import edu.berkeley.sbp.*;
import edu.berkeley.sbp.*;
-/** an element which matches exactly one input token */
+/** <font color=green>an element which matches exactly one input token</font> */
public abstract class Atom<T> extends Element implements Topology<T> {
protected abstract Topology<T> top();
- public abstract String toString();
+ public abstract String toString();
public StringBuffer toString(StringBuffer sb) { sb.append(this); return sb; }
// Topology Thunks //////////////////////////////////////////////////////////////////////////////
public int hashCode() { return top().hashCode(); }
public boolean equals(Object o) { return o != null && o instanceof Atom && ((Atom)o).top().equals(top()); }
- // Subclasses //////////////////////////////////////////////////////////////////////////////
-
-
- public static Topology toAtom(Element e) {
- if (e instanceof Atom) return (Atom)e;
- if (e instanceof Sequence) return ((Sequence)e).toAtom();
- Topology ret = null;
- for(Sequence s : (Union)e)
- ret = ret==null ? toAtom(s) : ret.union(s.toAtom());
- return ret;
- }
}