sclass EnglishDateParser > DateStructures {
  bool assumeFuture = true; // e.g. for "tuesday" [not used]
  ProbabilisticMachine2 pm;
  LS tok; // tokenized input
  
  class CompletedParse extends ProbabilisticMachine2.State {
    IntRange tokenRange; // what did we parse
    SomeDate interpretation; // what do we think it means
  }
  
  
  record ParseYear(int iTok) extends ProbabilisticMachine2.State {
    int minTokensToConsume = 0;
    
    double calcProbabilityForMatchedText(S s) {
    }
    
    void step {
      int maxTokensToConsume = state.remainingTokens();
    }

    @Override
    void run(State state) {
      
      if (verbose) print(this + ": maxTokensToConsume= " + maxTokensToConsume);
      
      for (int n = minTokensToConsume; n <= maxTokensToConsume; n++) {
        State s = state.prepareClone();
        s.iNextToken += n*2;
        LS tok = subList(state.tok, state.iNextToken, s.iNextToken-1);
        s.probability = multiplyPercentages(s.probability, calcProbabilityForMatchedTokens(tok));
        s.matches = revChainPlus(s.matches, pair(state, tok));
        pm.addState(s);
      }
    }
  }    
    
      if (isInteger(tok.get(iTok)))
        ret 
    }
  }
  
  record ScanFromToken(int iTok) extends ProbabilisticMachine2.State {
    void step() {
      if (i <= l(tok))
    }
  }

  SomeDate parse(S s) null {
    pm = new ProbabilisticMachine2;
    tok = javaTok(s);

    // let's try to parse a year just to get started
    
    pm.addState(new ScanFromToken(1));
  }
}

Began life as a copy of #1028540