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_month_day_last;
12
13// constexpr year_month_day_last& operator+=(const years& d) noexcept;
14// constexpr year_month_day_last& operator-=(const years& d) 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;
24using month = std::chrono::month;
25using month_day_last = std::chrono::month_day_last;
26using year_month_day_last = std::chrono::year_month_day_last;
27using years = std::chrono::years;
28
29constexpr bool test() {
30 for (int i = 1000; i <= 1010; ++i) {
31 month_day_last mdl{month{2}};
32 year_month_day_last ymdl(year{i}, mdl);
33 assert(static_cast<int>((ymdl += years{2}).year()) == i + 2);
34 assert(ymdl.month_day_last() == mdl);
35 assert(static_cast<int>((ymdl).year()) == i + 2);
36 assert(ymdl.month_day_last() == mdl);
37 assert(static_cast<int>((ymdl -= years{1}).year()) == i + 1);
38 assert(ymdl.month_day_last() == mdl);
39 assert(static_cast<int>((ymdl).year()) == i + 1);
40 assert(ymdl.month_day_last() == mdl);
41 }
42
43 return true;
44}
45
46int main(int, char**) {
47 ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() += std::declval<years>());
48 ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() -= std::declval<years>());
49
50 ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() += std::declval<years>()));
51 ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() -= std::declval<years>()));
52
53 test();
54 static_assert(test());
55
56 return 0;
57}
58

source code of libcxx/test/std/time/time.cal/time.cal.ymdlast/time.cal.ymdlast.members/plus_minus_equal_year.pass.cpp