InteriorNode.cs

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using System.Collections.Generic;
 
namespace System.Xml.Schema;
 
internal abstract class InteriorNode : SyntaxTreeNode
{
    private SyntaxTreeNode _leftChild;
 
    private SyntaxTreeNode _rightChild;
 
    public SyntaxTreeNode LeftChild
    {
        get
        {
            return _leftChild;
        }
        set
        {
            _leftChild = value;
        }
    }
 
    public SyntaxTreeNode RightChild
    {
        get
        {
            return _rightChild;
        }
        set
        {
            _rightChild = value;
        }
    }
 
    protected void ExpandTreeNoRecursive(InteriorNode parent, SymbolsDictionary symbols, Positions positions)
    {
        Stack<InteriorNode> stack = new Stack<InteriorNode>();
        InteriorNode interiorNode = this;
        while (interiorNode._leftChild is ChoiceNode || interiorNode._leftChild is SequenceNode)
        {
            stack.Push(interiorNode);
            interiorNode = (InteriorNode)interiorNode._leftChild;
        }
        interiorNode._leftChild.ExpandTree(interiorNode, symbols, positions);
        while (true)
        {
            if (interiorNode._rightChild != null)
            {
                interiorNode._rightChild.ExpandTree(interiorNode, symbols, positions);
            }
            if (stack.Count != 0)
            {
                interiorNode = stack.Pop();
                continue;
            }
            break;
        }
    }
 
    public override void ExpandTree(InteriorNode parent, SymbolsDictionary symbols, Positions positions)
    {
        _leftChild.ExpandTree(this, symbols, positions);
        if (_rightChild != null)
        {
            _rightChild.ExpandTree(this, symbols, positions);
        }
    }
}