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
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
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

source code of libcxx/test/std/time/time.duration/time.duration.arithmetic/op_--int.pass.cpp