/// <summary>
/// Constructor for pre-order enumerator
/// </summary>
/// <param name="tree">Tree to enumerate through</param>
public PreOrderEnumerator(LeftRightTree <TNode, TValue> tree)
{
_tree = tree ?? throw new ArgumentNullException(nameof(tree));
_stack.Push(tree.Root);
}
public InOrderEnumerator(LeftRightTree <TNode, TValue> tree)
{
_tree = tree ?? throw new ArgumentNullException(nameof(tree));
_currentNode = tree.Root;
Current = default(TValue);
}
/// <summary>
/// Constructor for Output class.
/// </summary>
/// <param name="tree">Tree instance to print.</param>
/// <param name="textWriter"><seealso cref="TextWriter"/> to print to.</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="tree"/> or <paramref name="textWriter"/> is null.</exception>
public Output(LeftRightTree <TNode, TValue> tree, TextWriter textWriter)
{
_tree = tree ?? throw new ArgumentNullException(nameof(tree), "Tree cannot be null");
_textWriter = textWriter ?? throw new ArgumentNullException(nameof(textWriter), "Text writer cannot be null");
}