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 // <mutex>
10 
11 // template <class Mutex> class unique_lock;
12 
13 // unique_lock();
14 
15 #include <cassert>
16 #include <mutex>
17 #include <type_traits>
18 
19 #include "checking_mutex.h"
20 #include "test_macros.h"
21 
22 #if TEST_STD_VER >= 11
23 static_assert(std::is_nothrow_default_constructible<std::unique_lock<checking_mutex>>::value, "");
24 #endif
25 
26 int main(int, char**) {
27   std::unique_lock<checking_mutex> ul;
28   assert(!ul.owns_lock());
29   assert(ul.mutex() == nullptr);
30 
31   return 0;
32 }
33