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 once_flag;
13
14 // once_flag(const once_flag&) = delete;
15
16 #include <mutex>
17
main()18 int main()
19 {
20 std::once_flag f;
21 std::once_flag f2(f);
22 }
23