Type Alias CFSetCopyDescriptionCallBack 

pub type CFSetCopyDescriptionCallBack = Option<unsafe extern "C-unwind" fn(*const c_void) -> *const CFString>;

Available on crate feature CFSet only.

Type of the callback function used by CFSets for describing values.

Parameter value: The value to describe.

Returns: A description of the specified value.

See also Apple’s documentation

Aliased Type

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

Variants

None

No value.

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

Some value of type T.