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

[Louis Dionne via libcxx-commits]

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@@ -0,0 +1,37 @@
+//===----------------------------------------------------------------------===//
+//
+// 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>
+
+// struct leap_second_info {
+//   bool    is_leap_second;
+//   seconds elapsed;
+// };
+
+#include <chrono>
+#include <type_traits>
+
+// Validates whether:
+// - The members are present as non-const members.
+// - The struct is an aggregate.
+int main(int, const char**) {
+  static_assert(std::is_aggregate_v<std::chrono::leap_second_info>);
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ldionne wrote:

Let's also test this inside `constexpr`. If we had a non-constexpr user-defined destructor, I think the test would currently pass but I would argue that it shouldn't.

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