1 files changed, 35 insertions, 0 deletions
diff --git a/libcxx/modules/std/syncstream.cppm b/libcxx/modules/std/syncstream.cppm
new file mode 100644
index 000000000000..310f279d58bf
--- /dev/null
+++ b/libcxx/modules/std/syncstream.cppm
@@ -0,0 +1,35 @@
+// -*- 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
+//
+//===----------------------------------------------------------------------===//
+
+module;
+#if __has_include(<syncstream>)
+#  error "include this header unconditionally and uncomment the exported symbols"
+#  include <syncstream>
+#endif
+
+export module std:syncstream;
+export namespace std {
+#if 0
+  using std::basic_syncbuf;
+
+  // [syncstream.syncbuf.special], specialized algorithms
+  using std::swap;
+
+  using std::syncbuf;
+#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+  using std::wsyncbuf;
+#  endif
+  using std::basic_osyncstream;
+
+  using std::osyncstream;
+#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+  using std::wosyncstream;
+#  endif
+#endif
+} // namespace std