checkpoint

[sbp.git] / src / edu / berkeley / sbp / GSS.java

diff --git a/src/edu/berkeley/sbp/GSS.java b/src/edu/berkeley/sbp/GSS.java
index 645fa8f..7d13fb2 100644 (file)
--- a/src/edu/berkeley/sbp/GSS.java
+++ b/src/edu/berkeley/sbp/GSS.java
@@ -1,7 +1,5 @@
 package edu.berkeley.sbp;
 import edu.berkeley.sbp.*;
-import edu.berkeley.sbp.*;
-import edu.berkeley.sbp.*;
 import edu.berkeley.sbp.util.*;
 import java.io.*;
 import java.util.*;
@@ -30,7 +28,7 @@ class GSS {
     private Phase.Node[] reducing_list = null;
 
     /** corresponds to a positions <i>between tokens</i> the input stream; same as Tomita's U_i's */
-    public class Phase {
+    public class Phase implements Invokable<Parser.Table.State, Forest, GSS.Phase.Node> {
 
         /** the token immediately after this phase */
         public  final Token token;
@@ -125,8 +123,14 @@ class GSS {
             }
         }
 
+        public void invoke(Parser.Table.State st, Forest result, Node n) {
+            next.newNode(n, result, st, true, this);
+        }
+        private Phase next = null;
+
         /** perform all shift operations, adding promoted nodes to <tt>next</tt> */
         public void shift(Phase next, Forest result) {
+            this.next = next;
             closed = true;
             Forest res = null;
             boolean ok = false;
@@ -140,11 +144,14 @@ class GSS {
                 }
                 if (!n.holder.valid()) continue;
                 if (token == null) continue;
+                n.state.invokeShifts(token, this, result, n);
+                /*
                 for(Parser.Table.State st : n.state.getShifts(token)) {
                     if (res == null) res = result;
                     next.newNode(n, res, st, true, this);
                     ok = true;
                 }
+                */
             }
 
             if (!ok && token != null) {
@@ -175,10 +182,11 @@ class GSS {
         // GSS Nodes //////////////////////////////////////////////////////////////////////////////
 
         /** a node in the GSS */
-        public final class Node extends FastSet<Node> {
+        public final class Node extends FastSet<Node> implements Invokable<Parser.Table.Reduction, Node, Node> {
 
             public void addParent(Node parent, boolean fromEmptyReduction) {
-                parents().add(parent, true);
+                if (parents().contains(parent)) return;
+                parents().add(parent);
                 if (this!=parent && !fromEmptyReduction) queueReductions(parent);
             }
 
@@ -199,24 +207,44 @@ class GSS {
                 if (allqueued) return;
                 allqueued = true;
                 int where = parents().size();
+                /*
                 for(Parser.Table.Reduction r : state.getReductions(token))
-                    if (r.numPop >= 1)
+                    if (r.numPop > 0)
                         r.reduce(this);
+                */
+                state.invokeReductions(token, this, this, null);
             }
 
             public void queueReductions(Node n2) {
                 if (!allqueued) { queueReductions(); return; }
+                /*
                 for(Parser.Table.Reduction r : state.getReductions(token))
                     if (r.numPop > 0)
                         r.reduce(this, n2);
+                */
+                state.invokeReductions(token, this, this, n2);
             }
 
-
+            public final void invoke(Parser.Table.Reduction r, Node n, Node n2) {
+                if (n==null) {
+                    if (r.numPop==0) r.reduce(this);
+                    return;
+                }
+                if (r.numPop==0) return;
+                if (n2==null) {
+                    r.reduce(n);
+                } else {
+                    r.reduce(n, n2);
+                }
+            }
             public void queueEmptyReductions() {
-                if (reducing)
-                    for(Parser.Table.Reduction r : token==null ? state.getEofReductions() : state.getReductions(token))
+                if (!reducing) return;
+                /*
+                  for(Parser.Table.Reduction r : state.getReductions(token))
                         if (r.numPop==0)
                             r.reduce(this);
+                */
+                state.invokeReductions(token, this, null, null);
             }
 
             private Node(Node parent, Forest pending, Parser.Table.State state, Phase start) {