1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // UNSUPPORTED: libcpp-has-no-threads
11 // UNSUPPORTED: c++98, c++03, c++11, c++14
12 
13 // <mutex>
14 
15 // template <class ...Mutex> class scoped_lock;
16 
17 // explicit scoped_lock(Mutex&...);
18 
19 #include <mutex>
20 #include "test_macros.h"
21 
22 template <class LG>
23 void test_conversion(LG) {}
24 
25 int main()
26 {
27     using M = std::mutex;
28     M m0, m1, m2;
29     M n0, n1, n2;
30     {
31         using LG = std::scoped_lock<>;
32         LG lg = {}; // expected-error{{chosen constructor is explicit in copy-initialization}}
33         test_conversion<LG>({}); // expected-error{{no matching function for call}}
34         ((void)lg);
35     }
36     {
37         using LG = std::scoped_lock<M>;
38         LG lg = {m0}; // expected-error{{chosen constructor is explicit in copy-initialization}}
39         test_conversion<LG>({n0}); // expected-error{{no matching function for call}}
40         ((void)lg);
41     }
42     {
43         using LG = std::scoped_lock<M, M>;
44         LG lg = {m0, m1}; // expected-error{{chosen constructor is explicit in copy-initialization}}
45         test_conversion<LG>({n0, n1}); // expected-error{{no matching function for call}}
46         ((void)lg);
47     }
48     {
49         using LG = std::scoped_lock<M, M, M>;
50         LG lg = {m0, m1, m2}; // expected-error{{chosen constructor is explicit in copy-initialization}}
51         test_conversion<LG>({n0, n1, n2}); // expected-error{{no matching function for call}}
52     }
53 }
54