libcxx/test/std/time/time.cal/time.cal.ymdlast/time.cal.ymdlast.members/ok.pass.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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 // UNSUPPORTED: c++03, c++11, c++14, c++17
   9
  10 // <chrono>
  11 // class year_month_day_last;
  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
  23 int main(int, char**)
  24 {
  25     using year                = std::chrono::year;
  26     using month               = std::chrono::month;
  27     using month_day_last      = std::chrono::month_day_last;
  28     using year_month_day_last = std::chrono::year_month_day_last;
  29
  30     constexpr month January = std::chrono::January;
  31
  32     ASSERT_NOEXCEPT(                std::declval<const year_month_day_last>().ok());
  33     ASSERT_SAME_TYPE(bool, decltype(std::declval<const year_month_day_last>().ok()));
  34
  35     static_assert(!year_month_day_last{year{-32768}, month_day_last{month{}}}.ok(), ""); // both bad
  36     static_assert(!year_month_day_last{year{-32768}, month_day_last{January}}.ok(), ""); // Bad year
  37     static_assert(!year_month_day_last{year{2019},   month_day_last{month{}}}.ok(), ""); // Bad month
  38     static_assert( year_month_day_last{year{2019},   month_day_last{January}}.ok(), ""); // All OK
  39
  40     for (unsigned i = 0; i <= 50; ++i)
  41     {
  42         year_month_day_last ym{year{2019}, month_day_last{month{i}}};
  43         assert( ym.ok() == month{i}.ok());
  44     }
  45
  46     const int ymax = static_cast<int>(year::max());
  47     for (int i = ymax - 100; i <= ymax + 100; ++i)
  48     {
  49         year_month_day_last ym{year{i}, month_day_last{January}};
  50         assert( ym.ok() == year{i}.ok());
  51     }
  52
  53   return 0;
  54 }