Preparser extracted into separate files that can be compiled to a library.

src/preparser.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 47 matching lines @@
   if (!*ok) return -1;  \
   ((void)0
 #define DUMMY )  // to make indentation work
 #undef DUMMY
 
 
 void PreParser::ReportUnexpectedToken(i::Token::Value token) {
   // We don't report stack overflows here, to avoid increasing the
   // stack depth even further.  Instead we report it after parsing is
   // over, in ParseProgram.
-  if (token == i::Token::ILLEGAL && scanner_->stack_overflow()) {
+  if (token == i::Token::ILLEGAL && stack_overflow_) {
     return;
   }
   i::JavaScriptScanner::Location source_location = scanner_->location();
 
   // Four of the tokens are treated specially
   switch (token) {
   case i::Token::EOS:
     return ReportMessageAt(source_location.beg_pos, source_location.end_pos,
                            "unexpected_eos", NULL);
   case i::Token::NUMBER:
@@ skipping 1096 matching lines @@
   if (scanner_->literal_length() == 3) {
     const char* token = scanner_->literal_string();
     *is_get = strncmp(token, "get", 3) == 0;
     *is_set = !*is_get && strncmp(token, "set", 3) == 0;
   }
   return GetIdentifierSymbol();
 }
 
 #undef CHECK_OK
 } }  // v8::preparser