text: // The MIT License (MIT)
  //
  // Copyright (c) 2015, 2016 Howard Hinnant
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  
  // class month_day_last
  // {
  // public:
  //     constexpr explicit month_day_last(const date::month& m) noexcept;
  //
  //     constexpr date::month month() const noexcept;
  //     constexpr bool ok() const noexcept;
  // };
  
  // constexpr bool operator==(const month_day_last& x, const month_day_last& y) noexcept;
  // constexpr bool operator!=(const month_day_last& x, const month_day_last& y) noexcept;
  // constexpr bool operator< (const month_day_last& x, const month_day_last& y) noexcept;
  // constexpr bool operator> (const month_day_last& x, const month_day_last& y) noexcept;
  // constexpr bool operator<=(const month_day_last& x, const month_day_last& y) noexcept;
  // constexpr bool operator>=(const month_day_last& x, const month_day_last& y) noexcept;
  
  // std::ostream& operator<<(std::ostream& os, const month_day_last& mdl);
  
  #include "date.h"
  
  #include <cassert>
  #include <sstream>
  #include <type_traits>
  
  static_assert( std::is_trivially_destructible<date::month_day_last>{}, "");
  static_assert(!std::is_default_constructible<date::month_day_last>{}, "");
  static_assert( std::is_trivially_copy_constructible<date::month_day_last>{}, "");
  static_assert( std::is_trivially_copy_assignable<date::month_day_last>{}, "");
  static_assert( std::is_trivially_move_constructible<date::month_day_last>{}, "");
  static_assert( std::is_trivially_move_assignable<date::month_day_last>{}, "");
  
  static_assert(std::is_nothrow_constructible<date::month_day_last, date::month>{}, "");
  static_assert(!std::is_convertible<date::month, date::month_day_last>{}, "");
  
  int
  main()
  {
      using namespace date;
  
      constexpr month_day_last mdl1{feb};
      constexpr month_day_last mdl2{mar};
      static_assert(mdl1.ok(), "");
      static_assert(mdl2.ok(), "");
      static_assert(!month_day_last{month{0}}.ok(), "");
      static_assert(mdl1.month() == feb, "");
      static_assert(mdl2.month() == mar, "");
      static_assert(mdl1 == mdl1, "");
      static_assert(mdl1 != mdl2, "");
      static_assert(mdl1 < mdl2, "");
      std::ostringstream os;
      os << mdl1;
      assert(os.str() == "Feb/last");
  }
  