import edu.berkeley.sbp.*;
/** an element which matches exactly one input token */
-public abstract class Atom<T extends Token> extends Element implements Topology<T> {
+public abstract class Atom<T> extends Element implements Topology<T> {
protected abstract Topology<T> top();
public abstract String toString();
// Subclasses //////////////////////////////////////////////////////////////////////////////
- public static class Infer<T extends Token> extends Atom<T> {
+ public static class Infer<T extends Input> extends Atom<T> {
private final Element e;
public Infer(Element e) { this.e = e; }
public Topology<T> top() { return (Topology<T>)e.toAtom(); }
public String toString() { return e.toString(); /* FIXME should be toAtom() */ }
}
- public static class Invert<T extends Token> extends Atom<T> {
+ public static class Invert<T extends Input> extends Atom<T> {
private final Atom<T> a;
public Invert(Atom<T> a) { this.a = a; }
public Topology<T> top() { return ((Topology<T>)a.top()).complement(); }
public String toString() { return "~"+a; }
}
-
- public static class Hack<T extends Token> extends Atom<T> {
- private final Atom<T> a;
- static final Topology leftright =
- edu.berkeley.sbp.misc.CharToken.rightBrace.union(edu.berkeley.sbp.misc.CharToken.leftBrace);
- public Hack(Atom<T> a) { this.a = a; }
- public Topology<T> top() { return ((Topology<T>)a.top()).minus(leftright); }
- public String toString() { return "~"+a; }
- }
-
}