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
accessors.hpp	1513	0644	edit dl rm
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Edit: /usr/include/boost/hana/none.hpp (1340B)

/*!
@file
Defines `boost::hana::none`.

@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_NONE_HPP
#define BOOST_HANA_NONE_HPP

#include <boost/hana/fwd/none.hpp>

#include <boost/hana/concept/searchable.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/functional/id.hpp>
#include <boost/hana/none_of.hpp>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename Xs>
    constexpr auto none_t::operator()(Xs&& xs) const {
        using S = typename hana::tag_of<Xs>::type;
        using None = BOOST_HANA_DISPATCH_IF(none_impl<S>,
            hana::Searchable<S>::value
        );

#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
        static_assert(hana::Searchable<S>::value,
        "hana::none(xs) requires 'xs' to be a Searchable");
    #endif

return None::apply(static_cast<Xs&&>(xs));
    }
    //! @endcond

template <typename S, bool condition>
    struct none_impl<S, when<condition>> : default_ {
        template <typename Xs>
        static constexpr auto apply(Xs&& xs)
        { return hana::none_of(static_cast<Xs&&>(xs), hana::id); }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_NONE_HPP

/*! @file Defines `boost::hana::none`. @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_NONE_HPP #define BOOST_HANA_NONE_HPP #include #include #include #include #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template constexpr auto none_t::operator()(Xs&& xs) const { using S = typename hana::tag_of::type; using None = BOOST_HANA_DISPATCH_IF(none_impl, hana::Searchable::value ); #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS static_assert(hana::Searchable::value, "hana::none(xs) requires 'xs' to be a Searchable"); #endif return None::apply(static_cast(xs)); } //! @endcond template struct none_impl> : default_ { template static constexpr auto apply(Xs&& xs) { return hana::none_of(static_cast(xs), hana::id); } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_NONE_HPP