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 // constexpr duration operator--(int); // constexpr in C++17 15 16 #include <chrono> 17 #include <cassert> 18 19 #include "test_macros.h" 20 21 #if TEST_STD_VER > 14 22 constexpr bool test_constexpr() 23 { 24 std::chrono::hours h1(3); 25 std::chrono::hours h2 = h1--; 26 return h1.count() == 2 && h2.count() == 3; 27 } 28 #endif 29 30 31 int main() 32 { 33 { 34 std::chrono::hours h1(3); 35 std::chrono::hours h2 = h1--; 36 assert(h1.count() == 2); 37 assert(h2.count() == 3); 38 } 39 40 #if TEST_STD_VER > 14 41 static_assert(test_constexpr(), ""); 42 #endif 43 } 44
