DEFINE A;

DEFINE B;

IFDEF A THEN

  value a_should_be_present : int;

ENDIF;

IFNDEF C THEN

  value b_should_be_present : int;

ENDIF;

IFNDEF C THEN

  value c_should_be_present : int;

ELSE

  value a_should_NOT_be_present : int;

END;

IFDEF C THEN

  value b_should_NOT_be_present : int;

ELSE

  value d_should_be_present : int;

  value e_should_be_present : int;

ENDIF;

value f_should_be_present : int;