[libcxx-commits] [libcxx] [libc++][chrono] Loads leap-seconds.list in tzdb. (PR #82113)

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@@ -0,0 +1,52 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP
+#define SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP
+
+// Contains helper functions to create a std::chrono::leap_second.
+//
+// Since the standard doesn't specify how a @ref std::chrono::leap_second is
+// constructed this is implementation defined. To make the public API tests of
+// the class generic this header defines helper functions to create the
+// required object.
+//
+// Note This requires every standard library implementation to write their own
+// helper function. Vendors are encouraged to create a pull request at
+// https://github.com/llvm/llvm-project so their specific implementation can be
+// part of this file.
+
+#include "test_macros.h"
+
+#if TEST_STD_VER < 20
+#  error "The format header requires at least C++20"
+#endif
+
+#include <chrono>
+
+#ifdef _LIBCPP_VERSION
+
+// In order to find this include the calling test needs to provide this path in
+// the search path. Typically this looks like:
+//   ADDITIONAL_COMPILE_FLAGS(stdlib=libc++): -I %S/../../../../../../src/include
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EricWF wrote:

Do we have an expansion that points to the source root?
If not, I can add one. That way we can get rid of these relative paths.


https://github.com/llvm/llvm-project/pull/82113