System.Xml.Xsl.Xslt.QilGenerator.CompileXPathExpressionWithinAvt C# (CSharp) Method

        private QilNode CompileXPathExpressionWithinAvt(string expr, ref int pos)
        {
            Debug.Assert(expr != null);
            XPathScanner scanner;
            QilNode result;
            int startPos = pos;

            SetEnvironmentFlags(/*allowVariables:*/true, /*allowCurrent:*/true, /*allowKey:*/true);
            try
            {
                scanner = new XPathScanner(expr, pos);
                result = _xpathParser.Parse(scanner, _xpathBuilder, LexKind.RBrace);
                pos = scanner.LexStart + 1;
            }
            catch (XslLoadException e)
            {
                if (_xslVersion != XslVersion.ForwardsCompatible)
                {
                    ReportErrorInXPath(/*[XT0350][XT0360]*/e);
                }
                result = _f.Error(_f.String(e.Message));
                pos = expr.Length;
            }
            if (result is QilIterator)
            {
                result = _f.Nop(result);
            }
            return result;
        }