
BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(bidirectional_traversal_tag)
--m_iterator;
}
template <
class OtherDerived, class OtherIterator, class V, class C, class R, class D
>
typename super_t::difference_type distance_to(
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const
{
BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL(random_access_traversal_tag)
// Maybe readd with same_distance
// BOOST_STATIC_ASSERT(
// (detail::same_category_and_difference<Derived,OtherDerived>::value)
// );
return y.base() - m_iterator;
}
# undef BOOST_ITERATOR_ADAPTOR_ASSERT_TRAVERSAL
private: // data members
Base m_iterator;
};
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ITERATOR_ADAPTOR_23022003THW_HPP

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// (C) Copyright Jeremy Siek 2002. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_ITERATOR_ARCHETYPES_HPP
#define BOOST_ITERATOR_ARCHETYPES_HPP
#include <boost/iterator/iterator_categories.hpp>
#include <boost/operators.hpp>
#include <boost/static_assert.hpp>
#include <boost/iterator.hpp>
#include <boost/iterator/detail/facade_iterator_category.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_cv.hpp>
#include <boost/concept_archetype.hpp>
#include <boost/mpl/aux_/msvc_eti_base.hpp>
#include <boost/mpl/bitand.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/equal_to.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/apply_if.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/identity.hpp>
#include <cstddef>
namespace boost {
template <class Value, class AccessCategory>
struct access_archetype;
template <class Derived, class Value, class AccessCategory, class TraversalCategory>
struct traversal_archetype;
namespace iterator_archetypes
{
enum {
readable_iterator_bit = 1
, writable_iterator_bit = 2
, swappable_iterator_bit = 4
, lvalue_iterator_bit = 8
};
// Not quite tags, since dispatching wouldn't work.
typedef mpl::int_<readable_iterator_bit>::type readable_iterator_t;
typedef mpl::int_<writable_iterator_bit>::type writable_iterator_t;
typedef mpl::int_<
(readable_iterator_bit|writable_iterator_bit)
>::type readable_writable_iterator_t;
typedef mpl::int_<
(readable_iterator_bit|lvalue_iterator_bit)
>::type readable_lvalue_iterator_t;
typedef mpl::int_<
(lvalue_iterator_bit|writable_iterator_bit)
>::type writable_lvalue_iterator_t;
typedef mpl::int_<swappable_iterator_bit>::type swappable_iterator_t;
typedef mpl::int_<lvalue_iterator_bit>::type lvalue_iterator_t;
template <class Derived, class Base>
struct has_access
: mpl::equal_to<
mpl::bitand_<Derived,Base>
, Base
>
{};
}
namespace detail
{
template <class T>
struct assign_proxy
{
assign_proxy& operator=(T) { return *this; }
};
template <class T>
struct read_proxy
{
operator T() { return static_object<T>::get(); }
};
template <class T>
struct read_write_proxy
: read_proxy<T> // Use to inherit from assign_proxy, but that doesn't work. -JGS
{
read_write_proxy& operator=(T) { return *this; }
};
template <class T>
struct arrow_proxy
{
T const* operator->() const { return 0; }
};
struct no_operator_brackets {};
template <class ValueType>
struct readable_operator_brackets
{
read_proxy<ValueType> operator[](std::ptrdiff_t n) const { return read_proxy<ValueType>(); }
};
template <class ValueType>
struct writable_operator_brackets
{
read_write_proxy<ValueType> operator[](std::ptrdiff_t n) const { return read_write_proxy<ValueType>(); }
};
template <class Value, class AccessCategory, class TraversalCategory>
struct operator_brackets
: mpl::aux::msvc_eti_base<
typename mpl::apply_if<
is_convertible<TraversalCategory, random_access_traversal_tag>
, mpl::apply_if<
iterator_archetypes::has_access<
AccessCategory
, iterator_archetypes::writable_iterator_t
>
, mpl::identity<writable_operator_brackets<Value> >
, mpl::if_<
iterator_archetypes::has_access<
AccessCategory
, iterator_archetypes::readable_iterator_t
>
, readable_operator_brackets<Value>
, no_operator_brackets
>
>
, mpl::identity<no_operator_brackets>
>::type
>::type
{};
template <class TraversalCategory>
struct traversal_archetype_impl
{
template <class Derived,class Value> struct archetype;
};
// Constructor argument for those iterators that
// are not default constructible
struct ctor_arg {};
template <class Derived, class Value, class TraversalCategory>
struct traversal_archetype_
: mpl::aux::msvc_eti_base<
typename traversal_archetype_impl<TraversalCategory>::template archetype<Derived,Value>
>::type
{
typedef typename
traversal_archetype_impl<TraversalCategory>::template archetype<Derived,Value>
base;
traversal_archetype_() {}
traversal_archetype_(ctor_arg arg)
: base(arg)
{}
};
template <>
struct traversal_archetype_impl<incrementable_traversal_tag>
{
template<class Derived, class Value>
struct archetype
{
explicit archetype(ctor_arg) {}
struct bogus { }; // This use to be void, but that causes trouble for iterator_facade. Need more research. -JGS
typedef bogus difference_type;
Derived& operator++() { return (Derived&)static_object<Derived>::get(); }
Derived operator++(int) const { return (Derived&)static_object<Derived>::get(); }
};
};
template <>
struct traversal_archetype_impl<single_pass_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public equality_comparable< traversal_archetype_<Derived, Value, single_pass_traversal_tag> >,
public traversal_archetype_<Derived, Value, incrementable_traversal_tag>
{
explicit archetype(ctor_arg arg)
: traversal_archetype_<Derived, Value, incrementable_traversal_tag>(arg)
{}
};
};
template <class Derived, class Value>
bool operator==(traversal_archetype_<Derived, Value, single_pass_traversal_tag> const&,
traversal_archetype_<Derived, Value, single_pass_traversal_tag> const&) { return true; }
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
// doesn't seem to pick up != from equality_comparable
template <class Derived, class Value>
bool operator!=(traversal_archetype_<Derived, Value, single_pass_traversal_tag> const&,
traversal_archetype_<Derived, Value, single_pass_traversal_tag> const&) { return true; }
#endif
template <>
struct traversal_archetype_impl<forward_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public traversal_archetype_<Derived, Value, single_pass_traversal_tag>
{
archetype()
: traversal_archetype_<Derived, Value, single_pass_traversal_tag>(ctor_arg())
{}
typedef std::ptrdiff_t difference_type;
};
};
template <>
struct traversal_archetype_impl<bidirectional_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public traversal_archetype_<Derived, Value, forward_traversal_tag>
{
Derived& operator--() { return static_object<Derived>::get(); }
Derived operator--(int) const { return static_object<Derived>::get(); }
};
};
template <>
struct traversal_archetype_impl<random_access_traversal_tag>
{
template<class Derived, class Value>
struct archetype
: public partially_ordered<traversal_archetype_<Derived, Value, random_access_traversal_tag> >,
public traversal_archetype_<Derived, Value, bidirectional_traversal_tag>
{
Derived& operator+=(std::ptrdiff_t) { return static_object<Derived>::get(); }
Derived& operator-=(std::ptrdiff_t) { return static_object<Derived>::get(); }
};
};
template <class Derived, class Value>
Derived& operator+(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
std::ptrdiff_t) { return static_object<Derived>::get(); }
template <class Derived, class Value>
Derived& operator+(std::ptrdiff_t,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return static_object<Derived>::get(); }
template <class Derived, class Value>
Derived& operator-(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
std::ptrdiff_t)
{ return static_object<Derived>::get(); }
template <class Derived, class Value>
std::ptrdiff_t operator-(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return 0; }
template <class Derived, class Value>
bool operator<(traversal_archetype_<Derived, Value, random_access_traversal_tag> const&,
traversal_archetype_<Derived, Value, random_access_traversal_tag> const&)
{ return true; }
struct bogus_type;
template <class Value>
struct convertible_type
: mpl::if_< is_const<Value>,
typename remove_const<Value>::type,
bogus_type >
{};
} // namespace detail
template <class> struct undefined;
template <class AccessCategory>
struct iterator_access_archetype_impl
{
template <class Value> struct archetype;
};
template <class Value, class AccessCategory>
struct iterator_access_archetype
: mpl::aux::msvc_eti_base<
typename iterator_access_archetype_impl<
AccessCategory
>::template archetype<Value>
>::type
{
};
template <>
struct iterator_access_archetype_impl<
iterator_archetypes::readable_iterator_t
>
{
template <class Value>
struct archetype
{
typedef typename remove_cv<Value>::type value_type;
typedef Value reference;
typedef Value* pointer;
value_type operator*() const { return static_object<value_type>::get(); }
detail::arrow_proxy<Value> operator->() const { return detail::arrow_proxy<Value>(); }
};
};
template <>
struct iterator_access_archetype_impl<
iterator_archetypes::writable_iterator_t
>
{
template <class Value>
struct archetype
{
# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
BOOST_STATIC_ASSERT(!is_const<Value>::value);
# endif
typedef void value_type;
typedef void reference;
typedef void pointer;
detail::assign_proxy<Value> operator*() const { return detail::assign_proxy<Value>(); }
};
};
template <>
struct iterator_access_archetype_impl<
iterator_archetypes::readable_writable_iterator_t
>
{
template <class Value>
struct archetype
: public virtual iterator_access_archetype<
Value, iterator_archetypes::readable_iterator_t
>
{
typedef detail::read_write_proxy<Value> reference;
detail::read_write_proxy<Value> operator*() const { return detail::read_write_proxy<Value>(); }
};
};
template <>
struct iterator_access_archetype_impl<iterator_archetypes::readable_lvalue_iterator_t>
{
template <class Value>
struct archetype
: public virtual iterator_access_archetype<
Value, iterator_archetypes::readable_iterator_t
>
{
typedef Value& reference;
Value& operator*() const { return static_object<Value>::get(); }
Value* operator->() const { return 0; }
};
};
template <>
struct iterator_access_archetype_impl<iterator_archetypes::writable_lvalue_iterator_t>
{
template <class Value>
struct archetype
: public virtual iterator_access_archetype<
Value, iterator_archetypes::readable_lvalue_iterator_t
>
{
# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
BOOST_STATIC_ASSERT((!is_const<Value>::value));
# endif
};
};
template <class Value, class AccessCategory, class TraversalCategory>
struct iterator_archetype;
template <class Value, class AccessCategory, class TraversalCategory>
struct traversal_archetype_base
: detail::operator_brackets<
typename remove_cv<Value>::type
, AccessCategory
, TraversalCategory
>
, detail::traversal_archetype_<
iterator_archetype<Value, AccessCategory, TraversalCategory>
, Value
, TraversalCategory
>
{
};
namespace detail
{
template <class Value, class AccessCategory, class TraversalCategory>
struct iterator_archetype_base
: iterator_access_archetype<Value, AccessCategory>
, traversal_archetype_base<Value, AccessCategory, TraversalCategory>
{
typedef iterator_access_archetype<Value, AccessCategory> access;
typedef typename detail::facade_iterator_category<
TraversalCategory
, typename mpl::apply_if<
iterator_archetypes::has_access<
AccessCategory, iterator_archetypes::writable_iterator_t
>
, remove_const<Value>
, add_const<Value>
>::type
, typename access::reference
>::type iterator_category;
// Needed for some broken libraries (see below)
typedef boost::iterator<
iterator_category
, Value
, typename traversal_archetype_base<
Value, AccessCategory, TraversalCategory
>::difference_type
, typename access::pointer
, typename access::reference
> workaround_iterator_base;
};
}
template <class Value, class AccessCategory, class TraversalCategory>
struct iterator_archetype
: public detail::iterator_archetype_base<Value, AccessCategory, TraversalCategory>
// These broken libraries require derivation from std::iterator
// (or related magic) in order to handle iter_swap and other
// iterator operations
# if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, < 310) \
|| BOOST_WORKAROUND(_RWSTD_VER, BOOST_TESTED_AT(0x20101))
, public detail::iterator_archetype_base<
Value, AccessCategory, TraversalCategory
>::workaround_iterator_base
# endif
{
// Derivation from std::iterator above caused references to nested
// types to be ambiguous, so now we have to redeclare them all
// here.
# if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, < 310) \
|| BOOST_WORKAROUND(_RWSTD_VER, BOOST_TESTED_AT(0x20101))
typedef detail::iterator_archetype_base<
Value,AccessCategory,TraversalCategory
> base;
typedef typename base::value_type value_type;
typedef typename base::reference reference;
typedef typename base::pointer pointer;
typedef typename base::difference_type difference_type;
typedef typename base::iterator_category iterator_category;
# endif
iterator_archetype() { }
iterator_archetype(iterator_archetype const& x)
: detail::iterator_archetype_base<
Value
, AccessCategory
, TraversalCategory
>(x)
{}
iterator_archetype& operator=(iterator_archetype const&)
{ return *this; }
# if 0
// Optional conversion from mutable
iterator_archetype(
iterator_archetype<
typename detail::convertible_type<Value>::type
, AccessCategory
, TraversalCategory> const&
);
# endif
};
} // namespace boost
#endif // BOOST_ITERATOR_ARCHETYPES_HPP

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// (C) Copyright Jeremy Siek 2002. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_ITERATOR_CATEGORIES_HPP
# define BOOST_ITERATOR_CATEGORIES_HPP
# include <boost/config.hpp>
# include <boost/detail/iterator.hpp>
# include <boost/iterator/detail/config_def.hpp>
# include <boost/detail/workaround.hpp>
# include <boost/mpl/apply_if.hpp>
# include <boost/mpl/identity.hpp>
# include <boost/mpl/placeholders.hpp>
# include <boost/mpl/aux_/lambda_support.hpp>
# include <boost/type_traits/is_convertible.hpp>
# include <boost/static_assert.hpp>
namespace boost {
//
// Traversal Categories
//
struct no_traversal_tag {};
struct incrementable_traversal_tag
: no_traversal_tag
{
// incrementable_traversal_tag() {}
// incrementable_traversal_tag(std::output_iterator_tag const&) {};
};
struct single_pass_traversal_tag
: incrementable_traversal_tag
{
// single_pass_traversal_tag() {}
// single_pass_traversal_tag(std::input_iterator_tag const&) {};
};
struct forward_traversal_tag
: single_pass_traversal_tag
{
// forward_traversal_tag() {}
// forward_traversal_tag(std::forward_iterator_tag const&) {};
};
struct bidirectional_traversal_tag
: forward_traversal_tag
{
// bidirectional_traversal_tag() {};
// bidirectional_traversal_tag(std::bidirectional_iterator_tag const&) {};
};
struct random_access_traversal_tag
: bidirectional_traversal_tag
{
// random_access_traversal_tag() {};
// random_access_traversal_tag(std::random_access_iterator_tag const&) {};
};
namespace detail
{
//
// Convert a "strictly old-style" iterator category to a traversal
// tag. This is broken out into a separate metafunction to reduce
// the cost of instantiating iterator_category_to_traversal, below,
// for new-style types.
//
template <class Cat>
struct old_category_to_traversal
: mpl::apply_if<
is_convertible<Cat,std::random_access_iterator_tag>
, mpl::identity<random_access_traversal_tag>
, mpl::apply_if<
is_convertible<Cat,std::bidirectional_iterator_tag>
, mpl::identity<bidirectional_traversal_tag>
, mpl::apply_if<
is_convertible<Cat,std::forward_iterator_tag>
, mpl::identity<forward_traversal_tag>
, mpl::apply_if<
is_convertible<Cat,std::input_iterator_tag>
, mpl::identity<single_pass_traversal_tag>
, mpl::apply_if<
is_convertible<Cat,std::output_iterator_tag>
, mpl::identity<incrementable_traversal_tag>
, void
>
>
>
>
>
{};
# if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
template <>
struct old_category_to_traversal<int>
{
typedef int type;
};
# endif
template <class Traversal>
struct pure_traversal_tag
: mpl::apply_if<
is_convertible<Traversal,random_access_traversal_tag>
, mpl::identity<random_access_traversal_tag>
, mpl::apply_if<
is_convertible<Traversal,bidirectional_traversal_tag>
, mpl::identity<bidirectional_traversal_tag>
, mpl::apply_if<
is_convertible<Traversal,forward_traversal_tag>
, mpl::identity<forward_traversal_tag>
, mpl::apply_if<
is_convertible<Traversal,single_pass_traversal_tag>
, mpl::identity<single_pass_traversal_tag>
, mpl::apply_if<
is_convertible<Traversal,incrementable_traversal_tag>
, mpl::identity<incrementable_traversal_tag>
, void
>
>
>
>
>
{
};
# if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
template <>
struct pure_traversal_tag<int>
{
typedef int type;
};
# endif
} // namespace detail
//
// Convert an iterator category into a traversal tag
//
template <class Cat>
struct iterator_category_to_traversal
: mpl::apply_if< // if already convertible to a traversal tag, we're done.
is_convertible<Cat,incrementable_traversal_tag>
, mpl::identity<Cat>
, detail::old_category_to_traversal<Cat>
>
{};
// Trait to get an iterator's traversal category
template <class Iterator = mpl::_1>
struct iterator_traversal
: iterator_category_to_traversal<
typename boost::detail::iterator_traits<Iterator>::iterator_category
>
{};
# ifdef BOOST_MPL_NO_FULL_LAMBDA_SUPPORT
// Hack because BOOST_MPL_AUX_LAMBDA_SUPPORT doesn't seem to work
// out well. Instantiating the nested apply template also
// requires instantiating iterator_traits on the
// placeholder. Instead we just specialize it as a metafunction
// class.
template <>
struct iterator_traversal<mpl::_1>
{
template <class T>
struct apply : iterator_traversal<T>
{};
};
template <>
struct iterator_traversal<mpl::_>
: iterator_traversal<mpl::_1>
{};
# endif
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ITERATOR_CATEGORIES_HPP

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// (C) Copyright Jeremy Siek 2002. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_ITERATOR_CONCEPTS_HPP
#define BOOST_ITERATOR_CONCEPTS_HPP
// Revision History
// 26 Apr 2003 thw
// Adapted to new iterator concepts
// 22 Nov 2002 Thomas Witt
// Added interoperable concept.
#include <boost/concept_check.hpp>
#include <boost/iterator/iterator_categories.hpp>
// Use boost::detail::iterator_traits to work around some MSVC/Dinkumware problems.
#include <boost/detail/iterator.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/or.hpp>
#include <boost/static_assert.hpp>
// Use boost/limits to work around missing limits headers on some compilers
#include <boost/limits.hpp>
#include <algorithm>
namespace boost_concepts {
// Used a different namespace here (instead of "boost") so that the
// concept descriptions do not take for granted the names in
// namespace boost.
// We use this in place of STATIC_ASSERT((is_convertible<...>))
// because some compilers (CWPro7.x) can't detect convertibility.
//
// Of course, that just gets us a different error at the moment with
// some tests, since new iterator category deduction still depends
// on convertibility detection. We might need some specializations
// to support this compiler.
template <class Target, class Source>
struct static_assert_base_and_derived
{
static_assert_base_and_derived(Target* = (Source*)0) {}
};
//===========================================================================
// Iterator Access Concepts
template <typename Iterator>
class ReadableIteratorConcept {
public:
typedef BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<Iterator>::value_type value_type;
void constraints() {
boost::function_requires< boost::AssignableConcept<Iterator> >();
boost::function_requires< boost::CopyConstructibleConcept<Iterator> >();
value_type v = *i;
boost::ignore_unused_variable_warning(v);
}
Iterator i;
};
template <
typename Iterator
, typename ValueType = BOOST_DEDUCED_TYPENAME boost::detail::iterator_traits<Iterator>::value_type
>
class WritableIteratorConcept {
public:
void constraints() {
boost::function_requires< boost::CopyConstructibleConcept<Iterator> >();
*i = v;
}
ValueType v;
Iterator i;
};
template <typename Iterator>
class SwappableIteratorConcept {
public:
void constraints() {
std::iter_swap(i1, i2);
}
Iterator i1;
Iterator i2;
};
template <typename Iterator>
class LvalueIteratorConcept
{
public:
typedef typename boost::detail::iterator_traits<Iterator>::value_type value_type;
void constraints()
{
value_type& r = const_cast<value_type&>(*i);
boost::ignore_unused_variable_warning(r);
}
Iterator i;
};
//===========================================================================
// Iterator Traversal Concepts
template <typename Iterator>
class IncrementableIteratorConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
void constraints() {
boost::function_requires< boost::AssignableConcept<Iterator> >();
boost::function_requires< boost::CopyConstructibleConcept<Iterator> >();
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::incrementable_traversal_tag
>::value
));
++i;
(void)i++;
}
Iterator i;
};
template <typename Iterator>
class SinglePassIteratorConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
typedef typename boost::detail::iterator_traits<Iterator>::difference_type difference_type;
void constraints() {
boost::function_requires< IncrementableIteratorConcept<Iterator> >();
boost::function_requires< boost::EqualityComparableConcept<Iterator> >();
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::single_pass_traversal_tag
>::value
));
}
};
template <typename Iterator>
class ForwardTraversalConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
typedef typename boost::detail::iterator_traits<Iterator>::difference_type difference_type;
void constraints() {
boost::function_requires< SinglePassIteratorConcept<Iterator> >();
boost::function_requires<
boost::DefaultConstructibleConcept<Iterator> >();
typedef boost::mpl::and_<
boost::is_integral<difference_type>,
boost::mpl::bool_< std::numeric_limits<difference_type>::is_signed >
> difference_type_is_signed_integral;
BOOST_STATIC_ASSERT(difference_type_is_signed_integral::value);
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::forward_traversal_tag
>::value
));
}
};
template <typename Iterator>
class BidirectionalTraversalConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
void constraints() {
boost::function_requires< ForwardTraversalConcept<Iterator> >();
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::bidirectional_traversal_tag
>::value
));
--i;
(void)i--;
}
Iterator i;
};
template <typename Iterator>
class RandomAccessTraversalConcept {
public:
typedef typename boost::iterator_traversal<Iterator>::type traversal_category;
typedef typename boost::detail::iterator_traits<Iterator>::difference_type
difference_type;
void constraints() {
boost::function_requires< BidirectionalTraversalConcept<Iterator> >();
BOOST_STATIC_ASSERT(
(boost::is_convertible<
traversal_category
, boost::random_access_traversal_tag
>::value
));
i += n;
i = i + n;
i = n + i;
i -= n;
i = i - n;
n = i - j;
}
difference_type n;
Iterator i, j;
};
//===========================================================================
// Iterator Interoperability Concept
namespace detail
{
template <typename Iterator1, typename Iterator2>
void interop_single_pass_constraints(Iterator1 const& i1, Iterator2 const& i2)
{
bool b;
b = i1 == i2;
b = i1 != i2;
b = i2 == i1;
b = i2 != i1;
}
template <typename Iterator1, typename Iterator2>
void interop_rand_access_constraints(Iterator1 const& i1, Iterator2 const& i2,
boost::random_access_traversal_tag, boost::random_access_traversal_tag)
{
bool b;
typename boost::detail::iterator_traits<Iterator2>::difference_type n;
b = i1 < i2;
b = i1 <= i2;
b = i1 > i2;
b = i1 >= i2;
n = i1 - i2;
b = i2 < i1;
b = i2 <= i1;
b = i2 > i1;
b = i2 >= i1;
n = i2 - i1;
}
template <typename Iterator1, typename Iterator2>
void interop_rand_access_constraints(Iterator1 const& i1, Iterator2 const& i2,
boost::single_pass_traversal_tag, boost::single_pass_traversal_tag)
{ }
} // namespace detail
template <typename Iterator, typename ConstIterator>
class InteroperableIteratorConcept
{
public:
typedef typename boost::detail::pure_traversal_tag<
typename boost::iterator_traversal<
Iterator
>::type
>::type traversal_category;
typedef typename boost::detail::pure_traversal_tag<
typename boost::iterator_traversal<
ConstIterator
>::type
>::type const_traversal_category;
void constraints()
{
boost::function_requires< SinglePassIteratorConcept<Iterator> >();
boost::function_requires< SinglePassIteratorConcept<ConstIterator> >();
detail::interop_single_pass_constraints(i, ci);
detail::interop_rand_access_constraints(i, ci, traversal_category(), const_traversal_category());
ci = i;
}
Iterator i;
ConstIterator ci;
};
} // namespace boost_concepts
#endif // BOOST_ITERATOR_CONCEPTS_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_ITERATOR_FACADE_23022003THW_HPP
#define BOOST_ITERATOR_FACADE_23022003THW_HPP
#include <boost/static_assert.hpp>
#include <boost/iterator.hpp>
#include <boost/iterator/interoperable.hpp>
#include <boost/iterator/iterator_traits.hpp>
#include <boost/iterator/detail/facade_iterator_category.hpp>
#include <boost/iterator/detail/enable_if.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/add_pointer.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/type_traits/is_pod.hpp>
#include <boost/mpl/apply_if.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/or.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/always.hpp>
#include <boost/mpl/apply.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/iterator/detail/config_def.hpp> // this goes last
namespace boost
{
// This forward declaration is required for the friend declaration
// in iterator_core_access
template <class I, class V, class TC, class R, class D> class iterator_facade;
namespace detail
{
// A binary metafunction class that always returns bool. VC6
// ICEs on mpl::always<bool>, probably because of the default
// parameters.
struct always_bool2
{
template <class T, class U>
struct apply
{
typedef bool type;
};
};
//
// enable if for use in operator implementation.
//
template <
class Facade1
, class Facade2
, class Return
>
struct enable_if_interoperable
: ::boost::iterators::enable_if<
mpl::or_<
is_convertible<Facade1, Facade2>
, is_convertible<Facade2, Facade1>
>
, Return
>
{
};
//
// Generates associated types for an iterator_facade with the
// given parameters.
//
template <
class ValueParam
, class CategoryOrTraversal
, class Reference
, class Difference
>
struct iterator_facade_types
{
typedef typename facade_iterator_category<
CategoryOrTraversal, ValueParam, Reference
>::type iterator_category;
typedef typename remove_const<ValueParam>::type value_type;
typedef typename mpl::apply_if<
detail::iterator_writability_disabled<ValueParam,Reference>
, add_pointer<typename add_const<value_type>::type>
, add_pointer<value_type>
>::type pointer;
# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
&& (BOOST_WORKAROUND(_STLPORT_VERSION, BOOST_TESTED_AT(0x452)) \
|| BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, BOOST_TESTED_AT(310))) \
|| BOOST_WORKAROUND(BOOST_RWSTD_VER, BOOST_TESTED_AT(0x20101)) \
|| BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, <= 310)
// To interoperate with some broken library/compiler
// combinations, user-defined iterators must be derived from
// std::iterator. It is possible to implement a standard
// library for broken compilers without this limitation.
# define BOOST_ITERATOR_FACADE_NEEDS_ITERATOR_BASE 1
typedef
iterator<iterator_category, value_type, Difference, pointer, Reference>
base;
# endif
};
// iterators whose dereference operators reference the same value
// for all iterators into the same sequence (like many input
// iterators) need help with their postfix ++: the referenced
// value must be read and stored away before the increment occurs
// so that *a++ yields the originally referenced element and not
// the next one.
template <class Iterator>
class postfix_increment_proxy
{
typedef typename iterator_value<Iterator>::type value_type;
public:
explicit postfix_increment_proxy(Iterator const& x)
: stored_value(*x)
{}
// Returning a mutable reference allows nonsense like
// (*r++).mutate(), but it imposes fewer assumptions about the
// behavior of the value_type. In particular, recall taht
// (*r).mutate() is legal if operator* returns by value.
value_type&
operator*() const
{
return this->stored_value;
}
private:
mutable value_type stored_value;
};
//
// In general, we can't determine that such an iterator isn't
// writable -- we also need to store a copy of the old iterator so
// that it can be written into.
template <class Iterator>
class writable_postfix_increment_proxy
{
typedef typename iterator_value<Iterator>::type value_type;
public:
explicit writable_postfix_increment_proxy(Iterator const& x)
: stored_value(*x)
, stored_iterator(x)
{}
// Dereferencing must return a proxy so that both *r++ = o and
// value_type(*r++) can work. In this case, *r is the same as
// *r++, and the conversion operator below is used to ensure
// readability.
writable_postfix_increment_proxy const&
operator*() const
{
return *this;
}
// Provides readability of *r++
operator value_type&() const
{
return stored_value;
}
// Provides writability of *r++
template <class T>
T const& operator=(T const& x) const
{
*this->stored_iterator = x;
return x;
}
// This overload just in case only non-const objects are writable
template <class T>
T& operator=(T& x) const
{
*this->stored_iterator = x;
return x;
}
private:
mutable value_type stored_value;
Iterator stored_iterator;
};
# ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class Reference, class Value>
struct is_non_proxy_reference_impl
{
static Reference r;
template <class R>
static typename mpl::if_<
is_convertible<
R const volatile*
, Value const volatile*
>
, char[1]
, char[2]
>::type& helper(R const&);
BOOST_STATIC_CONSTANT(bool, value = sizeof(helper(r)) == 1);
};
template <class Reference, class Value>
struct is_non_proxy_reference
: mpl::bool_<
is_non_proxy_reference_impl<Reference, Value>::value
>
{};
# else
template <class Reference, class Value>
struct is_non_proxy_reference
: is_convertible<
typename remove_reference<Reference>::type
const volatile*
, Value const volatile*
>
{};
# endif
// A metafunction to choose the result type of postfix ++
//
// Because the C++98 input iterator requirements say that *r++ has
// type T (value_type), implementations of some standard
// algorithms like lexicographical_compare may use constructions
// like:
//
// *r++ < *s++
//
// If *r++ returns a proxy (as required if r is writable but not
// multipass), this sort of expression will fail unless the proxy
// supports the operator<. Since there are any number of such
// operations, we're not going to try to support them. Therefore,
// even if r++ returns a proxy, *r++ will only return a proxy if
// *r also returns a proxy.
template <class Iterator, class Value, class Reference, class CategoryOrTraversal>
struct postfix_increment_result
: mpl::apply_if<
mpl::and_<
// A proxy is only needed for readable iterators
is_convertible<Reference,Value>
// No multipass iterator can have values that disappear
// before positions can be re-visited
, mpl::not_<
is_convertible<
typename iterator_category_to_traversal<CategoryOrTraversal>::type
, forward_traversal_tag
>
>
>
, mpl::if_<
is_non_proxy_reference<Reference,Value>
, postfix_increment_proxy<Iterator>
, writable_postfix_increment_proxy<Iterator>
>
, mpl::identity<Iterator>
>
{};
// operator->() needs special support for input iterators to strictly meet the
// standard's requirements. If *i is not a reference type, we must still
// produce a (constant) lvalue to which a pointer can be formed. We do that by
// returning an instantiation of this special proxy class template.
template <class T>
struct operator_arrow_proxy
{
operator_arrow_proxy(T const* px) : m_value(*px) {}
const T* operator->() const { return &m_value; }
// This function is needed for MWCW and BCC, which won't call operator->
// again automatically per 13.3.1.2 para 8
operator const T*() const { return &m_value; }
T m_value;
};
// A metafunction that gets the result type for operator->. Also
// has a static function make() which builds the result from a
// Reference
template <class ValueType, class Reference, class Pointer>
struct operator_arrow_result
{
// CWPro8.3 won't accept "operator_arrow_result::type", and we
// need that type below, so metafunction forwarding would be a
// losing proposition here.
typedef typename mpl::if_<
is_reference<Reference>
, Pointer
, operator_arrow_proxy<ValueType>
>::type type;
static type make(Reference x)
{
return type(&x);
}
};
# if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
// Deal with ETI
template<>
struct operator_arrow_result<int, int, int>
{
typedef int type;
};
# endif
// A proxy return type for operator[], needed to deal with
// iterators that may invalidate referents upon destruction.
// Consider the temporary iterator in *(a + n)
template <class Iterator>
class operator_brackets_proxy
{
// Iterator is actually an iterator_facade, so we do not have to
// go through iterator_traits to access the traits.
typedef typename Iterator::reference reference;
typedef typename Iterator::value_type value_type;
public:
operator_brackets_proxy(Iterator const& iter)
: m_iter(iter)
{}
operator reference() const
{
return *m_iter;
}
operator_brackets_proxy& operator=(value_type const& val)
{
*m_iter = val;
return *this;
}
private:
Iterator m_iter;
};
// A metafunction that determines whether operator[] must return a
// proxy, or whether it can simply return a copy of the value_type.
template <class ValueType, class Reference>
struct use_operator_brackets_proxy
: mpl::not_<
mpl::and_<
// Really we want an is_copy_constructible trait here,
// but is_POD will have to suffice in the meantime.
boost::is_POD<ValueType>
, iterator_writability_disabled<ValueType,Reference>
>
>
{};
template <class Iterator, class Value, class Reference>
struct operator_brackets_result
{
typedef typename mpl::if_<
use_operator_brackets_proxy<Value,Reference>
, operator_brackets_proxy<Iterator>
, Value
>::type type;
};
template <class Iterator>
operator_brackets_proxy<Iterator> make_operator_brackets_result(Iterator const& iter, mpl::true_)
{
return operator_brackets_proxy<Iterator>(iter);
}
template <class Iterator>
typename Iterator::value_type make_operator_brackets_result(Iterator const& iter, mpl::false_)
{
return *iter;
}
struct choose_difference_type
{
template <class I1, class I2>
struct apply
:
# ifdef BOOST_NO_ONE_WAY_ITERATOR_INTEROP
iterator_difference<I1>
# elif BOOST_WORKAROUND(BOOST_MSVC, == 1200)
mpl::if_<
is_convertible<I2,I1>
, typename I1::difference_type
, typename I2::difference_type
>
# else
mpl::apply_if<
is_convertible<I2,I1>
, iterator_difference<I1>
, iterator_difference<I2>
>
# endif
{};
};
} // namespace detail
// Macros which describe the declarations of binary operators
# ifdef BOOST_NO_STRICT_ITERATOR_INTEROPERABILITY
# define BOOST_ITERATOR_FACADE_INTEROP_HEAD(prefix, op, result_type) \
template < \
class Derived1, class V1, class TC1, class R1, class D1 \
, class Derived2, class V2, class TC2, class R2, class D2 \
> \
prefix typename mpl::apply2<result_type,Derived1,Derived2>::type \
operator op( \
iterator_facade<Derived1, V1, TC1, R1, D1> const& lhs \
, iterator_facade<Derived2, V2, TC2, R2, D2> const& rhs)
# else
# define BOOST_ITERATOR_FACADE_INTEROP_HEAD(prefix, op, result_type) \
template < \
class Derived1, class V1, class TC1, class R1, class D1 \
, class Derived2, class V2, class TC2, class R2, class D2 \
> \
prefix typename detail::enable_if_interoperable< \
Derived1, Derived2 \
, typename mpl::apply2<result_type,Derived1,Derived2>::type \
>::type \
operator op( \
iterator_facade<Derived1, V1, TC1, R1, D1> const& lhs \
, iterator_facade<Derived2, V2, TC2, R2, D2> const& rhs)
# endif
# define BOOST_ITERATOR_FACADE_PLUS_HEAD(prefix,args) \
template <class Derived, class V, class TC, class R, class D> \
prefix Derived operator+ args
//
// Helper class for granting access to the iterator core interface.
//
// The simple core interface is used by iterator_facade. The core
// interface of a user/library defined iterator type should not be made public
// so that it does not clutter the public interface. Instead iterator_core_access
// should be made friend so that iterator_facade can access the core
// interface through iterator_core_access.
//
class iterator_core_access
{
# if defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) \
|| BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
// Tasteless as this may seem, making all members public allows member templates
// to work in the absence of member template friends.
public:
# else
template <class I, class V, class TC, class R, class D> friend class iterator_facade;
# define BOOST_ITERATOR_FACADE_RELATION(op) \
BOOST_ITERATOR_FACADE_INTEROP_HEAD(friend,op, detail::always_bool2);
BOOST_ITERATOR_FACADE_RELATION(==)
BOOST_ITERATOR_FACADE_RELATION(!=)
BOOST_ITERATOR_FACADE_RELATION(<)
BOOST_ITERATOR_FACADE_RELATION(>)
BOOST_ITERATOR_FACADE_RELATION(<=)
BOOST_ITERATOR_FACADE_RELATION(>=)
# undef BOOST_ITERATOR_FACADE_RELATION
BOOST_ITERATOR_FACADE_INTEROP_HEAD(
friend, -, detail::choose_difference_type)
;
BOOST_ITERATOR_FACADE_PLUS_HEAD(
friend
, (iterator_facade<Derived, V, TC, R, D> const&
, typename Derived::difference_type)
)
;
BOOST_ITERATOR_FACADE_PLUS_HEAD(
friend
, (typename Derived::difference_type
, iterator_facade<Derived, V, TC, R, D> const&)
)
;
# endif
template <class Facade>
static typename Facade::reference dereference(Facade const& f)
{
return f.dereference();
}
template <class Facade>
static void increment(Facade& f)
{
f.increment();
}
template <class Facade>
static void decrement(Facade& f)
{
f.decrement();
}
template <class Facade1, class Facade2>
static bool equal(Facade1 const& f1, Facade2 const& f2, mpl::true_)
{
return f1.equal(f2);
}
template <class Facade1, class Facade2>
static bool equal(Facade1 const& f1, Facade2 const& f2, mpl::false_)
{
return f2.equal(f1);
}
template <class Facade>
static void advance(Facade& f, typename Facade::difference_type n)
{
f.advance(n);
}
template <class Facade1, class Facade2>
static typename Facade1::difference_type distance_from(
Facade1 const& f1, Facade2 const& f2, mpl::true_)
{
return -f1.distance_to(f2);
}
template <class Facade1, class Facade2>
static typename Facade2::difference_type distance_from(
Facade1 const& f1, Facade2 const& f2, mpl::false_)
{
return f2.distance_to(f1);
}
//
// Curiously Recurring Template interface.
//
template <class I, class V, class TC, class R, class D>
static I& derived(iterator_facade<I,V,TC,R,D>& facade)
{
return *static_cast<I*>(&facade);
}
template <class I, class V, class TC, class R, class D>
static I const& derived(iterator_facade<I,V,TC,R,D> const& facade)
{
return *static_cast<I const*>(&facade);
}
private:
// objects of this class are useless
iterator_core_access(); //undefined
};
//
// iterator_facade - use as a public base class for defining new
// standard-conforming iterators.
//
template <
class Derived // The derived iterator type being constructed
, class Value
, class CategoryOrTraversal
, class Reference = Value&
, class Difference = std::ptrdiff_t
>
class iterator_facade
# ifdef BOOST_ITERATOR_FACADE_NEEDS_ITERATOR_BASE
: public detail::iterator_facade_types<
Value, CategoryOrTraversal, Reference, Difference
>::base
# undef BOOST_ITERATOR_FACADE_NEEDS_ITERATOR_BASE
# endif
{
private:
//
// Curiously Recurring Template interface.
//
Derived& derived()
{
return *static_cast<Derived*>(this);
}
Derived const& derived() const
{
return *static_cast<Derived const*>(this);
}
typedef detail::iterator_facade_types<
Value, CategoryOrTraversal, Reference, Difference
> associated_types;
protected:
// For use by derived classes
typedef iterator_facade<Derived,Value,Reference,Difference> iterator_facade_;
public:
typedef typename associated_types::value_type value_type;
typedef Reference reference;
typedef Difference difference_type;
typedef typename associated_types::pointer pointer;
typedef typename associated_types::iterator_category iterator_category;
reference operator*() const
{
return iterator_core_access::dereference(this->derived());
}
typename detail::operator_arrow_result<
value_type
, reference
, pointer
>::type
operator->() const
{
return detail::operator_arrow_result<
value_type
, reference
, pointer
>::make(*this->derived());
}
typename detail::operator_brackets_result<Derived,Value,reference>::type
operator[](difference_type n) const
{
typedef detail::use_operator_brackets_proxy<Value,Reference> use_proxy;
return detail::make_operator_brackets_result<Derived>(
this->derived() + n
, use_proxy()
);
}
Derived& operator++()
{
iterator_core_access::increment(this->derived());
return this->derived();
}
# if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
typename detail::postfix_increment_result<Derived,Value,Reference,CategoryOrTraversal>::type
operator++(int)
{
typename detail::postfix_increment_result<Derived,Value,Reference,CategoryOrTraversal>::type
tmp(this->derived());
++*this;
return tmp;
}
# endif
Derived& operator--()
{
iterator_core_access::decrement(this->derived());
return this->derived();
}
Derived operator--(int)
{
Derived tmp(this->derived());
--*this;
return tmp;
}
Derived& operator+=(difference_type n)
{
iterator_core_access::advance(this->derived(), n);
return this->derived();
}
Derived& operator-=(difference_type n)
{
iterator_core_access::advance(this->derived(), -n);
return this->derived();
}
Derived operator-(difference_type x) const
{
Derived result(this->derived());
return result -= x;
}
# if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
// There appears to be a bug which trashes the data of classes
// derived from iterator_facade when they are assigned unless we
// define this assignment operator. This bug is only revealed
// (so far) in STLPort debug mode, but it's clearly a codegen
// problem so we apply the workaround for all MSVC6.
iterator_facade& operator=(iterator_facade const&)
{
return *this;
}
# endif
};
# if !BOOST_WORKAROUND(BOOST_MSVC, == 1200)
template <class I, class V, class TC, class R, class D>
typename detail::postfix_increment_result<I,V,R,TC>::type
operator++(
iterator_facade<I,V,TC,R,D>& i
, int
)
{
typename detail::postfix_increment_result<I,V,R,TC>::type
tmp(*static_cast<I*>(&i));
++i;
return tmp;
}
# endif
//
// Comparison operator implementation. The library supplied operators
// enables the user to provide fully interoperable constant/mutable
// iterator types. I.e. the library provides all operators
// for all mutable/constant iterator combinations.
//
// Note though that this kind of interoperability for constant/mutable
// iterators is not required by the standard for container iterators.
// All the standard asks for is a conversion mutable -> constant.
// Most standard library implementations nowadays provide fully interoperable
// iterator implementations, but there are still heavily used implementations
// that do not provide them. (Actually it's even worse, they do not provide
// them for only a few iterators.)
//
// ?? Maybe a BOOST_ITERATOR_NO_FULL_INTEROPERABILITY macro should
// enable the user to turn off mixed type operators
//
// The library takes care to provide only the right operator overloads.
// I.e.
//
// bool operator==(Iterator, Iterator);
// bool operator==(ConstIterator, Iterator);
// bool operator==(Iterator, ConstIterator);
// bool operator==(ConstIterator, ConstIterator);
//
// ...
//
// In order to do so it uses c++ idioms that are not yet widely supported
// by current compiler releases. The library is designed to degrade gracefully
// in the face of compiler deficiencies. In general compiler
// deficiencies result in less strict error checking and more obscure
// error messages, functionality is not affected.
//
// For full operation compiler support for "Substitution Failure Is Not An Error"
// (aka. enable_if) and boost::is_convertible is required.
//
// The following problems occur if support is lacking.
//
// Pseudo code
//
// ---------------
// AdaptorA<Iterator1> a1;
// AdaptorA<Iterator2> a2;
//
// // This will result in a no such overload error in full operation
// // If enable_if or is_convertible is not supported
// // The instantiation will fail with an error hopefully indicating that
// // there is no operator== for Iterator1, Iterator2
// // The same will happen if no enable_if is used to remove
// // false overloads from the templated conversion constructor
// // of AdaptorA.
//
// a1 == a2;
// ----------------
//
// AdaptorA<Iterator> a;
// AdaptorB<Iterator> b;
//
// // This will result in a no such overload error in full operation
// // If enable_if is not supported the static assert used
// // in the operator implementation will fail.
// // This will accidently work if is_convertible is not supported.
//
// a == b;
// ----------------
//
# ifdef BOOST_NO_ONE_WAY_ITERATOR_INTEROP
# define BOOST_ITERATOR_CONVERTIBLE(a,b) mpl::true_()
# else
# define BOOST_ITERATOR_CONVERTIBLE(a,b) is_convertible<a,b>()
# endif
# define BOOST_ITERATOR_FACADE_INTEROP(op, result_type, return_prefix, base_op) \
BOOST_ITERATOR_FACADE_INTEROP_HEAD(inline, op, result_type) \
{ \
/* For those compilers that do not support enable_if */ \
BOOST_STATIC_ASSERT(( \
is_interoperable< Derived1, Derived2 >::value \
)); \
return_prefix iterator_core_access::base_op( \
static_cast<Derived1 const&>(lhs) \
, static_cast<Derived2 const&>(rhs) \
, BOOST_ITERATOR_CONVERTIBLE(Derived2,Derived1) \
); \
}
# define BOOST_ITERATOR_FACADE_RELATION(op, return_prefix, base_op) \
BOOST_ITERATOR_FACADE_INTEROP( \
op \
, detail::always_bool2 \
, return_prefix \
, base_op \
)
BOOST_ITERATOR_FACADE_RELATION(==, return, equal)
BOOST_ITERATOR_FACADE_RELATION(!=, return !, equal)
BOOST_ITERATOR_FACADE_RELATION(<, return 0 >, distance_from)
BOOST_ITERATOR_FACADE_RELATION(>, return 0 <, distance_from)
BOOST_ITERATOR_FACADE_RELATION(<=, return 0 >=, distance_from)
BOOST_ITERATOR_FACADE_RELATION(>=, return 0 <=, distance_from)
# undef BOOST_ITERATOR_FACADE_RELATION
// operator- requires an additional part in the static assertion
BOOST_ITERATOR_FACADE_INTEROP(
-
, detail::choose_difference_type
, return
, distance_from
)
# undef BOOST_ITERATOR_FACADE_INTEROP
# undef BOOST_ITERATOR_FACADE_INTEROP_HEAD
# define BOOST_ITERATOR_FACADE_PLUS(args) \
BOOST_ITERATOR_FACADE_PLUS_HEAD(inline, args) \
{ \
Derived tmp(static_cast<Derived const&>(i)); \
return tmp += n; \
}
BOOST_ITERATOR_FACADE_PLUS((
iterator_facade<Derived, V, TC, R, D> const& i
, typename Derived::difference_type n
))
BOOST_ITERATOR_FACADE_PLUS((
typename Derived::difference_type n
, iterator_facade<Derived, V, TC, R, D> const& i
))
# undef BOOST_ITERATOR_FACADE_PLUS
# undef BOOST_ITERATOR_FACADE_PLUS_HEAD
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_ITERATOR_FACADE_23022003THW_HPP

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@ -1,93 +0,0 @@
// Copyright David Abrahams 2003. Permission to copy, use,
// modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef ITERATOR_TRAITS_DWA200347_HPP
# define ITERATOR_TRAITS_DWA200347_HPP
# include <boost/detail/iterator.hpp>
# include <boost/detail/workaround.hpp>
namespace boost {
// Unfortunately, g++ 2.95.x chokes when we define a class template
// iterator_category which has the same name as its
// std::iterator_category() function, probably due in part to the
// "std:: is visible globally" hack it uses. Use
// BOOST_ITERATOR_CATEGORY to write code that's portable to older
// GCCs.
# if BOOST_WORKAROUND(__GNUC__, <= 2)
# define BOOST_ITERATOR_CATEGORY iterator_category_
# else
# define BOOST_ITERATOR_CATEGORY iterator_category
# endif
template <class Iterator>
struct iterator_value
{
typedef typename detail::iterator_traits<Iterator>::value_type type;
};
template <class Iterator>
struct iterator_reference
{
typedef typename detail::iterator_traits<Iterator>::reference type;
};
template <class Iterator>
struct iterator_pointer
{
typedef typename detail::iterator_traits<Iterator>::pointer type;
};
template <class Iterator>
struct iterator_difference
{
typedef typename detail::iterator_traits<Iterator>::difference_type type;
};
template <class Iterator>
struct BOOST_ITERATOR_CATEGORY
{
typedef typename detail::iterator_traits<Iterator>::iterator_category type;
};
# if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
template <>
struct iterator_value<int>
{
typedef void type;
};
template <>
struct iterator_reference<int>
{
typedef void type;
};
template <>
struct iterator_pointer<int>
{
typedef void type;
};
template <>
struct iterator_difference<int>
{
typedef void type;
};
template <>
struct BOOST_ITERATOR_CATEGORY<int>
{
typedef void type;
};
# endif
} // namespace boost::iterator
#endif // ITERATOR_TRAITS_DWA200347_HPP

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@ -1,251 +0,0 @@
#ifndef BOOST_NEW_ITERATOR_TESTS_HPP
# define BOOST_NEW_ITERATOR_TESTS_HPP
// This is meant to be the beginnings of a comprehensive, generic
// test suite for STL concepts such as iterators and containers.
//
// Revision History:
// 28 Oct 2002 Started update for new iterator categories
// (Jeremy Siek)
// 28 Apr 2002 Fixed input iterator requirements.
// For a == b a++ == b++ is no longer required.
// See 24.1.1/3 for details.
// (Thomas Witt)
// 08 Feb 2001 Fixed bidirectional iterator test so that
// --i is no longer a precondition.
// (Jeremy Siek)
// 04 Feb 2001 Added lvalue test, corrected preconditions
// (David Abrahams)
# include <iterator>
# include <assert.h>
# include <boost/type_traits.hpp>
# include <boost/static_assert.hpp>
# include <boost/concept_archetype.hpp> // for detail::dummy_constructor
# include <boost/detail/iterator.hpp>
# include <boost/pending/iterator_tests.hpp>
# include <boost/iterator/is_readable_iterator.hpp>
# include <boost/iterator/is_lvalue_iterator.hpp>
# include <boost/iterator/detail/config_def.hpp>
# include <boost/detail/is_incrementable.hpp>
namespace boost {
// Do separate tests for *i++ so we can treat, e.g., smart pointers,
// as readable and/or writable iterators.
template <class Iterator, class T>
void readable_iterator_traversal_test(Iterator i1, T v, mpl::true_)
{
T v2 = *i1++;
assert(v == v2);
}
template <class Iterator, class T>
void readable_iterator_traversal_test(const Iterator i1, T v, mpl::false_)
{}
template <class Iterator, class T>
void writable_iterator_traversal_test(Iterator i1, T v, mpl::true_)
{
++i1; // we just wrote into that position
*i1++ = v;
}
template <class Iterator, class T>
void writable_iterator_traversal_test(const Iterator i1, T v, mpl::false_)
{}
// Preconditions: *i == v
template <class Iterator, class T>
void readable_iterator_test(const Iterator i1, T v)
{
Iterator i2(i1); // Copy Constructible
typedef typename detail::iterator_traits<Iterator>::reference ref_t;
ref_t r1 = *i1;
ref_t r2 = *i2;
T v1 = r1;
T v2 = r2;
assert(v1 == v);
assert(v2 == v);
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
readable_iterator_traversal_test(i1, v, detail::is_postfix_incrementable<Iterator>());
// I think we don't really need this as it checks the same things as
// the above code.
BOOST_STATIC_ASSERT(is_readable_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void writable_iterator_test(Iterator i, T v, T v2)
{
Iterator i2(i); // Copy Constructible
*i2 = v;
# if !BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
writable_iterator_traversal_test(
i, v2, mpl::and_<
detail::is_incrementable<Iterator>
, detail::is_postfix_incrementable<Iterator>
>());
# endif
}
template <class Iterator>
void swappable_iterator_test(Iterator i, Iterator j)
{
Iterator i2(i), j2(j);
typename detail::iterator_traits<Iterator>::value_type bi = *i, bj = *j;
iter_swap(i2, j2);
typename detail::iterator_traits<Iterator>::value_type ai = *i, aj = *j;
assert(bi == aj && bj == ai);
}
template <class Iterator, class T>
void constant_lvalue_iterator_test(Iterator i, T v1)
{
Iterator i2(i);
typedef typename detail::iterator_traits<Iterator>::value_type value_type;
typedef typename detail::iterator_traits<Iterator>::reference reference;
BOOST_STATIC_ASSERT((is_same<const value_type&, reference>::value));
const T& v2 = *i2;
assert(v1 == v2);
# ifndef BOOST_NO_LVALUE_RETURN_DETECTION
BOOST_STATIC_ASSERT(is_lvalue_iterator<Iterator>::value);
BOOST_STATIC_ASSERT(!is_non_const_lvalue_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void non_const_lvalue_iterator_test(Iterator i, T v1, T v2)
{
Iterator i2(i);
typedef typename detail::iterator_traits<Iterator>::value_type value_type;
typedef typename detail::iterator_traits<Iterator>::reference reference;
BOOST_STATIC_ASSERT((is_same<value_type&, reference>::value));
T& v3 = *i2;
assert(v1 == v3);
// A non-const lvalue iterator is not neccessarily writable, but we
// are assuming the value_type is assignable here
*i = v2;
T& v4 = *i2;
assert(v2 == v4);
# ifndef BOOST_NO_LVALUE_RETURN_DETECTION
BOOST_STATIC_ASSERT(is_lvalue_iterator<Iterator>::value);
BOOST_STATIC_ASSERT(is_non_const_lvalue_iterator<Iterator>::value);
# endif
}
template <class Iterator, class T>
void forward_readable_iterator_test(Iterator i, Iterator j, T val1, T val2)
{
Iterator i2;
Iterator i3(i);
i2 = i;
assert(i2 == i3);
assert(i != j);
assert(i2 != j);
readable_iterator_test(i, val1);
readable_iterator_test(i2, val1);
readable_iterator_test(i3, val1);
assert(i == i2++);
assert(i != ++i3);
readable_iterator_test(i2, val2);
readable_iterator_test(i3, val2);
readable_iterator_test(i, val1);
}
template <class Iterator, class T>
void forward_swappable_iterator_test(Iterator i, Iterator j, T val1, T val2)
{
forward_readable_iterator_test(i, j, val1, val2);
Iterator i2 = i;
++i2;
swappable_iterator_test(i, i2);
}
// bidirectional
// Preconditions: *i == v1, *++i == v2
template <class Iterator, class T>
void bidirectional_readable_iterator_test(Iterator i, T v1, T v2)
{
Iterator j(i);
++j;
forward_readable_iterator_test(i, j, v1, v2);
++i;
Iterator i1 = i, i2 = i;
assert(i == i1--);
assert(i != --i2);
readable_iterator_test(i, v2);
readable_iterator_test(i1, v1);
readable_iterator_test(i2, v1);
--i;
assert(i == i1);
assert(i == i2);
++i1;
++i2;
readable_iterator_test(i, v1);
readable_iterator_test(i1, v2);
readable_iterator_test(i2, v2);
}
// random access
// Preconditions: [i,i+N) is a valid range
template <class Iterator, class TrueVals>
void random_access_readable_iterator_test(Iterator i, int N, TrueVals vals)
{
bidirectional_readable_iterator_test(i, vals[0], vals[1]);
const Iterator j = i;
int c;
for (c = 0; c < N-1; ++c)
{
assert(i == j + c);
assert(*i == vals[c]);
typename detail::iterator_traits<Iterator>::value_type x = j[c];
assert(*i == x);
assert(*i == *(j + c));
assert(*i == *(c + j));
++i;
assert(i > j);
assert(i >= j);
assert(j <= i);
assert(j < i);
}
Iterator k = j + N - 1;
for (c = 0; c < N-1; ++c)
{
assert(i == k - c);
assert(*i == vals[N - 1 - c]);
typename detail::iterator_traits<Iterator>::value_type x = j[N - 1 - c];
assert(*i == x);
Iterator q = k - c;
assert(*i == *q);
assert(i > j);
assert(i >= j);
assert(j <= i);
assert(j < i);
--i;
}
}
} // namespace boost
# include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_NEW_ITERATOR_TESTS_HPP

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// (C) Copyright Toon Knapen 2001.
// (C) Copyright David Abrahams 2003.
// (C) Copyright Roland Richter 2003.
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
#ifndef BOOST_PERMUTATION_ITERATOR_HPP
#define BOOST_PERMUTATION_ITERATOR_HPP
#include <iterator>
#include <boost/iterator/iterator_adaptor.hpp>
namespace boost
{
template< class ElementIterator
, class IndexIterator>
class permutation_iterator
: public iterator_adaptor<
permutation_iterator<ElementIterator, IndexIterator>
, IndexIterator, typename detail::iterator_traits<ElementIterator>::value_type
, use_default, typename detail::iterator_traits<ElementIterator>::reference>
{
typedef iterator_adaptor<
permutation_iterator<ElementIterator, IndexIterator>
, IndexIterator, typename detail::iterator_traits<ElementIterator>::value_type
, use_default, typename detail::iterator_traits<ElementIterator>::reference> super_t;
friend class iterator_core_access;
public:
permutation_iterator() : m_elt_iter() {}
explicit permutation_iterator(ElementIterator x, IndexIterator y)
: super_t(y), m_elt_iter(x) {}
template<class OtherElementIterator, class OtherIndexIterator>
permutation_iterator(
permutation_iterator<OtherElementIterator, OtherIndexIterator> const& r
, typename enable_if_convertible<OtherElementIterator, ElementIterator>::type* = 0
, typename enable_if_convertible<OtherIndexIterator, IndexIterator>::type* = 0
)
: super_t(r.base()), m_elt_iter(r.m_elt_iter)
{}
private:
typename super_t::reference dereference() const
{ return *(m_elt_iter + *this->base()); }
ElementIterator m_elt_iter;
};
template <class ElementIterator, class IndexIterator>
permutation_iterator<ElementIterator, IndexIterator>
make_permutation_iterator( ElementIterator e, IndexIterator i )
{
return permutation_iterator<ElementIterator, IndexIterator>( e, i );
}
} // namespace boost
#endif

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_REVERSE_ITERATOR_23022003THW_HPP
#define BOOST_REVERSE_ITERATOR_23022003THW_HPP
#include <boost/iterator.hpp>
#include <boost/utility.hpp>
#include <boost/iterator/iterator_adaptor.hpp>
namespace boost
{
//
//
//
template <class Iterator>
class reverse_iterator
: public iterator_adaptor< reverse_iterator<Iterator>, Iterator >
{
typedef iterator_adaptor< reverse_iterator<Iterator>, Iterator > super_t;
friend class iterator_core_access;
public:
reverse_iterator() {}
explicit reverse_iterator(Iterator x)
: super_t(x) {}
template<class OtherIterator>
reverse_iterator(
reverse_iterator<OtherIterator> const& r
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0
)
: super_t(r.base())
{}
private:
typename super_t::reference dereference() const { return *boost::prior(this->base()); }
void increment() { --this->base_reference(); }
void decrement() { ++this->base_reference(); }
void advance(typename super_t::difference_type n)
{
this->base_reference() += -n;
}
template <class OtherIterator>
typename super_t::difference_type
distance_to(reverse_iterator<OtherIterator> const& y) const
{
return this->base_reference() - y.base();
}
};
template <class BidirectionalIterator>
reverse_iterator<BidirectionalIterator> make_reverse_iterator(BidirectionalIterator x)
{
return reverse_iterator<BidirectionalIterator>(x);
}
} // namespace boost
#endif // BOOST_REVERSE_ITERATOR_23022003THW_HPP

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// (C) Copyright David Abrahams 2002.
// (C) Copyright Jeremy Siek 2002.
// (C) Copyright Thomas Witt 2002.
// Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#ifndef BOOST_TRANSFORM_ITERATOR_23022003THW_HPP
#define BOOST_TRANSFORM_ITERATOR_23022003THW_HPP
#include <boost/function.hpp>
#include <boost/iterator.hpp>
#include <boost/iterator/detail/enable_if.hpp>
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/iterator/iterator_categories.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/type_traits/function_traits.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/is_class.hpp>
#include <boost/type_traits/is_function.hpp>
#include <boost/type_traits/is_reference.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/remove_reference.hpp>
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310))
# include <boost/type_traits/is_base_and_derived.hpp>
#endif
#include <boost/iterator/detail/config_def.hpp>
namespace boost
{
template <class UnaryFunction, class Iterator, class Reference = use_default, class Value = use_default>
class transform_iterator;
namespace detail
{
template <class UnaryFunction>
struct function_object_result
{
typedef typename UnaryFunction::result_type type;
};
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class Return, class Argument>
struct function_object_result<Return(*)(Argument)>
{
typedef Return type;
};
#endif
// Compute the iterator_adaptor instantiation to be used for transform_iterator
template <class UnaryFunction, class Iterator, class Reference, class Value>
struct transform_iterator_base
{
private:
// By default, dereferencing the iterator yields the same as
// the function. Do we need to adjust the way
// function_object_result is computed for the standard
// proposal (e.g. using Doug's result_of)?
typedef typename ia_dflt_help<
Reference
, function_object_result<UnaryFunction>
>::type reference;
// To get the default for Value: remove any reference on the
// result type, but retain any constness to signal
// non-writability. Note that if we adopt Thomas' suggestion
// to key non-writability *only* on the Reference argument,
// we'd need to strip constness here as well.
typedef typename ia_dflt_help<
Value
, remove_reference<reference>
>::type cv_value_type;
public:
typedef iterator_adaptor<
transform_iterator<UnaryFunction, Iterator, Reference, Value>
, Iterator
, cv_value_type
, use_default // Leave the traversal category alone
, reference
> type;
};
}
template <class UnaryFunction, class Iterator, class Reference, class Value>
class transform_iterator
: public detail::transform_iterator_base<UnaryFunction, Iterator, Reference, Value>::type
{
typedef typename
detail::transform_iterator_base<UnaryFunction, Iterator, Reference, Value>::type
super_t;
friend class iterator_core_access;
public:
transform_iterator() { }
transform_iterator(Iterator const& x, UnaryFunction f)
: super_t(x), m_f(f) { }
explicit transform_iterator(Iterator const& x)
: super_t(x)
{
// Pro8 is a little too aggressive about instantiating the
// body of this function.
#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
// don't provide this constructor if UnaryFunction is a
// function pointer type, since it will be 0. Too dangerous.
BOOST_STATIC_ASSERT(is_class<UnaryFunction>::value);
#endif
}
template<
class OtherUnaryFunction
, class OtherIterator
, class OtherReference
, class OtherValue>
transform_iterator(
transform_iterator<OtherUnaryFunction, OtherIterator, OtherReference, OtherValue> const& t
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0
#if !BOOST_WORKAROUND(BOOST_MSVC, <= 1310)
, typename enable_if_convertible<OtherUnaryFunction, UnaryFunction>::type* = 0
#endif
)
: super_t(t.base()), m_f(t.functor())
{}
UnaryFunction functor() const
{ return m_f; }
private:
typename super_t::reference dereference() const
{ return m_f(*this->base()); }
// Probably should be the initial base class so it can be
// optimized away via EBO if it is an empty class.
UnaryFunction m_f;
};
template <class UnaryFunction, class Iterator>
transform_iterator<UnaryFunction, Iterator>
make_transform_iterator(Iterator it, UnaryFunction fun)
{
return transform_iterator<UnaryFunction, Iterator>(it, fun);
}
// Version which allows explicit specification of the UnaryFunction
// type.
//
// This generator is not provided if UnaryFunction is a function
// pointer type, because it's too dangerous: the default-constructed
// function pointer in the iterator be 0, leading to a runtime
// crash.
template <class UnaryFunction, class Iterator>
typename iterators::enable_if<
is_class<UnaryFunction> // We should probably find a cheaper test than is_class<>
, transform_iterator<UnaryFunction, Iterator>
>::type
make_transform_iterator(Iterator it)
{
return transform_iterator<UnaryFunction, Iterator>(it, UnaryFunction());
}
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
template <class Return, class Argument, class Iterator>
transform_iterator< Return (*)(Argument), Iterator, Return>
make_transform_iterator(Iterator it, Return (*fun)(Argument))
{
return transform_iterator<Return (*)(Argument), Iterator, Return>(it, fun);
}
#endif
} // namespace boost
#include <boost/iterator/detail/config_undef.hpp>
#endif // BOOST_TRANSFORM_ITERATOR_23022003THW_HPP

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// (C) Copyright David Abrahams and Thomas Becker 2000. Permission to
// copy, use, modify, sell and distribute this software is granted
// provided this copyright notice appears in all copies. This software
// is provided "as is" without express or implied warranty, and with
// no claim as to its suitability for any purpose.
//
// Compilers Tested:
// =================
// Metrowerks Codewarrior Pro 7.2, 8.3
// gcc 2.95.3
// gcc 3.2
// Microsoft VC 6sp5 (test fails due to some compiler bug)
// Microsoft VC 7 (works)
// Microsoft VC 7.1
// Intel 5
// Intel 6
// Intel 7.1
// Intel 8
// Borland 5.5.1 (broken due to lack of support from Boost.Tuples)
#ifndef BOOST_ZIP_ITERATOR_TMB_07_13_2003_HPP_
#include <stddef.h>
#include <boost/iterator.hpp>
#include <boost/iterator/iterator_traits.hpp>
#include <boost/iterator/iterator_facade.hpp>
#include <boost/iterator/iterator_adaptor.hpp> // for enable_if_convertible
#include <boost/iterator/iterator_categories.hpp>
#include <boost/detail/iterator.hpp>
#include <boost/iterator/detail/minimum_category.hpp>
#include <boost/tuple/tuple.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/apply.hpp>
#include <boost/mpl/apply_if.hpp>
#include <boost/mpl/lambda.hpp>
#include <boost/mpl/placeholders.hpp>
#include <boost/mpl/aux_/lambda_support.hpp>
namespace boost {
// Zip iterator forward declaration for zip_iterator_base
template<typename IteratorTuple>
class zip_iterator;
// One important design goal of the zip_iterator is to isolate all
// functionality whose implementation relies on the current tuple
// implementation. This goal has been achieved as follows: Inside
// the namespace detail there is a namespace tuple_impl_specific.
// This namespace encapsulates all functionality that is specific
// to the current Boost tuple implementation. More precisely, the
// namespace tuple_impl_specific provides the following tuple
// algorithms and meta-algorithms for the current Boost tuple
// implementation:
//
// tuple_meta_transform
// tuple_meta_accumulate
// tuple_transform
// tuple_for_each
//
// If the tuple implementation changes, all that needs to be
// replaced is the implementation of these four (meta-)algorithms.
namespace detail
{
// Functors to be used with tuple algorithms
//
template<typename DiffType>
class advance_iterator
{
public:
advance_iterator(DiffType step) : m_step(step) {}
template<typename Iterator>
void operator()(Iterator& it) const
{ it += m_step; }
private:
DiffType m_step;
};
//
struct increment_iterator
{
template<typename Iterator>
void operator()(Iterator& it)
{ ++it; }
};
//
struct decrement_iterator
{
template<typename Iterator>
void operator()(Iterator& it)
{ --it; }
};
//
struct dereference_iterator
{
template<typename Iterator>
struct apply
{
typedef typename
iterator_traits<Iterator>::reference
type;
};
template<typename Iterator>
typename apply<Iterator>::type operator()(Iterator const& it)
{ return *it; }
};
// The namespace tuple_impl_specific provides two meta-
// algorithms and two algorithms for tuples.
//
namespace tuple_impl_specific
{
// Meta-transform algorithm for tuples
//
template<typename Tuple, class UnaryMetaFun>
struct tuple_meta_transform;
template<typename Tuple, class UnaryMetaFun>
struct tuple_meta_transform_impl
{
typedef tuples::cons<
typename mpl::apply1<
typename mpl::lambda<UnaryMetaFun>::type
, typename Tuple::head_type
>::type
, typename tuple_meta_transform<
typename Tuple::tail_type
, UnaryMetaFun
>::type
> type;
};
template<typename Tuple, class UnaryMetaFun>
struct tuple_meta_transform
: mpl::apply_if<
boost::is_same<Tuple, tuples::null_type>
, mpl::identity<tuples::null_type>
, tuple_meta_transform_impl<Tuple, UnaryMetaFun>
>
{
};
// Meta-accumulate algorithm for tuples. Note: The template
// parameter StartType corresponds to the initial value in
// ordinary accumulation.
//
template<class Tuple, class BinaryMetaFun, class StartType>
struct tuple_meta_accumulate;
template<
typename Tuple
, class BinaryMetaFun
, typename StartType
>
struct tuple_meta_accumulate_impl
{
typedef typename mpl::apply2<
typename mpl::lambda<BinaryMetaFun>::type
, typename Tuple::head_type
, typename tuple_meta_accumulate<
typename Tuple::tail_type
, BinaryMetaFun
, StartType
>::type
>::type type;
};
template<
typename Tuple
, class BinaryMetaFun
, typename StartType
>
struct tuple_meta_accumulate
: mpl::apply_if<
#if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
mpl::or_<
#endif
boost::is_same<Tuple, tuples::null_type>
#if BOOST_WORKAROUND(BOOST_MSVC, == 1200)
, boost::is_same<Tuple,int>
>
#endif
, mpl::identity<StartType>
, tuple_meta_accumulate_impl<
Tuple
, BinaryMetaFun
, StartType
>
>
{
};
#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) \
|| ( \
BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, != 0) && defined(_MSC_VER) \
)
// Not sure why intel's partial ordering fails in this case, but I'm
// assuming int's an MSVC bug-compatibility feature.
# define BOOST_TUPLE_ALGO_DISPATCH
# define BOOST_TUPLE_ALGO(algo) algo##_impl
# define BOOST_TUPLE_ALGO_TERMINATOR , int
# define BOOST_TUPLE_ALGO_RECURSE , ...
#else
# define BOOST_TUPLE_ALGO(algo) algo
# define BOOST_TUPLE_ALGO_TERMINATOR
# define BOOST_TUPLE_ALGO_RECURSE
#endif
// transform algorithm for tuples. The template parameter Fun
// must be a unary functor which is also a unary metafunction
// class that computes its return type based on its argument
// type. For example:
//
// struct to_ptr
// {
// template <class Arg>
// struct apply
// {
// typedef Arg* type;
// }
//
// template <class Arg>
// Arg* operator()(Arg x);
// };
template<typename Fun>
tuples::null_type BOOST_TUPLE_ALGO(tuple_transform)
(tuples::null_type const&, Fun BOOST_TUPLE_ALGO_TERMINATOR)
{ return tuples::null_type(); }
template<typename Tuple, typename Fun>
typename tuple_meta_transform<
Tuple
, Fun
>::type
BOOST_TUPLE_ALGO(tuple_transform)(
const Tuple& t,
Fun f
BOOST_TUPLE_ALGO_RECURSE
)
{
typedef typename tuple_meta_transform<
BOOST_DEDUCED_TYPENAME Tuple::tail_type
, Fun
>::type transformed_tail_type;
return tuples::cons<
BOOST_DEDUCED_TYPENAME mpl::apply1<
Fun, BOOST_DEDUCED_TYPENAME Tuple::head_type
>::type
, transformed_tail_type
>(
f(boost::tuples::get<0>(t)), tuple_transform(t.get_tail(), f)
);
}
#ifdef BOOST_TUPLE_ALGO_DISPATCH
template<typename Tuple, typename Fun>
typename tuple_meta_transform<
Tuple
, Fun
>::type
tuple_transform(
const Tuple& t,
Fun f
)
{
return tuple_transform_impl(t, f, 1);
}
#endif
// for_each algorithm for tuples.
//
template<typename Fun>
Fun BOOST_TUPLE_ALGO(tuple_for_each)(
tuples::null_type
, Fun f BOOST_TUPLE_ALGO_TERMINATOR
)
{ return f; }
template<typename Tuple, typename Fun>
Fun BOOST_TUPLE_ALGO(tuple_for_each)(
Tuple& t
, Fun f BOOST_TUPLE_ALGO_RECURSE)
{
f( t.get_head() );
return tuple_for_each(t.get_tail(), f);
}
#ifdef BOOST_TUPLE_ALGO_DISPATCH
template<typename Tuple, typename Fun>
Fun
tuple_for_each(
Tuple& t,
Fun f
)
{
return tuple_for_each_impl(t, f, 1);
}
#endif
// Equality of tuples. NOTE: "==" for tuples currently (7/2003)
// has problems under some compilers, so I just do my own.
// No point in bringing in a bunch of #ifdefs here. This is
// going to go away with the next tuple implementation anyway.
//
bool tuple_equal(tuples::null_type, tuples::null_type)
{ return true; }
template<typename Tuple1, typename Tuple2>
bool tuple_equal(
Tuple1 const& t1,
Tuple2 const& t2
)
{
return t1.get_head() == t2.get_head() &&
tuple_equal(t1.get_tail(), t2.get_tail());
}
}
//
// end namespace tuple_impl_specific
template<typename Iterator>
struct iterator_reference
{
typedef typename iterator_traits<Iterator>::reference type;
};
#ifdef BOOST_MPL_NO_FULL_LAMBDA_SUPPORT
// Hack because BOOST_MPL_AUX_LAMBDA_SUPPORT doesn't seem to work
// out well. Instantiating the nested apply template also
// requires instantiating iterator_traits on the
// placeholder. Instead we just specialize it as a metafunction
// class.
template<>
struct iterator_reference<mpl::_1>
{
template <class T>
struct apply : iterator_reference<T> {};
};
#endif
// Metafunction to obtain the type of the tuple whose element types
// are the reference types of an iterator tuple.
//
template<typename IteratorTuple>
struct tuple_of_references
: tuple_impl_specific::tuple_meta_transform<
IteratorTuple,
iterator_reference<mpl::_1>
>
{
};
// Metafunction to obtain the minimal traversal tag in a tuple
// of iterators.
//
template<typename IteratorTuple>
struct minimum_traversal_category_in_iterator_tuple
{
typedef typename tuple_impl_specific::tuple_meta_transform<
IteratorTuple
, iterator_traversal<>
>::type tuple_of_traversal_tags;
typedef typename tuple_impl_specific::tuple_meta_accumulate<
tuple_of_traversal_tags
, minimum_category<>
, random_access_traversal_tag
>::type type;
};
#if BOOST_WORKAROUND(BOOST_MSVC, == 1200) // ETI workaround
template <>
struct minimum_traversal_category_in_iterator_tuple<int>
{
typedef int type;
};
#endif
// We need to call tuple_meta_accumulate with mpl::and_ as the
// accumulating functor. To this end, we need to wrap it into
// a struct that has exactly two arguments (that is, template
// parameters) and not five, like mpl::and_ does.
//
template<typename Arg1, typename Arg2>
struct and_with_two_args
: mpl::and_<Arg1, Arg2>
{
};
# ifdef BOOST_MPL_NO_FULL_LAMBDA_SUPPORT
// Hack because BOOST_MPL_AUX_LAMBDA_SUPPORT doesn't seem to work
// out well. In this case I think it's an MPL bug
template<>
struct and_with_two_args<mpl::_1,mpl::_2>
{
template <class A1, class A2>
struct apply : mpl::and_<A1,A2>
{};
};
# endif
///////////////////////////////////////////////////////////////////
//
// Class zip_iterator_base
//
// Builds and exposes the iterator facade type from which the zip
// iterator will be derived.
//
template<typename IteratorTuple>
struct zip_iterator_base
{
private:
// Reference type is the type of the tuple obtained from the
// iterators' reference types.
typedef typename
detail::tuple_of_references<IteratorTuple>::type reference;
// Value type is the same as reference type.
typedef reference value_type;
// Difference type is the first iterator's difference type
typedef typename iterator_traits<
typename tuples::element<0, IteratorTuple>::type
>::difference_type difference_type;
// Traversal catetgory is the minimum traversal category in the
// iterator tuple.
typedef typename
detail::minimum_traversal_category_in_iterator_tuple<
IteratorTuple
>::type traversal_category;
public:
// The iterator facade type from which the zip iterator will
// be derived.
typedef iterator_facade<
zip_iterator<IteratorTuple>,
value_type,
traversal_category,
reference,
difference_type
> type;
};
template <>
struct zip_iterator_base<int>
{
typedef int type;
};
}
/////////////////////////////////////////////////////////////////////
//
// zip_iterator class definition
//
template<typename IteratorTuple>
class zip_iterator :
public detail::zip_iterator_base<IteratorTuple>::type
{
// Typedef super_t as our base class.
typedef typename
detail::zip_iterator_base<IteratorTuple>::type super_t;
// iterator_core_access is the iterator's best friend.
friend class iterator_core_access;
public:
// Construction
// ============
// Default constructor
zip_iterator() { }
// Constructor from iterator tuple
zip_iterator(IteratorTuple iterator_tuple)
: m_iterator_tuple(iterator_tuple)
{ }
// Copy constructor
template<typename OtherIteratorTuple>
zip_iterator(
const zip_iterator<OtherIteratorTuple>& other,
typename enable_if_convertible<
OtherIteratorTuple,
IteratorTuple
>::type* = 0
) : m_iterator_tuple(other.get_iterator_tuple())
{}
// Get method for the iterator tuple.
const IteratorTuple& get_iterator_tuple() const
{ return m_iterator_tuple; }
private:
// Implementation of Iterator Operations
// =====================================
// Dereferencing returns a tuple built from the dereferenced
// iterators in the iterator tuple.
typename super_t::reference dereference() const
{
return detail::tuple_impl_specific::tuple_transform(
get_iterator_tuple(),
detail::dereference_iterator()
);
}
// Two zip iterators are equal if all iterators in the iterator
// tuple are equal. NOTE: It should be possible to implement this
// as
//
// return get_iterator_tuple() == other.get_iterator_tuple();
//
// but equality of tuples currently (7/2003) does not compile
// under several compilers. No point in bringing in a bunch
// of #ifdefs here.
//
template<typename OtherIteratorTuple>
bool equal(const zip_iterator<OtherIteratorTuple>& other) const
{
return detail::tuple_impl_specific::tuple_equal(
get_iterator_tuple(),
other.get_iterator_tuple()
);
}
// Advancing a zip iterator means to advance all iterators in the
// iterator tuple.
void advance(typename super_t::difference_type n)
{
detail::tuple_impl_specific::tuple_for_each(
m_iterator_tuple,
detail::advance_iterator<BOOST_DEDUCED_TYPENAME super_t::difference_type>(n)
);
}
// Incrementing a zip iterator means to increment all iterators in
// the iterator tuple.
void increment()
{
detail::tuple_impl_specific::tuple_for_each(
m_iterator_tuple,
detail::increment_iterator()
);
}
// Decrementing a zip iterator means to decrement all iterators in
// the iterator tuple.
void decrement()
{
detail::tuple_impl_specific::tuple_for_each(
m_iterator_tuple,
detail::decrement_iterator()
);
}
// Distance is calculated using the first iterator in the tuple.
template<typename OtherIteratorTuple>
typename super_t::difference_type distance_to(
const zip_iterator<OtherIteratorTuple>& other
) const
{
return boost::tuples::get<0>(other.get_iterator_tuple()) -
boost::tuples::get<0>(this->get_iterator_tuple());
}
// Data Members
// ============
// The iterator tuple.
IteratorTuple m_iterator_tuple;
};
// Make function for zip iterator
//
template<typename IteratorTuple>
zip_iterator<IteratorTuple>
make_zip_iterator(IteratorTuple t)
{ return zip_iterator<IteratorTuple>(t); }
}
#endif

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@ -12,8 +12,7 @@
#define BOOST_INTEGER_RANGE_HPP_
#include <boost/config.hpp>
#include <boost/iterator/counting_iterator.hpp>
#include <algorithm>
#include <boost/counting_iterator.hpp>
namespace boost {
@ -22,7 +21,7 @@ namespace boost {
template <class IntegerType>
struct integer_range {
typedef counting_iterator<IntegerType> iterator;
typedef typename counting_iterator_generator<IntegerType>::type iterator;
typedef iterator const_iterator;
typedef IntegerType value_type;

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@ -1,7 +1 @@
// Copyright David Abrahams 2003. Permission to copy, use,
// modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#include <boost/iterator_adaptors.hpp>

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@ -1,8 +1,3 @@
// Copyright David Abrahams and Jeremy Siek 2003. Permission to copy,
// use, modify, sell and distribute this software is granted provided
// this copyright notice appears in all copies. This software is
// provided "as is" without express or implied warranty, and with no
// claim as to its suitability for any purpose.
#ifndef BOOST_ITERATOR_TESTS_HPP
# define BOOST_ITERATOR_TESTS_HPP
@ -10,10 +5,6 @@
// test suite for STL concepts such as iterators and containers.
//
// Revision History:
// 28 Apr 2002 Fixed input iterator requirements.
// For a == b a++ == b++ is no longer required.
// See 24.1.1/3 for details.
// (Thomas Witt)
// 08 Feb 2001 Fixed bidirectional iterator test so that
// --i is no longer a precondition.
// (Jeremy Siek)
@ -25,8 +16,6 @@
# include <boost/type_traits.hpp>
# include <boost/static_assert.hpp>
# include <boost/concept_archetype.hpp> // for detail::dummy_constructor
# include <boost/implicit_cast.hpp>
# include <boost/type_traits/broken_compiler_spec.hpp>
namespace boost {
@ -40,11 +29,6 @@ struct dummyT {
int m_x;
};
}
BOOST_TT_BROKEN_COMPILER_SPEC(boost::dummyT)
namespace boost {
// Tests whether type Iterator satisfies the requirements for a
// TrivialIterator.
@ -90,40 +74,22 @@ void mutable_trivial_iterator_test(const Iterator i, const Iterator j, T val)
template <class Iterator, class T>
void input_iterator_test(Iterator i, T v1, T v2)
{
Iterator i1(i);
Iterator i1 = i, i2 = i;
assert(i == i1);
assert(!(i != i1));
assert(i == i1++);
assert(i != ++i2);
// I can see no generic way to create an input iterator
// that is in the domain of== of i and != i.
// The following works for istream_iterator but is not
// guaranteed to work for arbitrary input iterators.
//
// Iterator i2;
//
// assert(i != i2);
// assert(!(i == i2));
trivial_iterator_test(i, i1, v1);
trivial_iterator_test(i, i2, v1);
assert(*i1 == v1);
assert(*i == v1);
// we cannot test for equivalence of (void)++i & (void)i++
// as i is only guaranteed to be single pass.
assert(*i++ == v1);
i1 = i;
assert(i == i1);
assert(!(i != i1));
assert(*i1 == v2);
assert(*i == v2);
// i is dereferencable, so it must be incrementable.
++i;
assert(i == i1);
assert(i == i2);
++i1;
++i2;
// how to test for operator-> ?
trivial_iterator_test(i, i1, v2);
trivial_iterator_test(i, i2, v2);
}
// how to test output iterator?
@ -158,23 +124,6 @@ void forward_iterator_test(Iterator i, T v1, T v2)
{
input_iterator_test(i, v1, v2);
Iterator i1 = i, i2 = i;
assert(i == i1++);
assert(i != ++i2);
trivial_iterator_test(i, i1, v1);
trivial_iterator_test(i, i2, v1);
++i;
assert(i == i1);
assert(i == i2);
++i1;
++i2;
trivial_iterator_test(i, i1, v2);
trivial_iterator_test(i, i2, v2);
// borland doesn't allow non-type template parameters
# if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
lvalue_test<(boost::is_pointer<Iterator>::value)>::check(i);
@ -208,8 +157,6 @@ void bidirectional_iterator_test(Iterator i, T v1, T v2)
// mutable_bidirectional_iterator_test
template <class U> struct undefined;
// Preconditions: [i,i+N) is a valid range
template <class Iterator, class TrueVals>
void random_access_iterator_test(Iterator i, int N, TrueVals vals)
@ -218,12 +165,10 @@ void random_access_iterator_test(Iterator i, int N, TrueVals vals)
const Iterator j = i;
int c;
typedef typename boost::detail::iterator_traits<Iterator>::value_type value_type;
for (c = 0; c < N-1; ++c) {
assert(i == j + c);
assert(*i == vals[c]);
assert(*i == boost::implicit_cast<value_type>(j[c]));
assert(*i == j[c]);
assert(*i == *(j + c));
assert(*i == *(c + j));
++i;
@ -237,7 +182,7 @@ void random_access_iterator_test(Iterator i, int N, TrueVals vals)
for (c = 0; c < N-1; ++c) {
assert(i == k - c);
assert(*i == vals[N - 1 - c]);
assert(*i == boost::implicit_cast<value_type>(j[N - 1 - c]));
assert(*i == j[N - 1 - c]);
Iterator q = k - c;
assert(*i == *q);
assert(i > j);

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@ -1,68 +0,0 @@
// Copyright David Abrahams 2004. Use, modification and distribution is
// subject to 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)
#ifndef POINTEE_DWA200415_HPP
# define POINTEE_DWA200415_HPP
// dereferenceable_traits provides access to the value_type and
// reference of a Dereferenceable type.
# include <boost/detail/is_incrementable.hpp>
# include <boost/iterator/iterator_traits.hpp>
# include <boost/type_traits/add_const.hpp>
# include <boost/type_traits/remove_cv.hpp>
# include <boost/mpl/if.hpp>
# include <boost/mpl/apply_if.hpp>
namespace boost {
namespace detail
{
template <class P>
struct smart_ptr_pointee
{
typedef typename P::element_type type;
};
template <class Iterator>
struct iterator_pointee
{
typedef typename iterator_traits<Iterator>::value_type value_type;
struct impl
{
template <class T>
static char test(T const&);
static char (& test(value_type&) )[2];
static Iterator& x;
};
BOOST_STATIC_CONSTANT(bool, is_constant = sizeof(impl::test(*impl::x)) == 1);
typedef typename mpl::if_c<
# if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
::boost::detail::iterator_pointee<Iterator>::is_constant
# else
is_constant
# endif
, typename add_const<value_type>::type
, value_type
>::type type;
};
}
template <class P>
struct pointee
: mpl::apply_if<
detail::is_incrementable<P>
, detail::iterator_pointee<P>
, detail::smart_ptr_pointee<P>
>
{
};
} // namespace boost
#endif // POINTEE_DWA200415_HPP

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@ -1,62 +0,0 @@
// (C) Copyright Ronald Garcia 2002. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// See http://www.boost.org/libs/utility/shared_container_iterator.html for documentation.
#ifndef SHARED_CONTAINER_ITERATOR_RG08102002_HPP
#define SHARED_CONTAINER_ITERATOR_RG08102002_HPP
#include "boost/iterator_adaptors.hpp"
#include "boost/shared_ptr.hpp"
#include <utility>
namespace boost {
template <typename Container>
class shared_container_iterator : public iterator_adaptor<
shared_container_iterator<Container>,
typename Container::iterator> {
typedef iterator_adaptor<
shared_container_iterator<Container>,
typename Container::iterator> super_t;
typedef typename Container::iterator iterator_t;
typedef boost::shared_ptr<Container> container_ref_t;
container_ref_t container_ref;
public:
shared_container_iterator() { }
shared_container_iterator(iterator_t const& x,container_ref_t const& c) :
super_t(x), container_ref(c) { }
};
template <typename Container>
shared_container_iterator<Container>
make_shared_container_iterator(typename Container::iterator iter,
boost::shared_ptr<Container> const& container) {
typedef shared_container_iterator<Container> iterator;
return iterator(iter,container);
}
template <typename Container>
std::pair<
shared_container_iterator<Container>,
shared_container_iterator<Container> >
make_shared_container_range(boost::shared_ptr<Container> const& container) {
return
std::make_pair(
make_shared_container_iterator(container->begin(),container),
make_shared_container_iterator(container->end(),container));
}
} // namespace boost
#endif // SHARED_CONTAINER_ITERATOR_RG08102002_HPP