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+=(const years& d) noexcept;
14// constexpr year& 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 years = std::chrono::years;
25
26constexpr bool test() {
27 for (int i = 10000; i <= 10020; ++i) {
28 year yr(i);
29 assert(static_cast<int>(yr += years{10}) == i + 10);
30 assert(static_cast<int>(yr) == i + 10);
31 assert(static_cast<int>(yr -= years{9}) == i + 1);
32 assert(static_cast<int>(yr) == i + 1);
33 }
34
35 return true;
36}
37
38int main(int, char**) {
39 ASSERT_NOEXCEPT(std::declval<year&>() += std::declval<years>());
40 ASSERT_NOEXCEPT(std::declval<year&>() -= std::declval<years>());
41
42 ASSERT_SAME_TYPE(year&, decltype(std::declval<year&>() += std::declval<years>()));
43 ASSERT_SAME_TYPE(year&, decltype(std::declval<year&>() -= std::declval<years>()));
44
45 test();
46 static_assert(test());
47
48 return 0;
49}
50

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