[libcxx-commits] [libcxx] [libc++][ranges] implement `std::ranges::zip_transform_view` (PR #79605)

[Louis Dionne via libcxx-commits]

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@@ -0,0 +1,58 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 TEST_STD_RANGES_RANGE_ADAPTORS_RANGE_ZIP_TRANSFORM_TYPES_H
+#define TEST_STD_RANGES_RANGE_ADAPTORS_RANGE_ZIP_TRANSFORM_TYPES_H
+
+#include <functional>
+#include <ranges>
+
+#include "test_macros.h"
+#include "test_iterators.h"
+#include "test_range.h"
+#include "../types.h"
+
+#if TEST_STD_VER <= 20
+#  error "range.zip.transform/types.h" can only be included in builds supporting C++20
+#endif // TEST_STD_VER <= 20
----------------
ldionne wrote:

```suggestion
#endif
```

https://github.com/llvm/llvm-project/pull/79605