63 lines · 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-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179// <chrono>10 11// template <class Duration>12// class hh_mm_ss13//14// constexpr precision subseconds() const noexcept;15//16// See the table in hours.pass.cpp for correspondence between the magic values used below17 18#include <chrono>19#include <cassert>20#include <cstdint>21#include <ratio>22#include <utility>23 24#include "test_macros.h"25 26template <typename Duration>27constexpr std::int64_t check_subseconds(Duration d)28{29 using HMS = std::chrono::hh_mm_ss<Duration>;30 ASSERT_SAME_TYPE(typename HMS::precision, decltype(std::declval<HMS>().subseconds()));31 ASSERT_NOEXCEPT( std::declval<HMS>().subseconds());32 return HMS(d).subseconds().count();33}34 35int main(int, char**)36{37 using microfortnights = std::chrono::duration<int, std::ratio<756, 625>>;38 39 static_assert( check_subseconds(std::chrono::seconds( 1)) == 0, "");40 static_assert( check_subseconds(std::chrono::seconds(-1)) == 0, "");41 42 assert( check_subseconds(std::chrono::seconds( 5000)) == 0);43 assert( check_subseconds(std::chrono::seconds(-5000)) == 0);44 assert( check_subseconds(std::chrono::minutes( 5000)) == 0);45 assert( check_subseconds(std::chrono::minutes(-5000)) == 0);46 assert( check_subseconds(std::chrono::hours( 11)) == 0);47 assert( check_subseconds(std::chrono::hours(-11)) == 0);48 49 assert( check_subseconds(std::chrono::milliseconds( 123456789LL)) == 789);50 assert( check_subseconds(std::chrono::milliseconds(-123456789LL)) == 789);51 assert( check_subseconds(std::chrono::microseconds( 123456789LL)) == 456789LL);52 assert( check_subseconds(std::chrono::microseconds(-123456789LL)) == 456789LL);53 assert( check_subseconds(std::chrono::nanoseconds( 123456789LL)) == 123456789LL);54 assert( check_subseconds(std::chrono::nanoseconds(-123456789LL)) == 123456789LL);55 56 assert( check_subseconds(microfortnights( 1000)) == 6000);57 assert( check_subseconds(microfortnights( -1000)) == 6000);58 assert( check_subseconds(microfortnights( 10000)) == 0);59 assert( check_subseconds(microfortnights(-10000)) == 0);60 61 return 0;62}63