boost/hana/detail/intrinsics.hpp
/*! @file Defines macros for commonly used type traits. @copyright Louis Dionne 2013-2017 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