pub type LPALGETBUFFERPTRSOFT = Option<unsafe extern "C" fn(buffer: ALuint, param: ALenum, value: *mut *mut ALvoid)>;
enum LPALGETBUFFERPTRSOFT { None, Some(unsafe extern "C" fn(_: u32, _: i32, _: *mut *mut c_void)), }
No value.
Some value of type T.
T