| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 |
| |
| // <chrono> |
| |
| // template<class Duration> |
| // using sys_time = time_point<system_clock, Duration>; |
| // using sys_seconds = sys_time<seconds>; |
| // using sys_days = sys_time<days>; |
| |
| // [Example: |
| // sys_seconds{sys_days{1970y/January/1}}.time_since_epoch() is 0s. |
| // sys_seconds{sys_days{2000y/January/1}}.time_since_epoch() is 946’684’800s, which is 10’957 * 86’400s. |
| // —end example] |
| |
| |
| #include <chrono> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| int main(int, char**) |
| { |
| using system_clock = std::chrono::system_clock; |
| using year = std::chrono::year; |
| |
| using seconds = std::chrono::seconds; |
| using minutes = std::chrono::minutes; |
| using days = std::chrono::days; |
| |
| using sys_seconds = std::chrono::sys_seconds; |
| using sys_minutes = std::chrono::sys_time<minutes>; |
| using sys_days = std::chrono::sys_days; |
| |
| constexpr std::chrono::month January = std::chrono::January; |
| |
| ASSERT_SAME_TYPE(std::chrono::sys_time<seconds>, sys_seconds); |
| ASSERT_SAME_TYPE(std::chrono::sys_time<days>, sys_days); |
| |
| // Test the long form, too |
| ASSERT_SAME_TYPE(std::chrono::time_point<system_clock, seconds>, sys_seconds); |
| ASSERT_SAME_TYPE(std::chrono::time_point<system_clock, minutes>, sys_minutes); |
| ASSERT_SAME_TYPE(std::chrono::time_point<system_clock, days>, sys_days); |
| |
| // Test some well known values |
| sys_days d0 = sys_days{year{1970}/January/1}; |
| sys_days d1 = sys_days{year{2000}/January/1}; |
| ASSERT_SAME_TYPE(decltype(d0.time_since_epoch()), days); |
| assert( d0.time_since_epoch().count() == 0); |
| assert( d1.time_since_epoch().count() == 10957); |
| |
| sys_seconds s0{d0}; |
| sys_seconds s1{d1}; |
| ASSERT_SAME_TYPE(decltype(s0.time_since_epoch()), seconds); |
| assert( s0.time_since_epoch().count() == 0); |
| assert( s1.time_since_epoch().count() == 946684800L); |
| |
| return 0; |
| } |