FM / core

/usr/include/boost/hana/core

Name	Size	Mode	Actions
common.hpp	3477	0644	edit dl rm
default.hpp	767	0644	edit dl rm
dispatch.hpp	520	0644	edit dl rm
is_a.hpp	1135	0644	edit dl rm
make.hpp	1350	0644	edit dl rm
tag_of.hpp	1389	0644	edit dl rm
to.hpp	8156	0644	edit dl rm
when.hpp	391	0644	edit dl rm

Edit: /usr/include/boost/hana/core/tag_of.hpp (1389B)

/*!
@file
Defines `boost::hana::tag_of` and `boost::hana::tag_of_t`.

@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_CORE_TAG_OF_HPP
#define BOOST_HANA_CORE_TAG_OF_HPP

#include <boost/hana/fwd/core/tag_of.hpp>

#include <boost/hana/config.hpp>
#include <boost/hana/core/when.hpp>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename T, typename>
    struct tag_of : tag_of<T, when<true>> { };
    //! @endcond

namespace core_detail {
        template <typename ...>
        struct is_valid { static constexpr bool value = true; };
    }

template <typename T, bool condition>
    struct tag_of<T, when<condition>> {
        using type = T;
    };

template <typename T>
    struct tag_of<T, when<
        core_detail::is_valid<typename T::hana_tag>::value
    >> {
        using type = typename T::hana_tag;
    };

template <typename T> struct tag_of<T const> : tag_of<T> { };
    template <typename T> struct tag_of<T volatile> : tag_of<T> { };
    template <typename T> struct tag_of<T const volatile> : tag_of<T> { };
    template <typename T> struct tag_of<T&> : tag_of<T> { };
    template <typename T> struct tag_of<T&&> : tag_of<T> { };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_CORE_TAG_OF_HPP

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