libcxx/test/std/time/time.cal/time.cal.ymdlast/time.cal.ymdlast.members/plus_minus_equal_year.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 year_month_day_last& operator+=(const years& d) noexcept;
  14 // constexpr year_month_day_last& operator-=(const years& d) noexcept;
  15
  16 #include <chrono>
  17 #include <cassert>
  18 #include <type_traits>
  19 #include <utility>
  20
  21 #include "test_macros.h"
  22
  23 using year                = std::chrono::year;
  24 using month               = std::chrono::month;
  25 using month_day_last      = std::chrono::month_day_last;
  26 using year_month_day_last = std::chrono::year_month_day_last;
  27 using years               = std::chrono::years;
  28
  29 constexpr bool test() {
  30   for (int i = 1000; i <= 1010; ++i) {
  31     month_day_last mdl{month{2}};
  32     year_month_day_last ymdl(year{i}, mdl);
  33     assert(static_cast<int>((ymdl += years{2}).year()) == i + 2);
  34     assert(ymdl.month_day_last() == mdl);
  35     assert(static_cast<int>((ymdl).year()) == i + 2);
  36     assert(ymdl.month_day_last() == mdl);
  37     assert(static_cast<int>((ymdl -= years{1}).year()) == i + 1);
  38     assert(ymdl.month_day_last() == mdl);
  39     assert(static_cast<int>((ymdl).year()) == i + 1);
  40     assert(ymdl.month_day_last() == mdl);
  41   }
  42
  43   return true;
  44 }
  45
  46 int main(int, char**) {
  47   ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() += std::declval<years>());
  48   ASSERT_NOEXCEPT(std::declval<year_month_day_last&>() -= std::declval<years>());
  49
  50   ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() += std::declval<years>()));
  51   ASSERT_SAME_TYPE(year_month_day_last&, decltype(std::declval<year_month_day_last&>() -= std::declval<years>()));
  52
  53   test();
  54   static_assert(test());
  55
  56   return 0;
  57 }