libcxx/test/std/time/time.cal/time.cal.year/time.cal.year.nonmembers/plus.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;
  12
  13 // constexpr year operator+(const year& x, const years& y) noexcept;
  14 //   Returns: year(int{x} + y.count()).
  15 //
  16 // constexpr year operator+(const years& x, const year& y) noexcept;
  17 //   Returns: y + x
  18
  19 #include <chrono>
  20 #include <type_traits>
  21 #include <cassert>
  22
  23 #include "test_macros.h"
  24
  25 using year  = std::chrono::year;
  26 using years = std::chrono::years;
  27
  28 constexpr bool test() {
  29   year y{1223};
  30   for (int i = 1100; i <= 1110; ++i) {
  31     year y1 = y + years{i};
  32     year y2 = years{i} + y;
  33     assert(y1 == y2);
  34     assert(static_cast<int>(y1) == i + 1223);
  35     assert(static_cast<int>(y2) == i + 1223);
  36   }
  37
  38   return true;
  39 }
  40
  41 int main(int, char**) {
  42   ASSERT_NOEXCEPT(std::declval<year>() + std::declval<years>());
  43   ASSERT_SAME_TYPE(year, decltype(std::declval<year>() + std::declval<years>()));
  44
  45   ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year>());
  46   ASSERT_SAME_TYPE(year, decltype(std::declval<years>() + std::declval<year>()));
  47
  48   test();
  49   static_assert(test());
  50
  51   return 0;
  52 }