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//===----------------------------------------------------------------------===//
//
// 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++03, c++11, c++14, c++17
// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
// XFAIL: libcpp-has-no-experimental-tzdb
// XFAIL: availability-tzdb-missing
// <chrono>
//
// class utc_clock;
// static time_point now();
#include <chrono>
#include <concepts>
#include <cassert>
int main(int, const char**) {
using clock = std::chrono::utc_clock;
std::same_as<clock::time_point> decltype(auto) t = clock::now();
assert(t >= clock::time_point::min());
assert(t <= clock::time_point::max());
auto t2 = clock::now();
assert(t2 - t >= std::chrono::seconds(0));
// This may fail if the tests takes a long time to complete.
assert(t2 - t < std::chrono::seconds(42));
return 0;
}
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