diff --git a/Driver/RewriteTest.cpp b/Driver/RewriteTest.cpp
new file mode 100644
index 0000000..446ae1a
--- /dev/null
+++ b/Driver/RewriteTest.cpp
@@ -0,0 +1,41 @@
+//===--- RewriteTest.cpp - Rewriter playground ----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a testbed.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Rewrite/TokenRewriter.h"
+#include "clang.h"
+#include "clang/Lex/Preprocessor.h"
+#include <iostream>
+
+void clang::DoRewriteTest(Preprocessor &PP, const std::string &InFileName,
+                          const std::string &OutFileName) {
+  SourceManager &SM = PP.getSourceManager();
+  const LangOptions &LangOpts = PP.getLangOptions();
+
+  std::pair<const char*,const char*> File =SM.getBufferData(SM.getMainFileID());
+  
+  // Create a lexer to lex all the tokens of the main file in raw mode.  Even
+  // though it is in raw mode, it will not return comments.
+  Lexer RawLex(SourceLocation::getFileLoc(SM.getMainFileID(), 0),
+               LangOpts, File.first, File.second);
+  
+  RawLex.SetKeepWhitespaceMode(true);
+  
+  Token RawTok;
+  RawLex.LexFromRawLexer(RawTok);
+  while (RawTok.isNot(tok::eof)) {
+    std::cout << PP.getSpelling(RawTok);
+    RawLex.LexFromRawLexer(RawTok);
+  }
+  
+  
+}
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