Change the handling of catch blocks to use context extension objects...

src/prettyprinter.cc

 // 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 267 matching lines @@
 void PrettyPrinter::VisitArrayLiteral(ArrayLiteral* node) {
   Print("[ ");
   for (int i = 0; i < node->values()->length(); i++) {
     if (i != 0) Print(",");
     Visit(node->values()->at(i));
   }
   Print(" ]");
 }
 
 
+void PrettyPrinter::VisitCatchExtensionObject(CatchExtensionObject* node) {
+  Print("{ ");
+  Visit(node->key());
+  Print(": ");
+  Visit(node->value());
+  Print(" }");
+}
+
+
 void PrettyPrinter::VisitSlot(Slot* node) {
   switch (node->type()) {
     case Slot::PARAMETER:
       Print("parameter[%d]", node->index());
       break;
     case Slot::LOCAL:
       Print("frame[%d]", node->index());
       break;
     case Slot::CONTEXT:
       Print(".context[%d]", node->index());
@@ skipping 650 matching lines @@
   IndentedScope indent("ARRAY LITERAL");
   if (node->values()->length() > 0) {
     IndentedScope indent("VALUES");
     for (int i = 0; i < node->values()->length(); i++) {
       Visit(node->values()->at(i));
     }
   }
 }
 
 
+void AstPrinter::VisitCatchExtensionObject(CatchExtensionObject* node) {
+  IndentedScope indent("CatchExtensionObject");
+  PrintIndentedVisit("KEY", node->key());
+  PrintIndentedVisit("VALUE", node->value());
+}
+
+
 void AstPrinter::VisitSlot(Slot* node) {
   PrintIndented("SLOT ");
   switch (node->type()) {
     case Slot::PARAMETER:
       Print("parameter[%d]", node->index());
       break;
     case Slot::LOCAL:
       Print("frame[%d]", node->index());
       break;
     case Slot::CONTEXT:
@@ skipping 108 matching lines @@
 
 void AstPrinter::VisitThisFunction(ThisFunction* node) {
   IndentedScope indent("THIS-FUNCTION");
 }
 
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal