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Introducing allocator_traits and pointer_traits changes into several libraries.

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[SVN r76106]
This commit is contained in:
Ion Gaztañaga
2011-12-22 20:08:24 +00:00
parent 6c1c4801c9
commit 5c77541284
1 changed files with 107 additions and 6 deletions
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113
include/boost/move/move.hpp
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@ -23,9 +23,12 @@
#ifdef BOOST_MSVC
#ifndef _CRT_SECURE_NO_DEPRECATE
#define BOOST_INTERPROCESS_CRT_SECURE_NO_DEPRECATE
#define _CRT_SECURE_NO_DEPRECATE
#define _SCL_SECURE_NO_WARNINGS
#define BOOST_INTERPROCESS_CRT_SECURE_NO_DEPRECATE
#define _CRT_SECURE_NO_DEPRECATE
#endif
#ifndef _SCL_SECURE_NO_WARNINGS
#define BOOST_INTERPROCESS_SCL_SECURE_NO_WARNINGS
#define _SCL_SECURE_NO_WARNINGS
#endif
#pragma warning (push)
#pragma warning(disable:4996)
@ -1080,14 +1083,112 @@ struct has_trivial_destructor_after_move
: BOOST_MOVE_BOOST_NS::has_trivial_destructor<T>
{};
namespace move_detail {
// Code from Jeffrey Lee Hellrung, many thanks
#ifndef BOOST_NO_RVALUE_REFERENCES
template< class T> struct forward_type { typedef T type; };
#else // #ifndef BOOST_NO_RVALUE_REFERENCES
template< class T>
struct forward_type
{ typedef const T &type; };
template< class T>
struct forward_type< boost::rv<T> >
{ typedef T type; };
#endif // #ifndef BOOST_NO_RVALUE_REFERENCES
// Code from Jeffrey Lee Hellrung, many thanks
template< class T > struct is_rvalue_reference : BOOST_MOVE_BOOST_NS::integral_constant<bool, false> { };
#ifndef BOOST_NO_RVALUE_REFERENCES
template< class T > struct is_rvalue_reference< T&& > : BOOST_MOVE_BOOST_NS::integral_constant<bool, true> { };
#else // #ifndef BOOST_NO_RVALUE_REFERENCES
template< class T > struct is_rvalue_reference< boost::rv<T>& >
: BOOST_MOVE_BOOST_NS::integral_constant<bool, true>
{};
template< class T > struct is_rvalue_reference< const boost::rv<T>& >
: BOOST_MOVE_BOOST_NS::integral_constant<bool, true>
{};
#endif // #ifndef BOOST_NO_RVALUE_REFERENCES
#ifndef BOOST_NO_RVALUE_REFERENCES
template< class T > struct add_rvalue_reference { typedef T&& type; };
#else // #ifndef BOOST_NO_RVALUE_REFERENCES
namespace detail_add_rvalue_reference
{
template< class T
, bool emulation = ::boost::has_move_emulation_enabled<T>::value
, bool rv = ::boost::move_detail::is_rv<T>::value >
struct add_rvalue_reference_impl { typedef T type; };
template< class T, bool emulation>
struct add_rvalue_reference_impl< T, emulation, true > { typedef T & type; };
template< class T, bool rv >
struct add_rvalue_reference_impl< T, true, rv > { typedef ::boost::rv<T>& type; };
} // namespace detail_add_rvalue_reference
template< class T >
struct add_rvalue_reference
: detail_add_rvalue_reference::add_rvalue_reference_impl<T>
{ };
template< class T >
struct add_rvalue_reference<T &>
{ typedef T & type; };
#endif // #ifndef BOOST_NO_RVALUE_REFERENCES
template< class T > struct remove_rvalue_reference { typedef T type; };
#ifndef BOOST_NO_RVALUE_REFERENCES
template< class T > struct remove_rvalue_reference< T&& > { typedef T type; };
#else // #ifndef BOOST_NO_RVALUE_REFERENCES
template< class T > struct remove_rvalue_reference< rv<T> > { typedef T type; };
template< class T > struct remove_rvalue_reference< const rv<T> > { typedef T type; };
template< class T > struct remove_rvalue_reference< volatile rv<T> > { typedef T type; };
template< class T > struct remove_rvalue_reference< const volatile rv<T> > { typedef T type; };
template< class T > struct remove_rvalue_reference< rv<T>& > { typedef T type; };
template< class T > struct remove_rvalue_reference< const rv<T>& > { typedef T type; };
template< class T > struct remove_rvalue_reference< volatile rv<T>& > { typedef T type; };
template< class T > struct remove_rvalue_reference< const volatile rv<T>& >{ typedef T type; };
#endif // #ifndef BOOST_NO_RVALUE_REFERENCES
template <typename T>
typename boost::move_detail::add_rvalue_reference<T>::type declval();
}
// Ideas from Boost.Move review, Jeffrey Lee Hellrung:
//
//- TypeTraits metafunctions is_lvalue_reference, add_lvalue_reference, and remove_lvalue_reference ?
// Perhaps add_reference and remove_reference can be modified so that they behave wrt emulated rvalue
// references the same as wrt real rvalue references, i.e., add_reference< rv<T>& > -> T& rather than
// rv<T>& (since T&& & -> T&).
//
//- Add'l TypeTraits has_[trivial_]move_{constructor,assign}...?
//
//- An as_lvalue(T& x) function, which amounts to an identity operation in C++0x, but strips emulated
// rvalue references in C++03. This may be necessary to prevent "accidental moves".
} //namespace boost {
#if defined BOOST_MSVC
#pragma warning (pop)
#ifdef BOOST_INTERPROCESS_CRT_SECURE_NO_DEPRECATE
#undef BOOST_INTERPROCESS_CRT_SECURE_NO_DEPRECATE
#undef _CRT_SECURE_NO_DEPRECATE
#undef _SCL_SECURE_NO_WARNINGS
#undef BOOST_INTERPROCESS_CRT_SECURE_NO_DEPRECATE
#undef _CRT_SECURE_NO_DEPRECATE
#endif
#ifdef BOOST_INTERPROCESS_SCL_SECURE_NO_WARNINGS
#undef BOOST_INTERPROCESS_SCL_SECURE_NO_WARNINGS
#undef _SCL_SECURE_NO_WARNINGS
#endif
#endif