/** implement this method to create the output forest corresponding to a lone shifted input token */
public abstract Forest<Result> shiftToken(Tok t, Input.Location loc);
+ public boolean helpgc = true;
+
+ public String toString() { return pt.toString(); }
+
/** parse <tt>input</tt>, using the table <tt>pt</tt> to drive the parser */
public Forest<Result> parse(Input<Tok> input) throws IOException, ParseFailed {
GSS gss = new GSS();
Input.Location loc = input.getLocation();
- GSS.Phase current = gss.new Phase<Tok>(null, this, null, input.next(1, 0, 0), loc, null);
- current.newNode(null, Forest.leaf(null, null), pt.start, true);
+ GSS.Phase current = gss.new Phase<Tok>(null, this, null, input.next(), loc, null);
+ current.newNode(null, Forest.leaf(null, null, null), pt.start, true);
int count = 1;
- for(;;) {
+ for(int idx=0;;idx++) {
loc = input.getLocation();
current.reduce();
Forest forest = current.token==null ? null : shiftToken((Tok)current.token, loc);
- GSS.Phase next = gss.new Phase<Tok>(current, this, current, input.next(count, gss.resets, gss.waits), loc, forest);
+ GSS.Phase next = gss.new Phase<Tok>(current, this, current, input.next(), loc, forest);
+ if (!helpgc) {
+ FileOutputStream fos = new FileOutputStream("out-"+idx+".dot");
+ PrintWriter p = new PrintWriter(new OutputStreamWriter(fos));
+ GraphViz gv = new GraphViz();
+ for(Object n : next)
+ ((GSS.Phase.Node)n).toGraphViz(gv);
+ gv.dump(p);
+ p.flush();
+ p.close();
+ }
count = next.size();
if (current.isDone()) return (Forest<Result>)gss.finalResult;
current = next;
// Table //////////////////////////////////////////////////////////////////////////////
/** an SLR(1) parse table which may contain conflicts */
- public static class Table<Tok> extends Walk.Cache {
+ static class Table<Tok> extends Walk.Cache {
+
+ public String toString() {
+ StringBuffer sb = new StringBuffer();
+ sb.append("parse table");
+ for(State<Tok> state : all_states.values()) {
+ sb.append(" " + state + "\n");
+ for(Topology<Tok> t : state.shifts) {
+ sb.append(" shift \""+
+ new edu.berkeley.sbp.chr.CharTopology((IntegerTopology<Character>)t)+"\" => ");
+ for(State st : state.shifts.getAll(t))
+ sb.append(st.idx+" ");
+ sb.append("\n");
+ }
+ for(Topology<Tok> t : state.reductions)
+ sb.append(" reduce \""+
+ new edu.berkeley.sbp.chr.CharTopology((IntegerTopology<Character>)t)+"\" => " +
+ state.reductions.getAll(t) + "\n");
+ }
+ return sb.toString();
+ }
public final Walk.Cache cache = this;
/** a single state in the LR table and the transitions possible from it */
- public class State<Tok> implements Comparable<State<Tok>>, IntegerMappable, Iterable<Position> {
+ class State<Tok> implements Comparable<State<Tok>>, IntegerMappable, Iterable<Position> {
public final int idx = master_state_idx++;
private final HashSet<Position> hs;
}
}
+ public String toStringx() {
+ StringBuffer st = new StringBuffer();
+ for(Position p : this) {
+ if (st.length() > 0) st.append("\n");
+ st.append(p);
+ }
+ return st.toString();
+ }
public String toString() {
StringBuffer ret = new StringBuffer();
ret.append("state["+idx+"]: ");