More precise break points and stepping when debugging...

src/ast.h

 // 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 1451 matching lines @@
   Token::Value op_;
   Expression* left_;
   Expression* right_;
 };
 
 
 class Conditional: public Expression {
  public:
   Conditional(Expression* condition,
               Expression* then_expression,
-              Expression* else_expression)
+              Expression* else_expression,
+              int then_expression_position,
+              int else_expression_position)
       : condition_(condition),
         then_expression_(then_expression),
-        else_expression_(else_expression) { }
+        else_expression_(else_expression),
+        then_expression_position_(then_expression_position),
+        else_expression_position_(else_expression_position) { }
 
   virtual void Accept(AstVisitor* v);
 
   virtual bool IsPrimitive();
 
   Expression* condition() const { return condition_; }
   Expression* then_expression() const { return then_expression_; }
   Expression* else_expression() const { return else_expression_; }
 
+  int then_expression_position() { return then_expression_position_; }
+  int else_expression_position() { return else_expression_position_; }
+
  private:
   Expression* condition_;
   Expression* then_expression_;
   Expression* else_expression_;
+  int then_expression_position_;
+  int else_expression_position_;
 };
 
 
 class Assignment: public Expression {
  public:
   Assignment(Token::Value op, Expression* target, Expression* value, int pos)
       : op_(op), target_(target), value_(value), pos_(pos),
         block_start_(false), block_end_(false) {
     ASSERT(Token::IsAssignmentOp(op));
   }
@@ skipping 589 matching lines @@
 
   // Holds the result of copying an expression.
   Expression* expr_;
   // Holds the result of copying a statement.
   Statement* stmt_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_