typedef a = ()()?; // ERROR one must use ^? here
()() b; // ERROR trying to allocate a function!
typedef c = ( // ERROR function type must be in a pointer type (should really appear on the line below...)
    int() bad,
);
/* ERRORS must be in pointer types */
typedef d = func();
int(int x)#[1] e;
(int(int x) fun) f;
func g;

/* ERRORS function type does not have a value */
enum ()() h;

typedef func = ()();