63e88f80
 Hu Chunming
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/*!
@file
Defines macros for commonly used type traits.
Copyright Louis Dionne 2013-2022
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_HANA_DETAIL_INTRINSICS_HPP
#define BOOST_HANA_DETAIL_INTRINSICS_HPP
#include <boost/hana/config.hpp>
// We use intrinsics if they are available because it speeds up the
// compile-times.
#if defined(BOOST_HANA_CONFIG_CLANG)
# if __has_extension(is_empty)
# define BOOST_HANA_TT_IS_EMPTY(T) __is_empty(T)
# endif
# if __has_extension(is_final)
# define BOOST_HANA_TT_IS_FINAL(T) __is_final(T)
# endif
// TODO: Right now, this intrinsic is never used directly because of
// https://llvm.org/bugs/show_bug.cgi?id=24173
# if __has_extension(is_constructible) && false
# define BOOST_HANA_TT_IS_CONSTRUCTIBLE(...) __is_constructible(__VA_ARGS__)
# endif
# if __has_extension(is_assignable)
# define BOOST_HANA_TT_IS_ASSIGNABLE(T, U) __is_assignable(T, U)
# endif
# if __has_extension(is_convertible)
# define BOOST_HANA_TT_IS_CONVERTIBLE(T, U) __is_convertible(T, U)
# endif
#endif
#if !defined(BOOST_HANA_TT_IS_EMPTY)
# include <type_traits>
# define BOOST_HANA_TT_IS_EMPTY(T) ::std::is_empty<T>::value
#endif
#if !defined(BOOST_HANA_TT_IS_FINAL)
# include <type_traits>
# define BOOST_HANA_TT_IS_FINAL(T) ::std::is_final<T>::value
#endif
#if !defined(BOOST_HANA_TT_IS_CONSTRUCTIBLE)
# include <type_traits>
# define BOOST_HANA_TT_IS_CONSTRUCTIBLE(...) ::std::is_constructible<__VA_ARGS__>::value
#endif
#if !defined(BOOST_HANA_TT_IS_ASSIGNABLE)
# include <type_traits>
# define BOOST_HANA_TT_IS_ASSIGNABLE(T, U) ::std::is_assignable<T, U>::value
#endif
#if !defined(BOOST_HANA_TT_IS_CONVERTIBLE)
# include <type_traits>
# define BOOST_HANA_TT_IS_CONVERTIBLE(T, U) ::std::is_convertible<T, U>::value
#endif
#endif // !BOOST_HANA_DETAIL_INTRINSICS_HPP
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