27 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: no-threads10 11// <mutex>12 13// struct once_flag;14 15// once_flag& operator=(const once_flag&) = delete;16 17#include <mutex>18 19int main(int, char**)20{21 std::once_flag f;22 std::once_flag f2;23 f2 = f;24 25 return 0;26}27