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
21constexpr bool test_constexpr()
22{
23 std::chrono::hours h(3);
24 return (--h).count() == 2;
25}
26#endif
27
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() == 2);
35 }
36
37#if TEST_STD_VER > 14
38 static_assert(test_constexpr(), "");
39#endif
40
41 return 0;
42}
43

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