124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
// 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, "");
|
|
}
|
|
}
|