/*Add a node to the end of the child list for this node */
public virtual void addChild(AST node)
{
if (node == null)
return;
BaseAST t = this.down;
if (t != null)
{
while (t.right != null)
{
t = t.right;
}
t.right = (BaseAST)node;
}
else
{
this.down = (BaseAST)node;
}
}
public virtual void setFirstChild(AST c)
{
down = (BaseAST)c;
}
public virtual void setNextSibling(AST n)
{
right = (BaseAST)n;
}
/*Remove all children */
public virtual void removeChildren()
{
down = null;
}