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 year& x, const years& y) noexcept;
14// Returns: year(int{x} + y.count()).
15//
16// constexpr year operator+(const years& x, const year& y) noexcept;
17// Returns: y + x
18
19#include <chrono>
20#include <cassert>
21#include <type_traits>
22#include <utility>
23
24#include "test_macros.h"
25
26using year = std::chrono::year;
27using years = std::chrono::years;
28
29constexpr bool test() {
30 year y{1223};
31 for (int i = 1100; i <= 1110; ++i) {
32 year y1 = y + years{i};
33 year y2 = years{i} + y;
34 assert(y1 == y2);
35 assert(static_cast<int>(y1) == i + 1223);
36 assert(static_cast<int>(y2) == i + 1223);
37 }
38
39 return true;
40}
41
42int main(int, char**) {
43 ASSERT_NOEXCEPT(std::declval<year>() + std::declval<years>());
44 ASSERT_SAME_TYPE(year, decltype(std::declval<year>() + std::declval<years>()));
45
46 ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year>());
47 ASSERT_SAME_TYPE(year, decltype(std::declval<years>() + std::declval<year>()));
48
49 test();
50 static_assert(test());
51
52 return 0;
53}
54

source code of libcxx/test/std/time/time.cal/time.cal.year/time.cal.year.nonmembers/plus.pass.cpp