FM / hana

/usr/include/boost/hana

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core/	-	0755	rm
detail/	-	0755	rm
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functional/	-	0755	rm
fwd/	-	0755	rm
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Edit: /usr/include/boost/hana/negate.hpp (1857B)

/*!
@file
Defines `boost::hana::negate`.

@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_NEGATE_HPP
#define BOOST_HANA_NEGATE_HPP

#include <boost/hana/fwd/negate.hpp>

#include <boost/hana/concept/group.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/fwd/minus.hpp>
#include <boost/hana/zero.hpp>

#include <type_traits>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename X>
    constexpr decltype(auto) negate_t::operator()(X&& x) const {
        using G = typename hana::tag_of<X>::type;
        using Negate = BOOST_HANA_DISPATCH_IF(negate_impl<G>,
            hana::Group<G>::value
        );

#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
        static_assert(hana::Group<G>::value,
        "hana::negate(x) requires 'x' to be in a Group");
    #endif

return Negate::apply(static_cast<X&&>(x));
    }
    //! @endcond

template <typename T, bool condition>
    struct negate_impl<T, when<condition>> : default_ {
        template <typename X>
        static constexpr decltype(auto) apply(X&& x)
        { return hana::minus(hana::zero<T>(), static_cast<X&&>(x)); }
    };

//////////////////////////////////////////////////////////////////////////
    // Model for arithmetic data types
    //////////////////////////////////////////////////////////////////////////
    template <typename T>
    struct negate_impl<T, when<std::is_arithmetic<T>::value &&
                               !std::is_same<bool, T>::value>> {
        template <typename X>
        static constexpr decltype(auto) apply(X&& x)
        { return -static_cast<X&&>(x); }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_NEGATE_HPP

/*! @file Defines `boost::hana::negate`. @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_NEGATE_HPP #define BOOST_HANA_NEGATE_HPP #include #include #include #include #include #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template constexpr decltype(auto) negate_t::operator()(X&& x) const { using G = typename hana::tag_of::type; using Negate = BOOST_HANA_DISPATCH_IF(negate_impl, hana::Group::value ); #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS static_assert(hana::Group::value, "hana::negate(x) requires 'x' to be in a Group"); #endif return Negate::apply(static_cast(x)); } //! @endcond template struct negate_impl> : default_ { template static constexpr decltype(auto) apply(X&& x) { return hana::minus(hana::zero(), static_cast(x)); } }; ////////////////////////////////////////////////////////////////////////// // Model for arithmetic data types ////////////////////////////////////////////////////////////////////////// template struct negate_impl::value && !std::is_same::value>> { template static constexpr decltype(auto) apply(X&& x) { return -static_cast(x); } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_NEGATE_HPP