Type Alias CFTreeCopyDescriptionCallBack 

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

Apple SDK type alias CFTreeCopyDescriptionCallBack.

Aliased Type

pub enum CFTreeCopyDescriptionCallBack {
    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.