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- /*
- 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
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