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++(); // 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 h(3); 24 return (++h).count() == 4; 25 } 26 #endif 27 main(int,char **)28int main(int, char**) 29 { 30 { 31 std::chrono::hours h(3); 32 std::chrono::hours& href = ++h; 33 assert(&href == &h); 34 assert(h.count() == 4); 35 } 36 37 #if TEST_STD_VER > 14 38 static_assert(test_constexpr(), ""); 39 #endif 40 41 return 0; 42 } 43