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/duplicate.hpp (1392B)

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

@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_DUPLICATE_HPP
#define BOOST_HANA_DUPLICATE_HPP

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

#include <boost/hana/concept/comonad.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/extend.hpp>
#include <boost/hana/functional/id.hpp>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename W_>
    constexpr decltype(auto) duplicate_t::operator()(W_&& w) const {
        using W = typename hana::tag_of<W_>::type;
        using Duplicate = BOOST_HANA_DISPATCH_IF(duplicate_impl<W>,
            hana::Comonad<W>::value
        );

#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
        static_assert(hana::Comonad<W>::value,
        "hana::duplicate(w) requires 'w' to be a Comonad");
    #endif

return Duplicate::apply(static_cast<W_&&>(w));
    }
    //! @endcond

template <typename W, bool condition>
    struct duplicate_impl<W, when<condition>> : default_ {
        template <typename X>
        static constexpr decltype(auto) apply(X&& x)
        { return hana::extend(static_cast<X&&>(x), hana::id); }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_DUPLICATE_HPP

/*! @file Defines `boost::hana::duplicate`. @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_DUPLICATE_HPP #define BOOST_HANA_DUPLICATE_HPP #include #include #include #include #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template constexpr decltype(auto) duplicate_t::operator()(W_&& w) const { using W = typename hana::tag_of::type; using Duplicate = BOOST_HANA_DISPATCH_IF(duplicate_impl, hana::Comonad::value ); #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS static_assert(hana::Comonad::value, "hana::duplicate(w) requires 'w' to be a Comonad"); #endif return Duplicate::apply(static_cast(w)); } //! @endcond template struct duplicate_impl> : default_ { template static constexpr decltype(auto) apply(X&& x) { return hana::extend(static_cast(x), hana::id); } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_DUPLICATE_HPP