libcxx/test/std/time/time.duration/time.duration.nonmember/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 // template <class Rep1, class Period1, class Rep2, class Period2>
  14 //   constexpr
  15 //   typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type
  16 //   operator-(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
  17
  18 #include <chrono>
  19 #include <cassert>
  20 #include <ratio>
  21
  22 #include "test_macros.h"
  23
  24 int main(int, char**)
  25 {
  26     {
  27     std::chrono::seconds s1(3);
  28     std::chrono::seconds s2(5);
  29     std::chrono::seconds r = s1 - s2;
  30     assert(r.count() == -2);
  31     }
  32     {
  33     std::chrono::seconds s1(3);
  34     std::chrono::microseconds s2(5);
  35     std::chrono::microseconds r = s1 - s2;
  36     assert(r.count() == 2999995);
  37     }
  38     {
  39     std::chrono::duration<int, std::ratio<2, 3> > s1(3);
  40     std::chrono::duration<int, std::ratio<3, 5> > s2(5);
  41     std::chrono::duration<int, std::ratio<1, 15> > r = s1 - s2;
  42     assert(r.count() == -15);
  43     }
  44     {
  45     std::chrono::duration<int, std::ratio<2, 3> > s1(3);
  46     std::chrono::duration<double, std::ratio<3, 5> > s2(5);
  47     std::chrono::duration<double, std::ratio<1, 15> > r = s1 - s2;
  48     assert(r.count() == -15);
  49     }
  50 #if TEST_STD_VER >= 11
  51     {
  52     constexpr std::chrono::seconds s1(3);
  53     constexpr std::chrono::seconds s2(5);
  54     constexpr std::chrono::seconds r = s1 - s2;
  55     static_assert(r.count() == -2, "");
  56     }
  57     {
  58     constexpr std::chrono::seconds s1(3);
  59     constexpr std::chrono::microseconds s2(5);
  60     constexpr std::chrono::microseconds r = s1 - s2;
  61     static_assert(r.count() == 2999995, "");
  62     }
  63     {
  64     constexpr std::chrono::duration<int, std::ratio<2, 3> > s1(3);
  65     constexpr std::chrono::duration<int, std::ratio<3, 5> > s2(5);
  66     constexpr std::chrono::duration<int, std::ratio<1, 15> > r = s1 - s2;
  67     static_assert(r.count() == -15, "");
  68     }
  69     {
  70     constexpr std::chrono::duration<int, std::ratio<2, 3> > s1(3);
  71     constexpr std::chrono::duration<double, std::ratio<3, 5> > s2(5);
  72     constexpr std::chrono::duration<double, std::ratio<1, 15> > r = s1 - s2;
  73     static_assert(r.count() == -15, "");
  74     }
  75 #endif
  76
  77   return 0;
  78 }