private void AttachToStack(Stack <IContextExpression> stack, IContextExpression newNode)
{
if (stack.Any())
{
var parent = stack.Pop();
if (parent is ParentExpression)
{
if ((parent as ParentExpression).Child != null)
{
throw new ExpressionParseException(string.Format(
"Parent for {0} already full.",
newNode.GetType().Name));
}
(parent as ParentExpression).Child = newNode;
AttachToStack(stack, parent);
}
if (parent is NodeExpression)
{
if ((parent as NodeExpression).RightChild != null)
{
throw new ExpressionParseException(string.Format(
"Parent for {0} already full.",
newNode.GetType().Name));
}
(parent as NodeExpression).RightChild = newNode;
AttachToStack(stack, parent);
}
}
else
{
stack.Push(newNode);
}
}
