pub type LPALAUXILIARYEFFECTSLOTFV = Option<unsafe extern "C" fn(arg1: ALuint, arg2: ALenum, arg3: *const ALfloat)>;
enum LPALAUXILIARYEFFECTSLOTFV { None, Some(unsafe extern "C" fn(_: u32, _: i32, _: *const f32)), }
No value.
Some value of type T.
T