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- // 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 TEST_SUPPORT_CONSTEXPR_MOVE_ONLY_HPP
- #define TEST_SUPPORT_CONSTEXPR_MOVE_ONLY_HPP
- #include <boost/hana/bool.hpp>
- #include <boost/hana/fwd/hash.hpp>
- #include <boost/hana/type.hpp>
- #include <utility>
- // A move-only type that's also a literal type. It is also Comparable and
- // Hashable so it can be used in associative containers.
- template <int i>
- struct ConstexprMoveOnly {
- constexpr ConstexprMoveOnly() { }
- constexpr ConstexprMoveOnly(ConstexprMoveOnly const&) = delete;
- constexpr ConstexprMoveOnly& operator=(ConstexprMoveOnly const&) = delete;
- constexpr ConstexprMoveOnly(ConstexprMoveOnly&&) { }
- };
- template <int i, int j>
- constexpr auto operator==(ConstexprMoveOnly<i> const&, ConstexprMoveOnly<j> const&)
- { return boost::hana::bool_c<i == j>; }
- template <int i, int j>
- constexpr auto operator!=(ConstexprMoveOnly<i> const&, ConstexprMoveOnly<j> const&)
- { return boost::hana::bool_c<i != j>; }
- namespace boost { namespace hana {
- template <int i>
- struct hash_impl<ConstexprMoveOnly<i>> {
- static constexpr auto apply(ConstexprMoveOnly<i> const&)
- { return hana::type_c<ConstexprMoveOnly<i>>; };
- };
- }}
- #endif // !TEST_SUPPORT_CONSTEXPR_MOVE_ONLY_HPP
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