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eliminated Parser.Table.Top
[sbp.git]
/
src
/
edu
/
berkeley
/
sbp
/
Union.java
diff --git
a/src/edu/berkeley/sbp/Union.java
b/src/edu/berkeley/sbp/Union.java
index
db0db7d
..
8780d9e
100644
(file)
--- a/
src/edu/berkeley/sbp/Union.java
+++ b/
src/edu/berkeley/sbp/Union.java
@@
-16,15
+16,13
@@
public class Union extends Element implements Iterable<Sequence> {
public Iterator<Sequence> iterator() { return alternatives.iterator(); }
public Iterator<Sequence> iterator() { return alternatives.iterator(); }
- void reachable(HashSet<Sequence.Position> h) { for(Sequence s : alternatives) s.reachable(h); }
-
Topology toAtom() {
if (alternatives.size()==0) throw new RuntimeException("cannot build an Atom from a Union with no productions");
Topology ret = null;
for(Sequence s : this) {
Topology a = s.toAtom();
Topology toAtom() {
if (alternatives.size()==0) throw new RuntimeException("cannot build an Atom from a Union with no productions");
Topology ret = null;
for(Sequence s : this) {
Topology a = s.toAtom();
- if (ret==null) ret = a.dup();
- else ret = ret.union(a.dup());
+ if (ret==null) ret = a;
+ else ret = ret.union(a);
}
if (ret==null) throw new RuntimeException("confusion on " + this);
return ret;
}
if (ret==null) throw new RuntimeException("confusion on " + this);
return ret;