public class Reduction {
// FIXME: cleanup; almost everything in here could go in either Sequence.Position.getRewrite() or else in GSS.Reduct
/*private*/ final Position position;
- private final Forest[] holder; // to avoid constant reallocation
public int hashCode() { return position.hashCode(); }
public boolean equals(Object o) {
if (o==null) return false;
}
public Reduction(Position p) {
this.position = p;
- this.holder = new Forest[position.pos];
}
public String toString() { return "[reduce " + position + "]"; }
}
public void reduce(GSS.Phase.Node parent) {
- if (position.pos==0) finish(parent, zero(), parent.phase());
- else reduce(parent, position.pos-1, parent.phase());
+ Forest[] holder = new Forest[position.pos];
+ if (position.pos==0) finish(parent, zero(), parent.phase(), holder);
+ else reduce(parent, position.pos-1, parent.phase(), holder);
}
public void reduce(GSS.Phase.Node parent, GSS.Phase.Node onlychild) {
+ Forest[] holder = new Forest[position.pos];
if (position.pos<=0) throw new Error("called wrong form of reduce()");
int pos = position.pos-1;
Forest old = holder[pos];
holder[pos] = parent.pending();
if (pos==0) {
System.arraycopy(holder, 0, position.holder, 0, holder.length);
- finish(onlychild, position.rewrite(parent.phase().getLocation()), parent.phase());
+ finish(onlychild, position.rewrite(parent.phase().getLocation()), parent.phase(), holder);
} else {
- reduce(onlychild, pos-1, parent.phase());
+ reduce(onlychild, pos-1, parent.phase(), holder);
}
holder[pos] = old;
}
// FIXME: this could be more elegant and/or cleaner and/or somewhere else
- private void reduce(GSS.Phase.Node parent, int pos, GSS.Phase target) {
+ private void reduce(GSS.Phase.Node parent, int pos, GSS.Phase target, Forest[] holder) {
Forest old = holder[pos];
holder[pos] = parent.pending();
if (pos==0) {
System.arraycopy(holder, 0, position.holder, 0, holder.length);
for(int i=0; i<position.pos; i++) if (position.holder[i]==null) throw new Error("realbad");
Forest rex = position.rewrite(target.getLocation());
- for(GSS.Phase.Node child : parent.parents()) finish(child, rex, target);
+ for(GSS.Phase.Node child : parent.parents()) finish(child, rex, target, holder);
} else {
- for(GSS.Phase.Node child : parent.parents()) reduce(child, pos-1, target);
+ for(GSS.Phase.Node child : parent.parents()) reduce(child, pos-1, target, holder);
}
holder[pos] = old;
}
- private void finish(GSS.Phase.Node parent, Forest result, GSS.Phase target) {
+ private void finish(GSS.Phase.Node parent, Forest result, GSS.Phase target, Forest[] holder) {
State state = parent.state.gotoSetNonTerminals.get(position.owner());
if (result==null) throw new Error();
if (state!=null)