58 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <chrono>11// class month_day;12 13// constexpr bool ok() const noexcept;14// Returns: true if m_.ok() is true, 1d <= d_, and d_ is less than or equal to the15// number of days in month m_; otherwise returns false.16// When m_ == February, the number of days is considered to be 29.17 18#include <chrono>19#include <cassert>20#include <type_traits>21#include <utility>22 23#include "test_macros.h"24 25int main(int, char**)26{27 using day = std::chrono::day;28 using month = std::chrono::month;29 using month_day = std::chrono::month_day;30 31 ASSERT_NOEXCEPT( std::declval<const month_day>().ok());32 ASSERT_SAME_TYPE(bool, decltype(std::declval<const month_day>().ok()));33 34 static_assert(!month_day{}.ok(), "");35 static_assert( month_day{std::chrono::May, day{2}}.ok(), "");36 37 assert(!(month_day(std::chrono::April, day{0}).ok()));38 39 assert( (month_day{std::chrono::March, day{1}}.ok()));40 for (unsigned i = 1; i <= 12; ++i)41 {42 const bool is31 = i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12;43 assert(!(month_day{month{i}, day{ 0}}.ok()));44 assert( (month_day{month{i}, day{ 1}}.ok()));45 assert( (month_day{month{i}, day{10}}.ok()));46 assert( (month_day{month{i}, day{29}}.ok()));47 assert( (month_day{month{i}, day{30}}.ok()) == (i != 2));48 assert( (month_day{month{i}, day{31}}.ok()) == is31);49 assert(!(month_day{month{i}, day{32}}.ok()));50 }51 52 // If the month is not ok, all the days are bad53 for (unsigned i = 1; i <= 35; ++i)54 assert(!(month_day{month{13}, day{i}}.ok()));55 56 return 0;57}58