libcxx/test/std/time/time.hms/time.hms.members/hours.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 // <chrono>
  10
  11 // template <class Duration>
  12 // class hh_mm_ss
  13 //
  14 // constexpr chrono::hours hours() const noexcept;
  15
  16 // Test values
  17 // duration     hours   minutes seconds fractional
  18 // 5000s            1       23      20      0
  19 // 5000 minutes     83      20      0       0
  20 // 123456789ms      34      17      36      789ms
  21 // 123456789us      0       2       3       456789us
  22 // 123456789ns      0       0       0       123456789ns
  23 // 1000mfn          0       20      9       0.6 (6000/10000)
  24 // 10000mfn         3       21      36      0
  25
  26
  27 #include <chrono>
  28 #include <cassert>
  29 #include <ratio>
  30 #include <utility>
  31
  32 #include "test_macros.h"
  33
  34 template <typename Duration>
  35 constexpr long check_hours(Duration d)
  36 {
  37     using HMS = std::chrono::hh_mm_ss<Duration>;
  38     ASSERT_SAME_TYPE(std::chrono::hours, decltype(std::declval<HMS>().hours()));
  39     ASSERT_NOEXCEPT(                              std::declval<HMS>().hours());
  40     return HMS(d).hours().count();
  41 }
  42
  43 int main(int, char**)
  44 {
  45     using microfortnights = std::chrono::duration<int, std::ratio<756, 625>>;
  46
  47     static_assert( check_hours(std::chrono::minutes( 1)) == 0, "");
  48     static_assert( check_hours(std::chrono::minutes(-1)) == 0, "");
  49
  50     assert( check_hours(std::chrono::seconds( 5000)) == 1);
  51     assert( check_hours(std::chrono::seconds(-5000)) == 1);
  52     assert( check_hours(std::chrono::minutes( 5000)) == 83);
  53     assert( check_hours(std::chrono::minutes(-5000)) == 83);
  54     assert( check_hours(std::chrono::hours( 11))     == 11);
  55     assert( check_hours(std::chrono::hours(-11))     == 11);
  56
  57     assert( check_hours(std::chrono::milliseconds( 123456789LL)) == 34);
  58     assert( check_hours(std::chrono::milliseconds(-123456789LL)) == 34);
  59     assert( check_hours(std::chrono::microseconds( 123456789LL)) ==  0);
  60     assert( check_hours(std::chrono::microseconds(-123456789LL)) ==  0);
  61     assert( check_hours(std::chrono::nanoseconds( 123456789LL))  ==  0);
  62     assert( check_hours(std::chrono::nanoseconds(-123456789LL))  ==  0);
  63
  64     assert( check_hours(microfortnights(  1000)) == 0);
  65     assert( check_hours(microfortnights( -1000)) == 0);
  66     assert( check_hours(microfortnights( 10000)) == 3);
  67     assert( check_hours(microfortnights(-10000)) == 3);
  68
  69     return 0;
  70 }