macro.erl

-define(case_inf(E, E0, FC, E1, AC, E2, A, F, E3),
        begin
            AInf = (E),
            if
                not AInf ->
                    E0;
                is_function(AInf) ->
                    FC = AInf,
                    E1;
                is_tuple(AInf) andalso size(AInf) == 2 andalso is_function(element(2,AInf)) ->
                    A = element(1,AInf),
                    F = element(2,AInf),
                    E3;
                true ->
                    AC = AInf,
                    E2
            end
        end).