sclass EnglishDateParser > DateStructures {
  bool assumeFuture = true; // e.g. for "tuesday" [not used]
  LS tok;
  
  ItIt<ParsedWithTokens> parse(S s) {
    tok = javaTok(s);
    
    new L<ParsedWithTokens> out;
    L<ParsedWithTokens<Int>> years = lazyListFromIterator(nestedIterator parseYear(lai_codeTokens(tok));
    print(+years);
    out.addAll(years);
    
    for (ParsedWithTokens<Int> year : years)
      for (slash : parseFixedToken("/", year.remaining())
        out.add(pwt_combine(year!, year, slash));
        
    ret out;
  }
  
  ItIt<ParsedWithTokens<Int>> parseNumber(ListAndIndex<S> toParse) {
    ret mapI_nonNulls(pwt_followingTokens(1, 2, toParse),
      p -> isInteger(p!) ? p.withValue(parseInt(p!)) : null);
  }
  
  ItIt<ParsedWithTokens<Int>> parseYear(ListAndIndex<S> toParse) {
    ret filterI(parseNumber(toParse), p -> between(p!, 1900, 2100));
  }
  
  ItIt<ParsedWithTokens<S>> parseFixedToken(S token, ListAndIndex<S> toParse) {
    ret filterI(pwt_followingTokens(1, 2, toParse), p -> eqic(p!, token));
  }
}