pub type rl_compdisp_func_t = Option<unsafe extern "C" fn(arg1: *mut *mut c_char, arg2: c_int, arg3: c_int)>;
pub enum rl_compdisp_func_t { None, Some(unsafe extern "C" fn(*mut *mut u8, i32, i32)), }
No value.
Some value of type T.
T