libcxx/test/std/time/time.duration/time.duration.arithmetic/op_-=.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
   9 // <chrono>
  10
  11 // duration
  12
  13 // duration& operator-=(const duration& d);
  14
  15 #include <chrono>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 #if TEST_STD_VER > 14
  21 constexpr bool test_constexpr()
  22 {
  23     std::chrono::seconds s(3);
  24     s -= std::chrono::seconds(2);
  25     if (s.count() != 1) return false;
  26     s -= std::chrono::minutes(2);
  27     return s.count() == -119;
  28 }
  29 #endif
  30
  31 int main(int, char**)
  32 {
  33     {
  34     std::chrono::seconds s(3);
  35     s -= std::chrono::seconds(2);
  36     assert(s.count() == 1);
  37     s -= std::chrono::minutes(2);
  38     assert(s.count() == -119);
  39     }
  40
  41 #if TEST_STD_VER > 14
  42     static_assert(test_constexpr(), "");
  43 #endif
  44
  45   return 0;
  46 }