QilTernary.cs

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namespace System.Xml.Xsl.Qil;
 
internal class QilTernary : QilNode
{
    private QilNode _left;
 
    private QilNode _center;
 
    private QilNode _right;
 
    public override int Count => 3;
 
    public override QilNode this[int index]
    {
        get
        {
            return index switch
            {
                0 => _left, 
                1 => _center, 
                2 => _right, 
                _ => throw new IndexOutOfRangeException(), 
            };
        }
        set
        {
            switch (index)
            {
            case 0:
                _left = value;
                break;
            case 1:
                _center = value;
                break;
            case 2:
                _right = value;
                break;
            default:
                throw new IndexOutOfRangeException();
            }
        }
    }
 
    public QilNode Left => _left;
 
    public QilNode Center
    {
        get
        {
            return _center;
        }
        set
        {
            _center = value;
        }
    }
 
    public QilNode Right
    {
        get
        {
            return _right;
        }
        set
        {
            _right = value;
        }
    }
 
    public QilTernary(QilNodeType nodeType, QilNode left, QilNode center, QilNode right)
        : base(nodeType)
    {
        _left = left;
        _center = center;
        _right = right;
    }
}