+ public Forest reduce(GSS.Phase.Node parent) {
+ if (numPop==0) return finish(parent, zero(), parent.phase());
+ return reduce(parent, numPop-1, null, parent.phase());
+ }
+
+ public Forest reduce(GSS.Phase.Node parent, GSS.Phase.Node onlychild) {
+ if (numPop<=0) throw new Error("called wrong form of reduce()");
+ int pos = numPop-1;
+ holder[pos] = parent.pending();
+ if (pos==0) {
+ System.arraycopy(holder, 0, position.holder, 0, holder.length);
+ return finish(onlychild, position.rewrite(parent.phase().getLocation()), parent.phase());
+ }
+ return reduce(onlychild, pos-1, null, parent.phase());
+ }
+