anchor.diff:      element(2, T).
   
   unbox(X) -> X.
  +
  +-ifdef(TEST).
  +-include_lib("eunit/include/eunit.hrl").
  +
  +int_test() ->
  +    5 = int(5),
  +    5 = int(5.6),
  +    5 = int("5"),
  +    ok.
  +
  +-endif.
  
positive.code: 
  ignore(_X) -> ok.
  
  max(A, B) ->
      erlang:max(A, B).
  
  
negative.code:          %incr/1,
           %infinity/0,
           %infinityf/0,
           int/1,
           %int16/1,
           %int32/1,
           %int64/1,
  