- throw new ParseFailed(ParseFailed.error(ANSI.red("unexpected end of file\n"), token, hash.values()), getLocation());
- return true;
- }
-
- public Token.Location getLocation() { return location; }
-
- /** add a new node (merging with existing nodes if possible)
- * @param parent the parent of the new node
- * @param result the SPPF result corresponding to the new node
- * @param state the state that the new node is in
- * @param fromEmptyReduction true iff this node is being created as a result of a reduction of length zero (see GRMLR paper)
- * @param start the earliest part of the input contributing to this node (used to make merging decisions)
- */
- public boolean newNode(Node parent, Forest pending, State state, boolean fromEmptyReduction) {
- Node p = hash.get(state, parent==null?null:parent.phase());
- if (p != null) return newNode2(p, parent, pending, state, fromEmptyReduction);
- else return newNode3(parent, pending, state, fromEmptyReduction);
- }
- public void newNode(Node parent, Forest pending, State state, boolean fromEmptyReduction, Reduction reduction) {
- int pos = parent==null?0:parent.phase()==null?0:parent.phase().pos;
- Sequence owner = reduction==null ? null : reduction.position.owner();
- if (reduction!=null) {
- if (inhibited.contains(pos, owner)) return;
- if (owner.needs != null)
- for(Sequence s : owner.needs)
- if (!performed.contains(pos, s)) {
- waiting.add(s, new Waiting(parent, pending, state, fromEmptyReduction, reduction));
- return;
- }
- if ((owner.needed != null && owner.needed.size()>0) ||
- (owner.hated != null && owner.hated.size()>0) ||
- (owner.hates != null && owner.hates.size()>0))
- performed.add(pos, owner);
- }
- if (!owner.lame)
- newNode(parent, pending, state, fromEmptyReduction);
- if (reduction!=null) inhibit(reduction, parent==null?0:parent.phase().pos);
- if (reduction != null) {
- boolean redo = true;
- while(redo) {
- redo = false;
- for(Waiting w : waiting.getAll(owner)) {
- if (w.parent==parent || (parent!=null&&w.parent!=null&&w.parent.phase()==parent.phase())) {
- waiting.remove(owner, w);
- w.perform();
- redo = true;
- break;
- }
- }
- }
- }
- }
- private boolean newNode2(Node p, Node parent, Forest pending, State state, boolean fromEmptyReduction) {
- p.holder.merge(pending);
- if (p.parents().contains(parent)) return true;
- p.parents().add(parent, true);
- if (p!=parent && !fromEmptyReduction && reducing) p.performReductions(parent);
- return true;
- }
- private boolean newNode3(Node parent, Forest pending, State state, boolean fromEmptyReduction) {
- do {
- if (token != null && state.canShift(token)) break;
- if (state.isAccepting()) break;
- if (token==null) break;
- if (!state.canReduce(token)) return false;
- //if (count > 1) break;
- //if (r.numPop == 0) break;
- //r.reduce(pending, parent, null, Phase.this, null);
- //return;
- } while(false);
-
- Node n = new Node(parent, pending, state); // ALLOC
- if (reducing) {
- n.performEmptyReductions();
- if (!fromEmptyReduction) n.performReductions(parent);
- }