| |
| // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000. |
| // Use, modification and distribution are 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). |
| // |
| // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| |
| #ifndef BOOST_TT_ADD_REFERENCE_HPP_INCLUDED |
| #define BOOST_TT_ADD_REFERENCE_HPP_INCLUDED |
| |
| #include <boost/detail/workaround.hpp> |
| #include <boost/config.hpp> |
| |
| namespace boost { |
| |
| namespace detail { |
| |
| // |
| // We can't filter out rvalue_references at the same level as |
| // references or we get ambiguities from msvc: |
| // |
| |
| template <typename T> |
| struct add_reference_impl |
| { |
| typedef T& type; |
| }; |
| |
| #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| template <typename T> |
| struct add_reference_impl<T&&> |
| { |
| typedef T&& type; |
| }; |
| #endif |
| |
| } // namespace detail |
| |
| template <class T> struct add_reference |
| { |
| typedef typename boost::detail::add_reference_impl<T>::type type; |
| }; |
| template <class T> struct add_reference<T&> |
| { |
| typedef T& type; |
| }; |
| |
| // these full specialisations are always required: |
| template <> struct add_reference<void> { typedef void type; }; |
| #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
| template <> struct add_reference<const void> { typedef const void type; }; |
| template <> struct add_reference<const volatile void> { typedef const volatile void type; }; |
| template <> struct add_reference<volatile void> { typedef volatile void type; }; |
| #endif |
| |
| } // namespace boost |
| |
| #endif // BOOST_TT_ADD_REFERENCE_HPP_INCLUDED |