[libcxx-commits] [libcxx] [libc++][chrono] implements UTC clock. (PR #90393)

[Louis Dionne via libcxx-commits]

================
@@ -0,0 +1,124 @@
+//===----------------------------------------------------------------------===//
+//
+// 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-incomplete-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+//
+// class utc_clock;
+
+// template<class Duration>
+// leap_second_info get_leap_second_info(const utc_time<Duration>& ut);
----------------
ldionne wrote:

```suggestion
// leap_second_info std::chrono::get_leap_second_info(const utc_time<Duration>& ut);
```

https://github.com/llvm/llvm-project/pull/90393