pub type qht_iter_func_t = Option<unsafe extern "C" fn(ht: *mut qht, p: *mut c_void, h: u32, up: *mut c_void)>;
pub enum qht_iter_func_t { None, Some(unsafe extern "C" fn(*mut qht, *mut c_void, u32, *mut c_void)), }
No value.
Some value of type T.
T