public void visitForLoop(ForLoopNode forLoopNode)
        {
            IdentifierNode    identifier      = (IdentifierNode)forLoopNode.getChildren()[0];
            string            controlVariable = identifier.getVariableName();
            RangeOperatorNode rangeNode       = (RangeOperatorNode)forLoopNode.getChildren()[1];
            StatementListNode forStatements   = (StatementListNode)forLoopNode.getChildren()[2];

            rangeNode.getChildren()[0].accept(this);
            int begin = popInt();

            rangeNode.getChildren()[1].accept(this);
            int end = popInt();

            for (int i = begin; i <= end; i++)
            {
                this.symbolTable.updateVariable(controlVariable, i);
                foreach (INode child in forStatements.getChildren())
                {
                    child.accept(this);
                }
            }
        }
        public void visitForLoop(ForLoopNode node)
        {
            RangeOperatorNode rangeOperatorNode = (RangeOperatorNode)node.getChildren()[1];

            this.typeStack = new Stack <MiniPLTokenType>();
            INode leftExpression = rangeOperatorNode.getChildren()[0];

            this.typeStack.Push(MiniPLTokenType.TYPE_IDENTIFIER_INTEGER);
            accessChildren(leftExpression);
            if (this.typeStack.Pop() != MiniPLTokenType.TYPE_IDENTIFIER_INTEGER)
            {
                throw new SemanticException("Expected an integer. Wrong type in the left hand side of range operator.");
            }
            INode rightExpression = rangeOperatorNode.getChildren()[1];

            this.typeStack.Clear();
            this.typeStack.Push(MiniPLTokenType.TYPE_IDENTIFIER_INTEGER);
            accessChildren(rightExpression);
            if (this.typeStack.Pop() != MiniPLTokenType.TYPE_IDENTIFIER_INTEGER)
            {
                throw new SemanticException("Expected an integer. Wrong type in the right hand side of range operator.");
            }
        }