1 /* 2 * Distributed under the Boost Software License, Version 1.0. 3 * (See accompanying file LICENSE_1_0.txt or copy at 4 * http://www.boost.org/LICENSE_1_0.txt) 5 * 6 * Copyright (c) 2017 Andrey Semashev 7 */ 8 /*! 9 * \file atomic/detail/type_traits/conditional.hpp 10 * 11 * This header defines \c conditional type trait 12 */ 13 14 #ifndef BOOST_ATOMIC_DETAIL_TYPE_TRAITS_CONDITIONAL_HPP_INCLUDED_ 15 #define BOOST_ATOMIC_DETAIL_TYPE_TRAITS_CONDITIONAL_HPP_INCLUDED_ 16 17 #include <boost/atomic/detail/config.hpp> 18 #if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_HDR_TYPE_TRAITS) 19 #include <type_traits> 20 #else 21 #include <boost/type_traits/conditional.hpp> 22 #endif 23 24 #ifdef BOOST_HAS_PRAGMA_ONCE 25 #pragma once 26 #endif 27 28 namespace boost { 29 namespace atomics { 30 namespace detail { 31 32 #if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_BASIC_HDR_TYPE_TRAITS) 33 using std::conditional; 34 #else 35 using boost::conditional; 36 #endif 37 38 } // namespace detail 39 } // namespace atomics 40 } // namespace boost 41 42 #endif // BOOST_ATOMIC_DETAIL_TYPE_TRAITS_CONDITIONAL_HPP_INCLUDED_ 43