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 // <shared_mutex>
11 
12 // template <class Mutex> class shared_lock;
13 
14 // shared_lock(shared_lock const&) = delete;
15 
16 #include <shared_mutex>
17 
18 #if _LIBCPP_STD_VER > 11
19 std::shared_timed_mutex m;
20 #endif  // _LIBCPP_STD_VER > 11
21 
main()22 int main()
23 {
24 #if _LIBCPP_STD_VER > 11
25     std::shared_lock<std::shared_timed_mutex> lk0(m);
26     std::shared_lock<std::shared_timed_mutex> lk = lk0;
27 #else
28 #   error
29 #endif  // _LIBCPP_STD_VER > 11
30 }
31