pub type kgets_func2 = Option<unsafe extern "C" fn(arg1: *mut c_char, arg2: size_t, arg3: *mut c_void) -> ssize_t>;
enum kgets_func2 { None, Some(unsafe extern "C" fn(_: *mut i8, _: u32, _: *mut c_void) -> i32), }
No value.
Some value of type T.
T