| #ifndef BOOST_TYPE_TRAITS_IS_LIST_CONSTRUCTIBLE_HPP_INCLUDED |
| #define BOOST_TYPE_TRAITS_IS_LIST_CONSTRUCTIBLE_HPP_INCLUDED |
| |
| // Copyright 2017 Peter Dimov |
| // |
| // 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 |
| |
| #include <boost/config.hpp> |
| #include <boost/config/workaround.hpp> |
| #include <boost/type_traits/integral_constant.hpp> |
| #include <boost/type_traits/declval.hpp> |
| #include <boost/type_traits/is_complete.hpp> |
| #include <boost/static_assert.hpp> |
| |
| namespace boost |
| { |
| |
| #if defined(BOOST_NO_SFINAE_EXPR) || defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_NO_CXX11_DECLTYPE) \ |
| || defined(BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX) || defined(BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS)\ |
| || BOOST_WORKAROUND(BOOST_GCC, < 40700) |
| |
| template<class T, class = void, class = void, class = void, class = void, class = void, class = void> struct is_list_constructible: false_type |
| { |
| BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_list_constructible must be complete types"); |
| }; |
| |
| #else |
| |
| namespace type_traits_detail |
| { |
| |
| template<class T, class... A, class = decltype( T{declval<A>()...} )> true_type is_list_constructible_impl( int ); |
| template<class T, class... A> false_type is_list_constructible_impl( ... ); |
| |
| } // namespace type_traits_detail |
| |
| template<class T, class... A> struct is_list_constructible: decltype( type_traits_detail::is_list_constructible_impl<T, A...>(0) ) |
| { |
| BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_list_constructible must be complete types"); |
| }; |
| |
| #endif |
| |
| } // namespace boost |
| |
| #endif // #ifndef BOOST_TYPE_TRAITS_IS_LIST_CONSTRUCTIBLE_HPP_INCLUDED |