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// <mutex>
11
12// struct defer_lock_t {};
13// struct try_to_lock_t {};
14// struct adopt_lock_t {};
15//
16// constexpr defer_lock_t  defer_lock{};
17// constexpr try_to_lock_t try_to_lock{};
18// constexpr adopt_lock_t  adopt_lock{};
19
20#include <mutex>
21#include <type_traits>
22
23int main()
24{
25    typedef std::defer_lock_t T1;
26    typedef std::try_to_lock_t T2;
27    typedef std::adopt_lock_t T3;
28
29    T1 t1 = std::defer_lock;
30    T2 t2 = std::try_to_lock;
31    T3 t3 = std::adopt_lock;
32}
33