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;
12
13// constexpr year_month_day& operator+=(const years& d) noexcept;
14// constexpr year_month_day& 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 day = std::chrono::day;
26using year_month_day = std::chrono::year_month_day;
27using years = std::chrono::years;
28
29constexpr bool test() {
30 for (int i = 1000; i <= 1010; ++i) {
31 month m{2};
32 day d{23};
33 year_month_day ym(year{i}, m, d);
34 assert(static_cast<int>((ym += years{2}).year()) == i + 2);
35 assert(ym.month() == m);
36 assert(ym.day() == d);
37 assert(static_cast<int>((ym).year()) == i + 2);
38 assert(ym.month() == m);
39 assert(ym.day() == d);
40 assert(static_cast<int>((ym -= years{1}).year()) == i + 1);
41 assert(ym.month() == m);
42 assert(ym.day() == d);
43 assert(static_cast<int>((ym).year()) == i + 1);
44 assert(ym.month() == m);
45 assert(ym.day() == d);
46 }
47
48 return true;
49}
50
51int main(int, char**) {
52 ASSERT_NOEXCEPT(std::declval<year_month_day&>() += std::declval<years>());
53 ASSERT_NOEXCEPT(std::declval<year_month_day&>() -= std::declval<years>());
54
55 ASSERT_SAME_TYPE(year_month_day&, decltype(std::declval<year_month_day&>() += std::declval<years>()));
56 ASSERT_SAME_TYPE(year_month_day&, decltype(std::declval<year_month_day&>() -= std::declval<years>()));
57
58 test();
59 static_assert(test());
60
61 return 0;
62}
63

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