| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03 |
| |
| // <utility> |
| |
| // template <class T1, class T2> struct pair |
| |
| // pair(pair&&) = default; |
| |
| #include <cassert> |
| #include <memory> |
| #include <type_traits> |
| #include <utility> |
| |
| #include "test_macros.h" |
| |
| struct Dummy { |
| Dummy(Dummy const&) = delete; |
| Dummy(Dummy &&) = default; |
| }; |
| |
| struct NotCopyOrMoveConstructible { |
| NotCopyOrMoveConstructible() = default; |
| NotCopyOrMoveConstructible(NotCopyOrMoveConstructible const&) = delete; |
| NotCopyOrMoveConstructible(NotCopyOrMoveConstructible&&) = delete; |
| }; |
| |
| int main(int, char**) |
| { |
| { |
| typedef std::pair<int, short> P1; |
| static_assert(std::is_move_constructible<P1>::value, ""); |
| P1 p1(3, static_cast<short>(4)); |
| P1 p2 = std::move(p1); |
| assert(p2.first == 3); |
| assert(p2.second == 4); |
| } |
| { |
| using P = std::pair<Dummy, int>; |
| static_assert(!std::is_copy_constructible<P>::value, ""); |
| static_assert(std::is_move_constructible<P>::value, ""); |
| } |
| { |
| // When constructing a pair containing a reference, we only bind the |
| // reference, so it doesn't matter whether the type is or isn't |
| // copy/move constructible. |
| { |
| using P = std::pair<NotCopyOrMoveConstructible&, int>; |
| static_assert(std::is_move_constructible<P>::value, ""); |
| |
| NotCopyOrMoveConstructible obj; |
| P p2{obj, 3}; |
| P p1(std::move(p2)); |
| assert(&p1.first == &obj); |
| assert(&p2.first == &obj); |
| } |
| { |
| using P = std::pair<NotCopyOrMoveConstructible&&, int>; |
| static_assert(std::is_move_constructible<P>::value, ""); |
| |
| NotCopyOrMoveConstructible obj; |
| P p2{std::move(obj), 3}; |
| P p1(std::move(p2)); |
| assert(&p1.first == &obj); |
| assert(&p2.first == &obj); |
| } |
| } |
| |
| return 0; |
| } |