| // add_rvalue_reference.hpp ---------------------------------------------------------// |
| |
| // Copyright 2010 Vicente J. Botet Escriba |
| |
| // Distributed under the Boost Software License, Version 1.0. |
| // See http://www.boost.org/LICENSE_1_0.txt |
| |
| #ifndef BOOST_TYPE_TRAITS_EXT_ADD_RVALUE_REFERENCE__HPP |
| #define BOOST_TYPE_TRAITS_EXT_ADD_RVALUE_REFERENCE__HPP |
| |
| #include <boost/config.hpp> |
| |
| //----------------------------------------------------------------------------// |
| |
| #include <boost/type_traits/is_void.hpp> |
| #include <boost/type_traits/is_reference.hpp> |
| |
| // should be the last #include |
| #include <boost/type_traits/detail/type_trait_def.hpp> |
| |
| //----------------------------------------------------------------------------// |
| // // |
| // C++03 implementation of // |
| // 20.9.7.2 Reference modifications [meta.trans.ref] // |
| // Written by Vicente J. Botet Escriba // |
| // // |
| // If T names an object or function type then the member typedef type |
| // shall name T&&; otherwise, type shall name T. [ Note: This rule reflects |
| // the semantics of reference collapsing. For example, when a type T names |
| // a type T1&, the type add_rvalue_reference<T>::type is not an rvalue |
| // reference. -end note ] |
| //----------------------------------------------------------------------------// |
| |
| namespace boost { |
| |
| namespace type_traits_detail { |
| |
| template <typename T, bool b> |
| struct add_rvalue_reference_helper |
| { typedef T type; }; |
| |
| #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) |
| template <typename T> |
| struct add_rvalue_reference_helper<T, true> |
| { |
| typedef T&& type; |
| }; |
| #endif |
| |
| template <typename T> |
| struct add_rvalue_reference_imp |
| { |
| typedef typename boost::type_traits_detail::add_rvalue_reference_helper |
| <T, (is_void<T>::value == false && is_reference<T>::value == false) >::type type; |
| }; |
| |
| } |
| |
| BOOST_TT_AUX_TYPE_TRAIT_DEF1(add_rvalue_reference,T,typename boost::type_traits_detail::add_rvalue_reference_imp<T>::type) |
| |
| } // namespace boost |
| |
| #include <boost/type_traits/detail/type_trait_undef.hpp> |
| |
| #endif // BOOST_TYPE_TRAITS_EXT_ADD_RVALUE_REFERENCE__HPP |
| |