| /* |
| Copyright 2019 Glen Joseph Fernandes |
| (glenjofe@gmail.com) |
| |
| Distributed under the Boost Software License, |
| Version 1.0. (See accompanying file LICENSE_1_0.txt |
| or copy at http://www.boost.org/LICENSE_1_0.txt) |
| */ |
| #ifndef BOOST_TT_COPY_REFERENCE_HPP_INCLUDED |
| #define BOOST_TT_COPY_REFERENCE_HPP_INCLUDED |
| |
| #include <boost/type_traits/add_lvalue_reference.hpp> |
| #include <boost/type_traits/add_rvalue_reference.hpp> |
| #include <boost/type_traits/is_lvalue_reference.hpp> |
| #include <boost/type_traits/is_rvalue_reference.hpp> |
| #include <boost/type_traits/conditional.hpp> |
| |
| namespace boost { |
| |
| template<class T, class U> |
| struct copy_reference { |
| typedef typename conditional<is_rvalue_reference<U>::value, |
| typename add_rvalue_reference<T>::type, |
| typename conditional<is_lvalue_reference<U>::value, |
| typename add_lvalue_reference<T>::type, T>::type>::type type; |
| }; |
| |
| #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) |
| template<class T, class U> |
| using copy_reference_t = typename copy_reference<T, U>::type; |
| #endif |
| |
| } /* boost */ |
| |
| #endif |
