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: no-threads
10// UNSUPPORTED: c++03, c++11, c++14
11
12// <mutex>
13
14// template <class ...Mutex> class scoped_lock;
15
16// explicit scoped_lock(Mutex&...);
17
18#include <mutex>
19#include "test_macros.h"
20
21template <class LG>
22void test_conversion(LG) {}
23
24int main(int, char**)
25{
26 using M = std::mutex;
27 M m0, m1, m2;
28 M n0, n1, n2;
29 {
30 using LG = std::scoped_lock<>;
31 LG lg = {}; // expected-error{{chosen constructor is explicit in copy-initialization}}
32 test_conversion<LG>({}); // expected-error{{no matching function for call}}
33 ((void)lg);
34 }
35 {
36 using LG = std::scoped_lock<M>;
37 LG lg = {m0}; // expected-error{{chosen constructor is explicit in copy-initialization}}
38 test_conversion<LG>({n0}); // expected-error{{no matching function for call}}
39 ((void)lg);
40 }
41 {
42 using LG = std::scoped_lock<M, M>;
43 LG lg = {m0, m1}; // expected-error{{chosen constructor is explicit in copy-initialization}}
44 test_conversion<LG>({n0, n1}); // expected-error{{no matching function for call}}
45 ((void)lg);
46 }
47 {
48 using LG = std::scoped_lock<M, M, M>;
49 LG lg = {m0, m1, m2}; // expected-error{{chosen constructor is explicit in copy-initialization}}
50 test_conversion<LG>({n0, n1, n2}); // expected-error{{no matching function for call}}
51 }
52
53 return 0;
54}
55

source code of libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.scoped/mutex.verify.cpp