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// UNSUPPORTED: c++03, c++11, c++14, c++17
9
10// <chrono>
11// class year;
12
13// constexpr year& operator--() noexcept;
14// constexpr year operator--(int) noexcept;
15
16#include <chrono>
17#include <cassert>
18#include <type_traits>
19#include <utility>
20
21#include "test_macros.h"
22
23using year = std::chrono::year;
24
25constexpr bool test() {
26 for (int i = 11000; i <= 11020; ++i) {
27 year yr(i);
28 assert(static_cast<int>(--yr) == i - 1);
29 assert(static_cast<int>(yr--) == i - 1);
30 assert(static_cast<int>(yr) == i - 2);
31 }
32
33 return true;
34}
35
36int main(int, char**) {
37 ASSERT_NOEXCEPT(--(std::declval<year&>()));
38 ASSERT_NOEXCEPT((std::declval<year&>())--);
39
40 ASSERT_SAME_TYPE(year, decltype(std::declval<year&>()--));
41 ASSERT_SAME_TYPE(year&, decltype(--std::declval<year&>()));
42
43 test();
44 static_assert(test());
45
46 return 0;
47}
48

source code of libcxx/test/std/time/time.cal/time.cal.year/time.cal.year.members/decrement.pass.cpp