//------------------------------------------------------------------------------
// <copyright file="ReversePositionQuery.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>                                                                
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
 
namespace MS.Internal.Xml.XPath {
    using System;
    using System.Xml;
    using System.Xml.XPath;
    using System.Diagnostics;
 
    internal sealed class ReversePositionQuery : ForwardPositionQuery {
 
        public ReversePositionQuery(Query input) : base(input) { }
        private ReversePositionQuery(ReversePositionQuery other) : base(other) { }
        
        public override XPathNodeIterator Clone() { return new ReversePositionQuery(this); }
        public override int CurrentPosition { get { return outputBuffer.Count - count + 1; } }
        public override QueryProps Properties { get { return base.Properties | QueryProps.Reverse; } }
    }
}