internal static CellTreeNode Flatten(CellTreeNode node)
{
// First do simple flattening and then associative op flattening
CellTreeNode newNode = FlatteningVisitor.Flatten(node);
AssociativeOpFlatteningVisitor visitor = new AssociativeOpFlatteningVisitor();
return(newNode.Accept <bool, CellTreeNode>(visitor, true));
}
// effects: Flattens node and returns a new tree that is flattened
internal static CellTreeNode Flatten(CellTreeNode node)
{
FlatteningVisitor visitor = new FlatteningVisitor();
return(node.Accept <bool, CellTreeNode>(visitor, true));
}
// effects: Given a cell tree node , removes unnecessary
// "nesting" that occurs in the tree -- an unnecessary nesting
// occurs when a node has exactly one child.
internal CellTreeNode Flatten()
{
return(FlatteningVisitor.Flatten(this));
}