ParentQuery.cs

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using System.Xml.XPath;
 
namespace MS.Internal.Xml.XPath;
 
internal sealed class ParentQuery : CacheAxisQuery
{
    public ParentQuery(Query qyInput, string Name, string Prefix, XPathNodeType Type)
        : base(qyInput, Name, Prefix, Type)
    {
    }
 
    private ParentQuery(ParentQuery other)
        : base(other)
    {
    }
 
    public override object Evaluate(XPathNodeIterator context)
    {
        base.Evaluate(context);
        XPathNavigator xPathNavigator;
        while ((xPathNavigator = qyInput.Advance()) != null)
        {
            xPathNavigator = xPathNavigator.Clone();
            if (xPathNavigator.MoveToParent() && matches(xPathNavigator))
            {
                Query.Insert(outputBuffer, xPathNavigator);
            }
        }
        return this;
    }
 
    public override XPathNodeIterator Clone()
    {
        return new ParentQuery(this);
    }
}