FM / hana

/usr/include/boost/hana

Name	Size	Mode	Actions
concept/	-	0755	rm
core/	-	0755	rm
detail/	-	0755	rm
experimental/	-	0755	rm
ext/	-	0755	rm
functional/	-	0755	rm
fwd/	-	0755	rm
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Edit: /usr/include/boost/hana/sum.hpp (1661B)

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

@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_SUM_HPP
#define BOOST_HANA_SUM_HPP

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

#include <boost/hana/concept/foldable.hpp>
#include <boost/hana/concept/monoid.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/fold_left.hpp>
#include <boost/hana/integral_constant.hpp> // required by fwd decl
#include <boost/hana/plus.hpp>
#include <boost/hana/zero.hpp>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename M>
    template <typename Xs>
    constexpr decltype(auto) sum_t<M>::operator()(Xs&& xs) const {
        using S = typename hana::tag_of<Xs>::type;
        using Sum = BOOST_HANA_DISPATCH_IF(sum_impl<S>,
            hana::Foldable<S>::value
        );

#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
        static_assert(hana::Monoid<M>::value,
        "hana::sum<M> requires 'M' to be a Monoid");

static_assert(hana::Foldable<S>::value,
        "hana::sum<M>(xs) requires 'xs' to be Foldable");
    #endif

return Sum::template apply<M>(static_cast<Xs&&>(xs));
    }
    //! @endcond

template <typename T, bool condition>
    struct sum_impl<T, when<condition>> : default_ {
        template <typename M, typename Xs>
        static constexpr decltype(auto) apply(Xs&& xs) {
            return hana::fold_left(static_cast<Xs&&>(xs), hana::zero<M>(), hana::plus);
        }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_SUM_HPP

/*! @file Defines `boost::hana::sum`. @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_SUM_HPP #define BOOST_HANA_SUM_HPP #include #include #include #include #include #include #include // required by fwd decl #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template template constexpr decltype(auto) sum_t::operator()(Xs&& xs) const { using S = typename hana::tag_of::type; using Sum = BOOST_HANA_DISPATCH_IF(sum_impl, hana::Foldable::value ); #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS static_assert(hana::Monoid::value, "hana::sum requires 'M' to be a Monoid"); static_assert(hana::Foldable::value, "hana::sum(xs) requires 'xs' to be Foldable"); #endif return Sum::template apply(static_cast(xs)); } //! @endcond template struct sum_impl> : default_ { template static constexpr decltype(auto) apply(Xs&& xs) { return hana::fold_left(static_cast(xs), hana::zero(), hana::plus); } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_SUM_HPP