| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // UNSUPPORTED: c++03 |
| 10 | |
| 11 | // <utility> |
| 12 | |
| 13 | // template <class T1, class T2> struct pair |
| 14 | |
| 15 | // explicit(see-below) constexpr pair(); |
| 16 | |
| 17 | // This test checks the conditional explicitness of std::pair's default |
| 18 | // constructor as introduced by the resolution of https://wg21.link/LWG2510. |
| 19 | |
| 20 | #include <utility> |
| 21 | |
| 22 | |
| 23 | struct ImplicitlyDefaultConstructible { |
| 24 | ImplicitlyDefaultConstructible() = default; |
| 25 | }; |
| 26 | |
| 27 | struct ExplicitlyDefaultConstructible { |
| 28 | explicit ExplicitlyDefaultConstructible() = default; |
| 29 | }; |
| 30 | |
| 31 | std::pair<ImplicitlyDefaultConstructible, ExplicitlyDefaultConstructible> test1() { return {}; } // expected-error 1 {{chosen constructor is explicit in copy-initialization}} |
| 32 | std::pair<ExplicitlyDefaultConstructible, ImplicitlyDefaultConstructible> test2() { return {}; } // expected-error 1 {{chosen constructor is explicit in copy-initialization}} |
| 33 | std::pair<ExplicitlyDefaultConstructible, ExplicitlyDefaultConstructible> test3() { return {}; } // expected-error 1 {{chosen constructor is explicit in copy-initialization}} |
| 34 | std::pair<ImplicitlyDefaultConstructible, ImplicitlyDefaultConstructible> test4() { return {}; } |
| 35 |