69 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 9// UNSUPPORTED: c++03, c++11, c++14, c++1710// UNSUPPORTED: no-filesystem, no-localization, no-tzdb11 12// XFAIL: libcpp-has-no-experimental-tzdb13// XFAIL: availability-tzdb-missing14 15// <chrono>16 17// class time_zone;18 19// template <class _Duration>20// local_time<common_type_t<Duration, seconds>>21// to_local(const sys_time<Duration>& tp) const;22 23#include <chrono>24#include <format>25#include <cassert>26#include <string_view>27 28#include "test_macros.h"29#include "assert_macros.h"30#include "concat_macros.h"31 32int main(int, char**) {33 // To make sure the test does not depend on changes in the database it uses a34 // time zone with a fixed offset.35 using namespace std::literals::chrono_literals;36 37 const std::chrono::time_zone* tz = std::chrono::locate_zone("Etc/GMT+1");38 39 assert(tz->to_local(std::chrono::sys_time<std::chrono::nanoseconds>{-1ns}) ==40 std::chrono::local_time<std::chrono::nanoseconds>{-1ns - 1h});41 42 assert(tz->to_local(std::chrono::sys_time<std::chrono::microseconds>{0us}) ==43 std::chrono::local_time<std::chrono::microseconds>{0us - 1h});44 45 assert(tz->to_local(46 std::chrono::sys_time<std::chrono::seconds>{std::chrono::sys_days{std::chrono::January / 1 / -21970}}) ==47 std::chrono::local_time<std::chrono::seconds>{48 (std::chrono::sys_days{std::chrono::January / 1 / -21970}).time_since_epoch() - 1h});49 50 assert(51 tz->to_local(std::chrono::sys_time<std::chrono::days>{std::chrono::sys_days{std::chrono::January / 1 / 21970}}) ==52 std::chrono::local_time<std::chrono::seconds>{53 (std::chrono::sys_days{std::chrono::January / 1 / 21970}).time_since_epoch() - 1h});54 55 assert(tz->to_local(std::chrono::sys_time<std::chrono::weeks>{}) ==56 std::chrono::local_time<std::chrono::seconds>{57 (std::chrono::sys_days{std::chrono::January / 1 / 1970}).time_since_epoch() - 1h});58 59 assert(tz->to_local(std::chrono::sys_time<std::chrono::months>{}) ==60 std::chrono::local_time<std::chrono::seconds>{61 (std::chrono::sys_days{std::chrono::January / 1 / 1970}).time_since_epoch() - 1h});62 63 assert(tz->to_local(std::chrono::sys_time<std::chrono::years>{}) ==64 std::chrono::local_time<std::chrono::seconds>{65 (std::chrono::sys_days{std::chrono::January / 1 / 1970}).time_since_epoch() - 1h});66 67 return 0;68}69