/**
* <summary> Basic constructor for a ParseTree. Initializes the root node with the input.</summary>
* <param name="root">Root node of the tree</param>
*/
public ParseTree(ParseNode root)
{
this.root = root;
}
/**
* <summary> Empty constructor for ParseTree. Initializes the root node to null.</summary>
*/
public ParseTree()
{
root = null;
}