-// Copyright Louis Dionne 2013-2016
+// 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 <support/tracked_move_only.hpp>
#include <string>
+#include <type_traits>
#include <utility>
namespace hana = boost::hana;
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();
moved == hana::make_map(hana::make_pair(hana::int_c<2>, std::string{"abcdef"}))
);
}
+
+ {
+ using Map1 = hana::map<hana::pair<NoMove, NoMove>>;
+ Map1 map1;
+ static_assert(!std::is_move_constructible<Map1>::value, "");
+
+ using Map2 = hana::map<hana::pair<NoMove_nonempty, NoMove_nonempty>>;
+ Map2 map2;
+ static_assert(!std::is_move_constructible<Map2>::value, "");
+ }
}