Experimental: merge from bleeding edge 1298:1307. Port the eval...

src/jsregexp.h

 // Copyright 2006-2008 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 806 matching lines @@
   virtual int GreedyLoopTextLength();
   virtual TextNode* Clone() {
     TextNode* result = new TextNode(*this);
     result->CalculateOffsets();
     return result;
   }
   void CalculateOffsets();
 
  private:
   enum TextEmitPassType {
-    NON_ASCII_MATCH,
-    CHARACTER_MATCH,
-    CASE_CHARACTER_MATCH,
-    CHARACTER_CLASS_MATCH
+    NON_ASCII_MATCH,             // Check for characters that can't match.
+    SIMPLE_CHARACTER_MATCH,      // Case-dependent single character check.
+    NON_LETTER_CHARACTER_MATCH,  // Check characters that have no case equivs.
+    CASE_CHARACTER_MATCH,        // Case-independent single character check.
+    CHARACTER_CLASS_MATCH        // Character class.
   };
+  static bool SkipPass(int pass, bool ignore_case);
+  static const int kFirstRealPass = SIMPLE_CHARACTER_MATCH;
+  static const int kLastPass = CHARACTER_CLASS_MATCH;
   void TextEmitPass(RegExpCompiler* compiler,
                     TextEmitPassType pass,
                     bool preloaded,
                     Trace* trace,
                     bool first_element_checked,
                     int* checked_up_to);
   int Length();
   ZoneList<TextElement>* elms_;
 };
 
@@ skipping 513 matching lines @@
                                     Handle<String> pattern,
                                     bool is_ascii);
 
   static void DotPrint(const char* label, RegExpNode* node, bool ignore_case);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSREGEXP_H_