add a disclaimer

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57038 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Rewrite/Rewriter.h b/include/clang/Rewrite/Rewriter.h
index 9a579f12634d1d4df4c0f7c14212959d2c177bc3..59ed5d826b4187a7897d15ed13b484f7577de3d5 100644 (file)
--- a/include/clang/Rewrite/Rewriter.h
+++ b/include/clang/Rewrite/Rewriter.h
@@ -138,7 +138,10 @@ public:
   
   /// getRewritenText - Return the rewritten form of the text in the specified
   /// range.  If the start or end of the range was unrewritable or if they are
-  /// in different buffers, this returns an empty string. 
+  /// in different buffers, this returns an empty string.
+  ///
+  /// Note that this method is not particularly efficient.
+  ///
   std::string getRewritenText(SourceRange Range) const;
   
   /// InsertText - Insert the specified string at the specified location in the