Type Alias

CFBagReleaseCallBack

Prototype of a callback function used to release a value before it’s removed from a bag.

Declaration

typealias CFBagReleaseCallBack = (CFAllocator?, UnsafeRawPointer?) -> Void

Parameters

allocator

The bag’s allocator.

value

The value being removed from the bag.

Discussion

This callback is passed to CFBagCreate(_:_:_:_:) in a CFBagCallBacks structure.

See Also

Callbacks

typealias CFBagApplierFunction

Prototype of a callback function that may be applied to every value in a bag.

typealias CFBagCopyDescriptionCallBack

Prototype of a callback function used to get a description of a value in a bag.

typealias CFBagEqualCallBack

Prototype of a callback function used to determine if two values in a bag are equal.

typealias CFBagHashCallBack

Prototype of a callback function invoked to compute a hash code for a value. Hash codes are used when values are accessed, added, or removed from a collection.

typealias CFBagRetainCallBack

Prototype of a callback function used to retain a value being added to a bag.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software