use std
    const main = {
        var p = person();
        p.setFirst("Jon");
        p.setLast("Snow");
        std.put(p.fullName());
    }
    type personType = struct
       getFirst : (->byte[:])
       getLast : (-> byte[:])
       setFirst : (n : byte[:] -> void)
       setLast : (n : byte[:] -> void)
       fullName : (-> byte[:])
;;
    const person : (-> personType) = {
       type personData = struct
          firstName: byte[]
          lastName: byte[]
       ;;

       var data : personData = std.mk([ firstName : "", lastName : ""]);
       var getFirst = {
        var f = data#.firstName;
        -> f;};
       var setFirst = {n : byte[:]
          data.firstName = n;
          ->void;};
      var getLast = {
         var l = data#.lastName;
          -> l;};
       var setLast = {n : byte[:]
          data.lastName = n;
          -> void};
       var fullName = {
          var full = std.strcat(std.strcat(data#.lastName, ", "),data.firstName);
          -> full;};
       -> [.getFirst=getFirst, .getLast=getLast, .setFirst=setFirst, .setLast=setLast, .fullName=fullName]
    }