68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
/*!
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@file
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Defines macros for commonly used type traits.
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@copyright Louis Dionne 2013-2016
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_HANA_DETAIL_INTRINSICS_HPP
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#define BOOST_HANA_DETAIL_INTRINSICS_HPP
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#include <boost/hana/config.hpp>
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// We use intrinsics if they are available because it speeds up the
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// compile-times.
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#if defined(BOOST_HANA_CONFIG_CLANG)
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# if __has_extension(is_empty)
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# define BOOST_HANA_TT_IS_EMPTY(T) __is_empty(T)
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# endif
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# if __has_extension(is_final)
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# define BOOST_HANA_TT_IS_FINAL(T) __is_final(T)
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# endif
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// TODO: Right now, this intrinsic is never used directly because of
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// https://llvm.org/bugs/show_bug.cgi?id=24173
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# if __has_extension(is_constructible) && false
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# define BOOST_HANA_TT_IS_CONSTRUCTIBLE(...) __is_constructible(__VA_ARGS__)
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# endif
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# if __has_extension(is_assignable)
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# define BOOST_HANA_TT_IS_ASSIGNABLE(T, U) __is_assignable(T, U)
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# endif
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# if __has_extension(is_convertible)
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# define BOOST_HANA_TT_IS_CONVERTIBLE(T, U) __is_convertible(T, U)
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# endif
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#endif
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#if !defined(BOOST_HANA_TT_IS_EMPTY)
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# include <type_traits>
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# define BOOST_HANA_TT_IS_EMPTY(T) ::std::is_empty<T>::value
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#endif
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#if !defined(BOOST_HANA_TT_IS_FINAL)
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# include <type_traits>
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# define BOOST_HANA_TT_IS_FINAL(T) ::std::is_final<T>::value
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#endif
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#if !defined(BOOST_HANA_TT_IS_CONSTRUCTIBLE)
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# include <type_traits>
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# define BOOST_HANA_TT_IS_CONSTRUCTIBLE(...) ::std::is_constructible<__VA_ARGS__>::value
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#endif
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#if !defined(BOOST_HANA_TT_IS_ASSIGNABLE)
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# include <type_traits>
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# define BOOST_HANA_TT_IS_ASSIGNABLE(T, U) ::std::is_assignable<T, U>::value
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#endif
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#if !defined(BOOST_HANA_TT_IS_CONVERTIBLE)
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# include <type_traits>
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# define BOOST_HANA_TT_IS_CONVERTIBLE(T, U) ::std::is_convertible<T, U>::value
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#endif
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#endif // !BOOST_HANA_DETAIL_INTRINSICS_HPP
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