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& operator=(const once_flag&) = delete; 15 16#include <mutex> 17 18int main() 19{ 20 std::once_flag f; 21 std::once_flag f2; 22 f2 = f; 23} 24