System.Xml.XPath.XPathNavigator.Matches C# (CSharp) Method

        public virtual bool Matches(XPathExpression expr)
        {
            CompiledXpathExpr cexpr = expr as CompiledXpathExpr;
            if (cexpr == null)
                throw XPathException.Create(SR.Xp_BadQueryObject);

            // We should clone query because some Query.MatchNode() alter expression state and this may brake
            // SelectionIterators that are running using this Query
            // Example of MatchNode() that alert the state is FilterQuery.MatchNode()
            Query query = Query.Clone(cexpr.QueryTree);

            try
            {
                return query.MatchNode(this) != null;
            }
            catch (XPathException)
            {
                throw XPathException.Create(SR.Xp_InvalidPattern, cexpr.Expression);
            }
        }

	public override string GetNodeXPath (XPathNavigator n)
	{
		if (n.Matches ("/Type/Docs/param")) {
			string type_name = (string) n.Evaluate ("string (ancestor::Type/@FullName)");
			string param_name = (string) n.Evaluate ("string (@name)");
			
			return String.Format ("/Type [@FullName = '{0}']/Docs/param[@name='{1}']", type_name, param_name);
		}

		if (n.Matches ("/Type/Docs/*")) {
			string type_name = (string) n.Evaluate ("string (ancestor::Type/@FullName)");
			
			return String.Format ("/Type [@FullName = '{0}']/Docs/{1}", type_name, n.Name);
		}
		
		if (n.Matches ("/Type/Members/Member/Docs/*")) {
			string type_name = (string) n.Evaluate ("string (ancestor::Type/@FullName)");
			string member_name = (string) n.Evaluate ("string (ancestor::Member/@MemberName)");
			string member_sig = (string) n.Evaluate ("string (ancestor::Member/MemberSignature [@Language='C#']/@Value)");
			string param_name = (string) n.Evaluate ("string (@name)");
			
			if (param_name == null || param_name == "") {
				return String.Format (
				"/Type [@FullName = '{0}']/Members/Member [@MemberName = '{1}'][MemberSignature [@Language='C#']/@Value = '{2}']/Docs/{3}",
				type_name, member_name, member_sig, n.Name);
			} else {
				return String.Format (
				"/Type [@FullName = '{0}']/Members/Member [@MemberName = '{1}'][MemberSignature [@Language='C#']/@Value = '{2}']/Docs/param [@name = '{3}']",
				type_name, member_name, member_sig, param_name);
			}
		}
		
		Message (TraceLevel.Warning, "WARNING: Was not able to get clean XPath expression for node {0}", EditingUtils.GetXPath (n));
		return base.GetNodeXPath (n);
	}