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 // <chrono> 11 12 // duration 13 14 // duration operator-() const; 15 16 #include <chrono> 17 #include <cassert> 18 main()19 int main() 20 { 21 { 22 const std::chrono::minutes m(3); 23 std::chrono::minutes m2 = -m; 24 assert(m2.count() == -m.count()); 25 } 26 #ifndef _LIBCPP_HAS_NO_CONSTEXPR 27 { 28 constexpr std::chrono::minutes m(3); 29 constexpr std::chrono::minutes m2 = -m; 30 static_assert(m2.count() == -m.count(), ""); 31 } 32 #endif 33 } 34