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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
     10 
     11 // <chrono>
     12 // class month_weekday_last;
     13 
     14 // constexpr chrono::month month() const noexcept;
     15 //  Returns: m_
     16 
     17 #include <chrono>
     18 #include <type_traits>
     19 #include <cassert>
     20 
     21 #include "test_macros.h"
     22 
     23 int main()
     24 {
     25     using month              = std::chrono::month;
     26     using weekday            = std::chrono::weekday;
     27     using weekday_last       = std::chrono::weekday_last;
     28     using month_weekday_last = std::chrono::month_weekday_last;
     29 
     30     constexpr weekday Tuesday = std::chrono::Tuesday;
     31 
     32     ASSERT_NOEXCEPT(                 std::declval<const month_weekday_last>().month());
     33     ASSERT_SAME_TYPE(month, decltype(std::declval<const month_weekday_last>().month()));
     34 
     35     static_assert( month_weekday_last{month{}, weekday_last{Tuesday}}.month() == month{}, "");
     36 
     37     for (unsigned i = 1; i <= 50; ++i)
     38     {
     39         month_weekday_last mdl(month{i}, weekday_last{Tuesday});
     40         assert( static_cast<unsigned>(mdl.month()) == i);
     41     }
     42 }
     43