Type Alias CFDictionaryRetainCallBack 

pub type CFDictionaryRetainCallBack = Option<unsafe extern "C" fn(allocator: CFAllocatorRef, value: *const c_void) -> *const c_void>;

Apple SDK type alias CFDictionaryRetainCallBack.

Aliased Type

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

Variants

None

No value.

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

Some value of type T.