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diff --git a/clang-r353983/include/clang/AST/CommentBriefParser.h b/clang-r353983/include/clang/AST/CommentBriefParser.h
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+//===--- CommentBriefParser.h - Dumb comment parser -------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines a very simple Doxygen comment parser.
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LLVM_CLANG_AST_COMMENTBRIEFPARSER_H
+#define LLVM_CLANG_AST_COMMENTBRIEFPARSER_H
+
+#include "clang/AST/CommentLexer.h"
+
+namespace clang {
+namespace comments {
+
+/// A very simple comment parser that extracts "a brief description".
+///
+/// Due to a variety of comment styles, it considers the following as "a brief
+/// description", in order of priority:
+/// \li a \or \\short command,
+/// \li the first paragraph,
+/// \li a \\result or \\return or \\returns paragraph.
+class BriefParser {
+  Lexer &L;
+
+  const CommandTraits &Traits;
+
+  /// Current lookahead token.
+  Token Tok;
+
+  SourceLocation ConsumeToken() {
+    SourceLocation Loc = Tok.getLocation();
+    L.lex(Tok);
+    return Loc;
+  }
+
+public:
+  BriefParser(Lexer &L, const CommandTraits &Traits);
+
+  /// Return the best "brief description" we can find.
+  std::string Parse();
+};
+
+} // end namespace comments
+} // end namespace clang
+
+#endif
+