System.Xml.Xsl.Xslt.QilGenerator.CompileSort C# (CSharp) Méthode

        private void CompileSort(Sort sort, QilList keyList, ref LoopFocus parentLoop)
        {
            Debug.Assert(sort.NodeType == XslNodeType.Sort);
            QilNode select, select2, lang, order, caseOrder;
            bool fwdCompat;

            EnterScope(sort);
            fwdCompat = sort.ForwardsCompatible;

            select = CompileXPathExpression(sort.Select);

            if (sort.Lang != null || sort.DataType != null || sort.Order != null || sort.CaseOrder != null)
            {
                // Calculate these attributes in the context of the parent loop
                LoopFocus curLoopSaved = _curLoop;
                _curLoop = parentLoop;

                lang = CompileLangAttribute(sort.Lang, fwdCompat);

                CompileDataTypeAttribute(sort.DataType, fwdCompat, ref select, out select2);

                order = CompileOrderAttribute(
                    /*attName:  */  "order",
                    /*attValue: */  sort.Order,
                    /*value0:   */  "ascending",
                    /*value1:   */  "descending",
                    /*fwdCompat:*/  fwdCompat
                );

                caseOrder = CompileOrderAttribute(
                    /*attName:  */  "case-order",
                    /*attValue: */  sort.CaseOrder,
                    /*value0:   */  "lower-first",
                    /*value1:   */  "upper-first",
                    /*fwdCompat:*/  fwdCompat
                );

                // Restore loop context
                _curLoop = curLoopSaved;
            }
            else
            {
                select = _f.ConvertToString(select);
                select2 = lang = order = caseOrder = null;
            }

            _strConcat.Reset();
            _strConcat.Append(XmlReservedNs.NsCollationBase);
            _strConcat.Append('/');
            _strConcat.Append(lang);

            char separator = '?';
            if (order != null)
            {
                _strConcat.Append(separator);
                _strConcat.Append("descendingOrder=");
                _strConcat.Append(order);
                separator = '&';
            }
            if (caseOrder != null)
            {
                _strConcat.Append(separator);
                _strConcat.Append("upperFirst=");
                _strConcat.Append(caseOrder);
                separator = '&';
            }

            QilNode collation = _strConcat.ToQil();

            QilSortKey result = _f.SortKey(select, collation);
            // Line information is not copied
            keyList.Add(result);

            if (select2 != null)
            {
                result = _f.SortKey(select2, collation.DeepClone(_f.BaseFactory));
                // Line information is not copied
                keyList.Add(result);
            }

            ExitScope();
        }