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 month;
12
13// constexpr month& operator++() noexcept;
14// constexpr month operator++(int) noexcept;
15
16#include <chrono>
17#include <cassert>
18#include <type_traits>
19#include <utility>
20
21#include "test_macros.h"
22
23constexpr bool test() {
24 using month = std::chrono::month;
25 for (unsigned i = 0; i <= 15; ++i) {
26 month m1(i);
27 month m2 = m1++;
28 assert(m1.ok());
29 assert(m1 != m2);
30
31 unsigned exp = i + 1;
32 while (exp > 12)
33 exp -= 12;
34 assert(static_cast<unsigned>(m1) == exp);
35 }
36 for (unsigned i = 0; i <= 15; ++i) {
37 month m1(i);
38 month m2 = ++m1;
39 assert(m1.ok());
40 assert(m2.ok());
41 assert(m1 == m2);
42
43 unsigned exp = i + 1;
44 while (exp > 12)
45 exp -= 12;
46 assert(static_cast<unsigned>(m1) == exp);
47 }
48
49 return true;
50}
51
52int main(int, char**) {
53 using month = std::chrono::month;
54
55 ASSERT_NOEXCEPT(++(std::declval<month&>()));
56 ASSERT_NOEXCEPT((std::declval<month&>())++);
57
58 ASSERT_SAME_TYPE(month, decltype(std::declval<month&>()++));
59 ASSERT_SAME_TYPE(month&, decltype(++std::declval<month&>()));
60
61 test();
62 static_assert(test());
63
64 return 0;
65}
66

source code of libcxx/test/std/time/time.cal/time.cal.month/time.cal.month.members/increment.pass.cpp