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Current File : //backups/router/usr/local/include/boost/hana/fwd/erase_key.hpp

/*!
@file
Forward declares `boost::hana::erase_key`.

Copyright Louis Dionne 2013-2022
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_FWD_ERASE_KEY_HPP
#define BOOST_HANA_FWD_ERASE_KEY_HPP

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


namespace boost { namespace hana {
    // Note: This function is documented per datatype/concept only.
    //! @cond
    template <typename T, typename = void>
    struct erase_key_impl : erase_key_impl<T, when<true>> { };
    //! @endcond

    struct erase_key_t {
        template <typename Set, typename ...Args>
        constexpr decltype(auto) operator()(Set&& set, Args&& ...args) const;
    };

    BOOST_HANA_INLINE_VARIABLE constexpr erase_key_t erase_key{};
}} // end namespace boost::hana

#endif // !BOOST_HANA_FWD_ERASE_KEY_HPP

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