[mlir] [openmp] [lldb] [libc] [compiler-rt] [libcxx] [llvm] [lld] [clang-tools-extra] [flang] [clang] [libc++][streams] P1759R6: Native handles and file streams (PR #76632)

[Mark de Wever via llvm-commits]

================
@@ -0,0 +1,30 @@
+//===----------------------------------------------------------------------===//
+//
+// 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, c++20, c++23
+
+// REQUIRES: has-unix-headers
+// UNSUPPORTED: libcpp-hardening-mode=none
+// XFAIL: availability-verbose_abort-missing
+
+// <fstream>
+
+// class basic_filebuf;
+
+// native_handle_type native_handle() const noexcept;
+
+#include <fstream>
+
+#include "../native_handle_test_helpers.h"
+
+int main(int, char**) {
+  test_native_handle_assertion<std::basic_filebuf<char>>();
+#ifndef TEST_HAS_NO_WIDE_CHARACTERS
+  test_native_handle_assertion<std::basic_filebuf<wchar_t>>();
+#endif
----------------
mordante wrote:

```suggestion
#endif
  return 0;
```
The same for the other assert tests.

https://github.com/llvm/llvm-project/pull/76632