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// template <class Mutex> class lock_guard; 13 14// lock_guard(lock_guard const&) = delete; 15 16#include <mutex> 17 18int main() 19{ 20 std::mutex m; 21 std::lock_guard<std::mutex> lg0(m); 22 std::lock_guard<std::mutex> lg(lg0); 23} 24