no longer need to thread a Grammar through Parser.Table

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

diff --git a/src/edu/berkeley/sbp/Sequence.java b/src/edu/berkeley/sbp/Sequence.java
index eff94a4..f63c30a 100644 (file)
--- a/src/edu/berkeley/sbp/Sequence.java
+++ b/src/edu/berkeley/sbp/Sequence.java
@@ -127,9 +127,9 @@ public abstract class Sequence implements Iterable<Element>, SequenceOrElement {
         this.firstp = new Position(this, 0, null);
     }
 
-    abstract Forest epsilonForm(Input.Region loc, Grammar cache);
+    abstract Forest epsilonForm(Input.Region loc);
 
-    protected abstract <T> Forest<T> postReduce(Input.Region loc, Forest<T>[] args, Pos p);
+    protected abstract <T> Forest<T> postReduce(Input.Region loc, Forest<T>[] args, Position p);
 
 
     // Position //////////////////////////////////////////////////////////////////////////////
@@ -158,7 +158,7 @@ public abstract class Sequence implements Iterable<Element>, SequenceOrElement {
         abstract Element  element();
 
         public abstract int numPops();
-        public abstract <T> Forest<T> rewrite(Input.Region loc, Grammar cache);
+        public abstract <T> Forest<T> rewrite(Input.Region loc);
     }
 
     /** the imaginary position before or after an element of a sequence; corresponds to an "LR item" */
@@ -171,12 +171,10 @@ public abstract class Sequence implements Iterable<Element>, SequenceOrElement {
                 public int[] hates();
                 public boolean            owner_needed_or_hated();
                 public int numPops();
-                public <T> Forest<T> rewrite(Input.Region loc, Grammar cache)
+                public <T> Forest<T> rewrite(Input.Region loc)
             };
         }
         */
-        public int ord = -1;
-        public int ord()     { return ord; }
         public int numPops() { return pos; }
 
                 final     int      pos;
@@ -220,14 +218,14 @@ public abstract class Sequence implements Iterable<Element>, SequenceOrElement {
 
         // Position /////////////////////////////////////////////////////////////////////////////////
 
-        public final <T> Forest<T> rewrite(Input.Region loc, Grammar cache) {
-            if (this==firstp()) epsilonForm(loc, cache);
+        public final <T> Forest<T> rewrite(Input.Region loc) {
+            if (isFirst()) owner().epsilonForm(loc);
             for(int i=0; i<pos; i++) if (holder[i]==null) throw new Error("realbad " + i);
-            for(int i=pos; i<elements.length; i++) {
-                if (holder[i]==null) holder[i] = ((Union)elements[i]).epsilonForm(loc, cache);
+            for(int i=pos; i<owner().elements.length; i++) {
+                if (holder[i]==null) holder[i] = ((Union)owner().elements[i]).epsilonForm(loc);
                 if (holder[i]==null) throw new Error("bad");
             }
-            return Sequence.this.postReduce(loc, holder, this);
+            return owner().postReduce(loc, holder, this);
         }
 
         public String   toString() {
@@ -272,7 +270,6 @@ public abstract class Sequence implements Iterable<Element>, SequenceOrElement {
         return sb;
     }
 
-
     // Specialized Subclasses //////////////////////////////////////////////////////////////////////////////
 
     static class Singleton extends Sequence {
@@ -281,8 +278,8 @@ public abstract class Sequence implements Iterable<Element>, SequenceOrElement {
         public Singleton(Element[] e, int idx) { super(e); this.idx = idx; }
         public <T> Forest<T> postReduce(Input.Region loc, Forest<T>[] args, Position p) { return args[idx]; }
         Sequence _clone() { return new Singleton(elements,idx); }
-        Forest epsilonForm(Input.Region loc, Grammar cache) {
-            return ((Union)elements[idx]).epsilonForm(loc, cache);
+        Forest epsilonForm(Input.Region loc) {
+            return ((Union)elements[idx]).epsilonForm(loc);
         }
     }
 
@@ -321,7 +318,7 @@ public abstract class Sequence implements Iterable<Element>, SequenceOrElement {
             if (spacing) for(int i=0; i<50-len; i++) sb.append(' ');
             return sb;
         }
-        Forest epsilonForm(Input.Region loc, Grammar cache) {
+        Forest epsilonForm(Input.Region loc) {
             return Forest.create(loc, tag, new Forest[0], lifts);
         }
     }