libcxx/test/std/time/time.hms/time.hms.members/is_negative.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 bool is_negative() const noexcept;
  15
  16 #include <chrono>
  17 #include <cassert>
  18 #include <ratio>
  19 #include <utility>
  20
  21 #include "test_macros.h"
  22
  23 template <typename Duration>
  24 constexpr bool check_neg(Duration d)
  25 {
  26     ASSERT_SAME_TYPE(bool, decltype(std::declval<std::chrono::hh_mm_ss<Duration>>().is_negative()));
  27     ASSERT_NOEXCEPT(                std::declval<std::chrono::hh_mm_ss<Duration>>().is_negative());
  28     return std::chrono::hh_mm_ss<Duration>(d).is_negative();
  29 }
  30
  31 int main(int, char**)
  32 {
  33     using microfortnights = std::chrono::duration<int, std::ratio<756, 625>>;
  34
  35     static_assert(!check_neg(std::chrono::minutes( 1)), "");
  36     static_assert( check_neg(std::chrono::minutes(-1)), "");
  37
  38     assert(!check_neg(std::chrono::seconds( 5000)));
  39     assert( check_neg(std::chrono::seconds(-5000)));
  40     assert(!check_neg(std::chrono::minutes( 5000)));
  41     assert( check_neg(std::chrono::minutes(-5000)));
  42     assert(!check_neg(std::chrono::hours( 11)));
  43     assert( check_neg(std::chrono::hours(-11)));
  44
  45     assert(!check_neg(std::chrono::milliseconds( 123456789LL)));
  46     assert( check_neg(std::chrono::milliseconds(-123456789LL)));
  47     assert(!check_neg(std::chrono::microseconds( 123456789LL)));
  48     assert( check_neg(std::chrono::microseconds(-123456789LL)));
  49     assert(!check_neg(std::chrono::nanoseconds( 123456789LL)));
  50     assert( check_neg(std::chrono::nanoseconds(-123456789LL)));
  51
  52     assert(!check_neg(microfortnights( 10000)));
  53     assert( check_neg(microfortnights(-10000)));
  54
  55     return 0;
  56 }