Type Alias CFSetCopyDescriptionCallBack 

pub type CFSetCopyDescriptionCallBack = Option<unsafe extern "C" fn(value: *const c_void) -> CFStringRef>;

Apple SDK type alias CFSetCopyDescriptionCallBack.

Aliased Type

pub enum CFSetCopyDescriptionCallBack {
    None,
    Some(unsafe extern "C" fn(*const c_void) -> *const __CFString),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*const c_void) -> *const __CFString)

Some value of type T.