libcxx/test/std/time/time.cal/time.cal.mdlast/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 month_day_last;
  12
  13 // constexpr bool ok() const noexcept;
  14 //  Returns: m_.ok()
  15
  16 #include <chrono>
  17 #include <type_traits>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21
  22 int main(int, char**)
  23 {
  24     using month          = std::chrono::month;
  25     using month_day_last = std::chrono::month_day_last;
  26
  27     ASSERT_NOEXCEPT(                std::declval<const month_day_last>().ok());
  28     ASSERT_SAME_TYPE(bool, decltype(std::declval<const month_day_last>().ok()));
  29
  30     static_assert(!month_day_last{month{}}.ok(),          "");
  31     static_assert( month_day_last{std::chrono::May}.ok(), "");
  32
  33     for (unsigned i = 1; i <= 12; ++i)
  34     {
  35         month_day_last mdl{month{i}};
  36         assert( mdl.ok());
  37     }
  38
  39     //  If the month is not ok, all the days are bad
  40     for (unsigned i = 13; i <= 50; ++i)
  41     {
  42         month_day_last mdl{month{i}};
  43         assert(!mdl.ok());
  44     }
  45
  46   return 0;
  47 }