public boolean isFrontier() { return hash!=null; }
/** perform all shift operations, adding promoted nodes to <tt>next</tt> */
- private void shift(Phase next, Forest result) throws ParseFailed {
+ private void shift(Phase next, Forest f) throws ParseFailed {
this.next = next;
// this massively improves GC performance
if (prev != null) {
finalResult.merge(r.getForest());
}
if (token == null) continue;
- n.state().invokeShifts(token, this, new Result(result, n, null));
+ Result result = new Result(f, null, null);
+ result.addParent(n);
+ n.state().invokeShifts(token, this, result);
}
numNewNodes = next==null ? 0 : next.hash.size();
viewPos = this.pos;
if (!state.canReduce(token)) return false;
} while(false);
Node n = new Node(Phase.this, result, state, fromEmptyReduction); // ALLOC
+ /** FIXME: this null-result can be used to notice bogus/dead states */
for(Object s : state.conjunctStates)
newNode(new Result(null, n, null), (State)s, fromEmptyReduction);
return !n.state().doomed();