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Diffstat (limited to 'boost/atomic/detail/type_traits/is_iec559.hpp')
-rw-r--r-- | boost/atomic/detail/type_traits/is_iec559.hpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/boost/atomic/detail/type_traits/is_iec559.hpp b/boost/atomic/detail/type_traits/is_iec559.hpp new file mode 100644 index 0000000000..299c4f0f4f --- /dev/null +++ b/boost/atomic/detail/type_traits/is_iec559.hpp @@ -0,0 +1,47 @@ +/* + * 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) + * + * Copyright (c) 2018 Andrey Semashev + */ +/*! + * \file atomic/detail/type_traits/is_iec559.hpp + * + * This header defines \c is_iec559 type trait + */ + +#ifndef BOOST_ATOMIC_DETAIL_TYPE_TRAITS_IS_IEC559_HPP_INCLUDED_ +#define BOOST_ATOMIC_DETAIL_TYPE_TRAITS_IS_IEC559_HPP_INCLUDED_ + +#include <limits> +#include <boost/atomic/detail/config.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +namespace boost { +namespace atomics { +namespace detail { + +template< typename T > +struct is_iec559 +{ + static BOOST_CONSTEXPR_OR_CONST bool value = !!std::numeric_limits< T >::is_iec559; +}; + +#if defined(BOOST_HAS_FLOAT128) +// libstdc++ does not specialize numeric_limits for __float128 +template< > +struct is_iec559< boost::float128_type > +{ + static BOOST_CONSTEXPR_OR_CONST bool value = true; +}; +#endif // defined(BOOST_HAS_FLOAT128) + +} // namespace detail +} // namespace atomics +} // namespace boost + +#endif // BOOST_ATOMIC_DETAIL_TYPE_TRAITS_IS_IEC559_HPP_INCLUDED_ |