//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // <chrono> // duration // duration operator-() const; #include <chrono> #include <cassert> int main() { const std::chrono::minutes m(3); std::chrono::minutes m2 = -m; assert(m2.count() == -m.count()); }