text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  // UNSUPPORTED: c++03, c++11, c++14, c++17
  
  // <chrono>
  // class year;
  
  //  constexpr year& operator++() noexcept;
  //  constexpr year operator++(int) noexcept;
  
  
  #include <chrono>
  #include <type_traits>
  #include <cassert>
  
  #include "test_macros.h"
  
  template <typename Y>
  constexpr bool testConstexpr()
  {
      Y y1{10};
      if (static_cast<int>(++y1) != 11) return false;
      if (static_cast<int>(y1++) != 11) return false;
      if (static_cast<int>(y1)   != 12) return false;
      return true;
  }
  
  int main(int, char**)
  {
      using year = std::chrono::year;
      ASSERT_NOEXCEPT(++(std::declval<year&>())  );
      ASSERT_NOEXCEPT(  (std::declval<year&>())++);
  
      ASSERT_SAME_TYPE(year , decltype(  std::declval<year&>()++));
      ASSERT_SAME_TYPE(year&, decltype(++std::declval<year&>()  ));
  
      static_assert(testConstexpr<year>(), "");
  
      for (int i = 11000; i <= 11020; ++i)
      {
          year year(i);
          assert(static_cast<int>(++year) == i + 1);
          assert(static_cast<int>(year++) == i + 1);
          assert(static_cast<int>(year)   == i + 2);
      }
  
    return 0;
  }
  