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99dee823 | 1 | // Copyright (C) 2017-2021 Free Software Foundation, Inc. |
1dd95239 VV |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
af181c91 | 18 | // { dg-options "-std=gnu++17" } |
7b936140 | 19 | // { dg-do compile { target c++17 } } |
1dd95239 | 20 | |
af181c91 | 21 | #include <mutex> |
1dd95239 | 22 | |
af181c91 JW |
23 | template<typename T, typename U> struct require_same; |
24 | template<typename T> struct require_same<T, T> { using type = void; }; | |
25 | ||
26 | template<typename T, typename U> | |
27 | typename require_same<T, U>::type | |
28 | check_type(U&) { } | |
29 | ||
30 | void | |
31 | test01() | |
1dd95239 | 32 | { |
af181c91 JW |
33 | std::mutex m; |
34 | std::unique_lock l(m); | |
35 | check_type<std::unique_lock<std::mutex>>(l); | |
36 | ||
37 | struct Mutex { | |
38 | void lock() { } | |
39 | void unlock() { } | |
40 | } m2; | |
41 | ||
42 | std::unique_lock l2(m2); | |
43 | check_type<std::unique_lock<Mutex>>(l2); | |
1dd95239 | 44 | } |