+ 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; }
+ }
+