CFSetRetainCallBack
Prototype of a callback function used to retain a value being added to a set.
Declaration
typealias CFSetRetainCallBack = (CFAllocator?, UnsafeRawPointer?) -> UnsafeRawPointer?Parameters
- allocator:
The set’s allocator.
- value:
The value being added to the set.
Return Value
The value to store in the set, which is usually the value parameter passed to this callback, but may be a different value if a different value should be stored in the collection.
Discussion
This callback is passed to CFSetCreate(_:_:_:_:) in a CFSetCallBacks structure.