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/usr/include/boost/hana

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core/	-	0755	rm
detail/	-	0755	rm
experimental/	-	0755	rm
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functional/	-	0755	rm
fwd/	-	0755	rm
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Edit: /usr/include/boost/hana/mult.hpp (3747B)

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

@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_MULT_HPP
#define BOOST_HANA_MULT_HPP

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

#include <boost/hana/concept/constant.hpp>
#include <boost/hana/concept/ring.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/to.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/detail/canonical_constant.hpp>
#include <boost/hana/detail/has_common_embedding.hpp>
#include <boost/hana/value.hpp>

#include <type_traits>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename X, typename Y>
    constexpr decltype(auto) mult_t::operator()(X&& x, Y&& y) const {
        using T = typename hana::tag_of<X>::type;
        using U = typename hana::tag_of<Y>::type;
        using Mult = BOOST_HANA_DISPATCH_IF(decltype(mult_impl<T, U>{}),
            hana::Ring<T>::value &&
            hana::Ring<U>::value &&
            !is_default<mult_impl<T, U>>::value
        );

#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
        static_assert(hana::Ring<T>::value,
        "hana::mult(x, y) requires 'x' to be in a Ring");

static_assert(hana::Ring<U>::value,
        "hana::mult(x, y) requires 'y' to be in a Ring");

static_assert(!is_default<mult_impl<T, U>>::value,
        "hana::mult(x, y) requires 'x' and 'y' to be embeddable "
        "in a common Ring");
    #endif

return Mult::apply(static_cast<X&&>(x), static_cast<Y&&>(y));
    }
    //! @endcond

template <typename T, typename U, bool condition>
    struct mult_impl<T, U, when<condition>> : default_ {
        template <typename ...Args>
        static constexpr auto apply(Args&& ...) = delete;
    };

// Cross-type overload
    template <typename T, typename U>
    struct mult_impl<T, U, when<
        detail::has_nontrivial_common_embedding<Ring, T, U>::value
    >> {
        using C = typename common<T, U>::type;
        template <typename X, typename Y>
        static constexpr decltype(auto) apply(X&& x, Y&& y) {
            return hana::mult(hana::to<C>(static_cast<X&&>(x)),
                              hana::to<C>(static_cast<Y&&>(y)));
        }
    };

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

//////////////////////////////////////////////////////////////////////////
    // Model for Constants over a Ring
    //////////////////////////////////////////////////////////////////////////
    namespace detail {
        template <typename C, typename X, typename Y>
        struct constant_from_mult {
            static constexpr auto value = hana::mult(hana::value<X>(), hana::value<Y>());
            using hana_tag = detail::CanonicalConstant<typename C::value_type>;
        };
    }

template <typename C>
    struct mult_impl<C, C, when<
        hana::Constant<C>::value &&
        Ring<typename C::value_type>::value
    >> {
        template <typename X, typename Y>
        static constexpr decltype(auto) apply(X const&, Y const&)
        { return hana::to<C>(detail::constant_from_mult<C, X, Y>{}); }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_MULT_HPP

/*! @file Defines `boost::hana::mult`. @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_MULT_HPP #define BOOST_HANA_MULT_HPP #include #include #include #include #include #include #include #include #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template constexpr decltype(auto) mult_t::operator()(X&& x, Y&& y) const { using T = typename hana::tag_of::type; using U = typename hana::tag_of::type; using Mult = BOOST_HANA_DISPATCH_IF(decltype(mult_impl{}), hana::Ring::value && hana::Ring::value && !is_default>::value ); #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS static_assert(hana::Ring::value, "hana::mult(x, y) requires 'x' to be in a Ring"); static_assert(hana::Ring::value, "hana::mult(x, y) requires 'y' to be in a Ring"); static_assert(!is_default>::value, "hana::mult(x, y) requires 'x' and 'y' to be embeddable " "in a common Ring"); #endif return Mult::apply(static_cast(x), static_cast(y)); } //! @endcond template struct mult_impl> : default_ { template static constexpr auto apply(Args&& ...) = delete; }; // Cross-type overload template struct mult_impl::value >> { using C = typename common::type; template static constexpr decltype(auto) apply(X&& x, Y&& y) { return hana::mult(hana::to(static_cast(x)), hana::to(static_cast(y))); } }; ////////////////////////////////////////////////////////////////////////// // Model for non-boolean arithmetic data types ////////////////////////////////////////////////////////////////////////// template struct mult_impl::value && !std::is_same::value>> { template static constexpr decltype(auto) apply(X&& x, Y&& y) { return static_cast(x) * static_cast(y); } }; ////////////////////////////////////////////////////////////////////////// // Model for Constants over a Ring ////////////////////////////////////////////////////////////////////////// namespace detail { template struct constant_from_mult { static constexpr auto value = hana::mult(hana::value(), hana::value()); using hana_tag = detail::CanonicalConstant; }; } template struct mult_impl::value && Ring::value >> { template static constexpr decltype(auto) apply(X const&, Y const&) { return hana::to(detail::constant_from_mult{}); } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_MULT_HPP