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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <chrono> 10 11 // duration 12 13 // constexpr duration operator--(int); // constexpr in C++17 14 15 #include <chrono> 16 #include <cassert> 17 18 #include "test_macros.h" 19 20 #if TEST_STD_VER > 14 test_constexpr()21constexpr bool test_constexpr() 22 { 23 std::chrono::hours h1(3); 24 std::chrono::hours h2 = h1--; 25 return h1.count() == 2 && h2.count() == 3; 26 } 27 #endif 28 29 main(int,char **)30int main(int, char**) 31 { 32 { 33 std::chrono::hours h1(3); 34 std::chrono::hours h2 = h1--; 35 assert(h1.count() == 2); 36 assert(h2.count() == 3); 37 } 38 39 #if TEST_STD_VER > 14 40 static_assert(test_constexpr(), ""); 41 #endif 42 43 return 0; 44 } 45