| 1234567891011121314151617181920212223242526272829303132 | /*!@fileForward declares `boost::hana::intersection`.@copyright Louis Dionne 2013-2017Distributed 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_INTERSECTION_HPP#define BOOST_HANA_FWD_INTERSECTION_HPP#include <boost/hana/config.hpp>#include <boost/hana/core/when.hpp>BOOST_HANA_NAMESPACE_BEGIN    // Note: This function is documented per datatype/concept only.    //! @cond    template <typename S, typename = void>    struct intersection_impl : intersection_impl<S, when<true>> { };    //! @endcond    struct intersection_t {        template <typename Xs, typename Ys>        constexpr auto operator()(Xs&&, Ys&&) const;    };    constexpr intersection_t intersection{};BOOST_HANA_NAMESPACE_END#endif // !BOOST_HANA_FWD_INTERSECTION_HPP
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