!7

cmodule IWantYouToBe > DynPrintLog {
  class Rule1 implements RuleOnTok, RuleOnString, Runnable {
    LS pattern = wordTok("I want you to be my assistant");
    Set<S> vars = litciset("assistant");
    
    transient SS map; // not null if there is a match
    
    public void process(S s) { process(wordTok(s)); }
    public void process(LS tok) {
      map = nullIfContainsKeysOtherThan(gazelle_zipTwoTokenizationsToMap(pattern, tok), vars);
    }
    
    public void run {
      if (map != null)
        emit("I want that {you are my " + getOrKeep(map, "assistant") + "}");
    }
  }
  
  <A extends RuleOnString> A process(A rule, S s) {
    rule.process(s);
    ret rule;
  }
  
  start-thread {
    assertNull(process(new Rule1, "I want you to be his friend").map);
    printStruct(assertEquals(litcimap("assistant", "girl"),
      process(new Rule1, "I want you to be my girl").map));
    printDone();
  }
}