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- /*!
- @file
- Forward declares `boost::hana::members`.
- @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_FWD_MEMBERS_HPP
- #define BOOST_HANA_FWD_MEMBERS_HPP
- #include <boost/hana/config.hpp>
- #include <boost/hana/core/when.hpp>
- BOOST_HANA_NAMESPACE_BEGIN
- //! Returns a `Sequence` containing the members of a `Struct`.
- //! @ingroup group-Struct
- //!
- //! Given a `Struct` object, `members` returns a `Sequence` containing
- //! all the members of the `Struct`, in the same order as their respective
- //! accessor appears in the `accessors` sequence.
- //!
- //!
- //! Example
- //! -------
- //! @include example/members.cpp
- #ifdef BOOST_HANA_DOXYGEN_INVOKED
- constexpr auto members = [](auto&& object) {
- return tag-dispatched;
- };
- #else
- template <typename S, typename = void>
- struct members_impl : members_impl<S, when<true>> { };
- struct members_t {
- template <typename Object>
- constexpr auto operator()(Object&& object) const;
- };
- constexpr members_t members{};
- #endif
- BOOST_HANA_NAMESPACE_END
- #endif // !BOOST_HANA_FWD_MEMBERS_HPP
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