FREE
FREE,
#define FREE(T, x, ...) _param_free(¶ms->x);
#undef FREE
#define FREE(T, x, ...) _param_free(¶ms->x);
#undef FREE
X(RM, FREE) //10
X(RM, FREE, 10)
FREE = 0,
FREE = 0, CHEAP, EXPENSIVE, END
#define FREE BIT(9)