Saxon » SaxonJS

In the for-each-group code (compare.js line 966) appears:

unsortedGroupIter.forEachItem(function (groupInfo, pos) {
                groupInfo.sortKeys =
                    sortKeys.map(function (s) {
                        var f = unsortedGroupContext.focus;
                        f.current = groupInfo.group[0];
                        f.position = pos + 1;
                        f.currentGroup = groupInfo.group;
                        f.currentGroupingKey = groupInfo.key;
                        return Expr.evalChild1(s, unsortedGroupContext).next();
                    });
            });

This is putting currentGroup and currentGroupingKey into the Tracker object (which is an iterator). However, in Expr.js line 472 and 480, we always get the values of currentGroup and currentGroupingKey from the Context object itself, not from the Tracker.