anchor.diff:              {ok, to_bin(Val)}
       end;
   
  -%%% Luerl-style lists
  +
  +%% Luerl-style lists
   %%spec(list, [{1, _}|_]=Val) ->
   %%    lager:error("NKLOG VV0 ~p", [Val]),
   %%    spec(list, [V || {_, V} <- Val]);
  
positive.code:             error
      end;
  
  spec({atom_or_binary, List}, Val) ->
      case to_existing_atom(Val) of
          {ok, Atom} ->
              case lists:member(Atom, List) of
  
negative.code:         error -> error
      end;
  
  spec({atom, List}, Val) when is_list(List) ->
      case to_existing_atom(Val) of
          {ok, Atom} ->
              case lists:member(Atom, List) of
  