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;
12
13// constexpr bool ok() const noexcept;
14// Returns: m_.ok() && y_.ok().
15
16#include <chrono>
17#include <cassert>
18#include <type_traits>
19#include <utility>
20
21#include "test_macros.h"
22
23int main(int, char**)
24{
25 using month = std::chrono::month;
26 using year = std::chrono::year;
27 using year_month = std::chrono::year_month;
28
29 constexpr month January = std::chrono::January;
30
31 ASSERT_NOEXCEPT( std::declval<const year_month>().ok());
32 ASSERT_SAME_TYPE(bool, decltype(std::declval<const year_month>().ok()));
33
34 static_assert(!year_month{year{-32768}, January}.ok(), ""); // Bad year
35 static_assert(!year_month{year{2019}, month{}}.ok(), ""); // Bad month
36 static_assert( year_month{year{2019}, January}.ok(), ""); // Both OK
37
38 for (unsigned i = 0; i <= 50; ++i)
39 {
40 year_month ym{year{2019}, month{i}};
41 assert( ym.ok() == month{i}.ok());
42 }
43
44 const int ymax = static_cast<int>(year::max());
45 for (int i = ymax - 100; i <= ymax + 100; ++i)
46 {
47 year_month ym{year{i}, January};
48 assert( ym.ok() == year{i}.ok());
49 }
50
51 return 0;
52}
53

source code of libcxx/test/std/time/time.cal/time.cal.ym/time.cal.ym.members/ok.pass.cpp