Strict mode detection in preparser.

include/v8-preparser.h

 // Copyright 2011 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 48 matching lines @@
 #define V8EXPORT __attribute__ ((visibility("default")))
 #else  // defined(__GNUC__) && (__GNUC__ >= 4)
 #define V8EXPORT
 #endif  // defined(__GNUC__) && (__GNUC__ >= 4)
 
 #endif  // _WIN32
 
 
 namespace v8 {
 
-
+// The result of preparsing is either a stack overflow error, or an opaque
+// blob of data that can be passed back into the parser.
 class V8EXPORT PreParserData {
  public:
   PreParserData(size_t size, const uint8_t* data)
       : data_(data), size_(size) { }
 
   // Create a PreParserData value where stack_overflow reports true.
   static PreParserData StackOverflow() { return PreParserData(0, NULL); }
 
   // Whether the pre-parser stopped due to a stack overflow.
   // If this is the case, size() and data() should not be used.
@@ skipping 27 matching lines @@
 // space that the preparser is allowed to use. If the preparser uses
 // more stack space than the limit provided, the result's stack_overflow()
 // method will return true. Otherwise the result contains preparser
 // data that can be used by the V8 parser to speed up parsing.
 PreParserData V8EXPORT Preparse(UnicodeInputStream* input,
                                 size_t max_stack_size);
 
 }  // namespace v8.
 
 #endif  // PREPARSER_H