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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)
- #include <boost/hana/assert.hpp>
- #include <boost/hana/bool.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/fwd/hash.hpp>
- #include <boost/hana/map.hpp>
- #include <boost/hana/pair.hpp>
- #include <boost/hana/type.hpp>
- #include <support/constexpr_move_only.hpp>
- #include <support/tracked_move_only.hpp>
- #include <string>
- #include <type_traits>
- #include <utility>
- namespace hana = boost::hana;
- constexpr bool in_constexpr_context() {
- auto t0 = hana::make_map(
- hana::make_pair(ConstexprMoveOnly<2>{}, ConstexprMoveOnly<20>{}),
- hana::make_pair(ConstexprMoveOnly<3>{}, ConstexprMoveOnly<30>{}));
- auto t_implicit = std::move(t0);
- auto t_explicit(std::move(t_implicit));
- (void)t_implicit;
- (void)t_explicit;
- return true;
- }
- static_assert(in_constexpr_context(), "");
- struct NoMove {
- NoMove() = default;
- NoMove(NoMove const&) = delete;
- NoMove(NoMove&&) = delete;
- friend auto operator==(NoMove const&, NoMove const&) { return hana::true_c; }
- friend auto operator!=(NoMove const&, NoMove const&) { return hana::false_c; }
- };
- // Note: It is also useful to check with a non-empty class, because that
- // triggers different instantiations due to EBO.
- struct NoMove_nonempty {
- NoMove_nonempty() = default;
- NoMove_nonempty(NoMove_nonempty const&) = delete;
- NoMove_nonempty(NoMove_nonempty&&) = delete;
- int i;
- friend auto operator==(NoMove_nonempty const&, NoMove_nonempty const&) { return hana::true_c; }
- friend auto operator!=(NoMove_nonempty const&, NoMove_nonempty const&) { return hana::false_c; }
- };
- namespace boost { namespace hana {
- template <>
- struct hash_impl<NoMove> {
- static constexpr auto apply(NoMove const&)
- { return hana::type_c<NoMove>; };
- };
- template <>
- struct hash_impl<NoMove_nonempty> {
- static constexpr auto apply(NoMove_nonempty const&)
- { return hana::type_c<NoMove_nonempty>; };
- };
- }}
- int main() {
- {
- auto t0 = hana::make_map();
- auto t_implicit = std::move(t0);
- auto t_explicit(std::move(t_implicit));
- (void)t_explicit;
- (void)t_implicit;
- }
- {
- auto t0 = hana::make_map(hana::make_pair(TrackedMoveOnly<1>{}, TrackedMoveOnly<10>{}));
- auto t_implicit = std::move(t0);
- auto t_explicit(std::move(t_implicit));
- (void)t_implicit;
- (void)t_explicit;
- }
- {
- auto t0 = hana::make_map(hana::make_pair(TrackedMoveOnly<1>{}, TrackedMoveOnly<10>{}),
- hana::make_pair(TrackedMoveOnly<2>{}, TrackedMoveOnly<20>{}));
- auto t_implicit = std::move(t0);
- auto t_explicit(std::move(t_implicit));
- (void)t_implicit;
- (void)t_explicit;
- }
- {
- auto t0 = hana::make_map(hana::make_pair(TrackedMoveOnly<1>{}, TrackedMoveOnly<10>{}),
- hana::make_pair(TrackedMoveOnly<2>{}, TrackedMoveOnly<20>{}),
- hana::make_pair(TrackedMoveOnly<3>{}, TrackedMoveOnly<30>{}));
- auto t_implicit = std::move(t0);
- auto t_explicit(std::move(t_implicit));
- (void)t_implicit;
- (void)t_explicit;
- }
- {
- auto t0 = hana::make_map(hana::make_pair(hana::int_c<2>, std::string{"abcdef"}));
- auto moved = std::move(t0);
- BOOST_HANA_RUNTIME_CHECK(
- moved == hana::make_map(hana::make_pair(hana::int_c<2>, std::string{"abcdef"}))
- );
- }
- {
- using Map1 = hana::map<hana::pair<NoMove, NoMove>>;
- Map1 map1; (void)map1;
- static_assert(!std::is_move_constructible<Map1>::value, "");
- using Map2 = hana::map<hana::pair<NoMove_nonempty, NoMove_nonempty>>;
- Map2 map2; (void)map2;
- static_assert(!std::is_move_constructible<Map2>::value, "");
- }
- }
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