public boolean canShift(Token t) { return shifts.contains(t); }
public Iterable<State> getShifts(Token t) { return shifts.get(t); }
public boolean isAccepting() { return accept; }
- public Iterable<Reduction> getReductions(Token t) { return reductions.get(t); }
+ public Iterable<Reduction> getReductions(Token t) { return t==null ? eofReductions : reductions.get(t); }
public Iterable<Reduction> getEofReductions() { return eofReductions; }
public Iterator<Position> iterator() { return hs.iterator(); }
}
public String toString() { return "[reduce " + position + "]"; }
- public Forest reduce(GSS.Phase.Node parent, GSS.Phase.Node onlychild, Forest rex) {
- Forest ret = reduce(parent, numPop-1, rex, onlychild, parent.phase());
+ public Forest reduce(GSS.Phase.Node parent) {
+ Forest rex = numPop==0 ? zero() : null;
+ Forest ret = reduce(parent, numPop-1, rex, null, parent.phase());
return ret;
}
+ public Forest reduce(GSS.Phase.Node parent, GSS.Phase.Node onlychild) {
+ int pos = numPop-1;
+ if (pos>=0) holder[pos] = parent.pending();
+ Forest rex = null;
+ if (pos==0) {
+ if (rex==null) {
+ System.arraycopy(holder, 0, position.holder, 0, holder.length);
+ rex = position.rewrite(parent.phase().getLocation());
+ }
+ }
+ return reduce(onlychild, pos-1, rex, null, parent.phase());
+ }
+
private Forest zero = null;
public Forest zero() {
if (zero != null) return zero;