Prototype of a callback function that may be applied to every value in a bag.
- iOS 2.0+
- macOS 10.0+
- tvOS 9.0+
- watchOS 2.0+
- Mac Catalyst 13.0+Beta
The current value in a bag.
The program-defined context parameter given to the apply function.
This callback is passed to the
CFBagApplyFunction(_:_:_:) function which iterates over the values in a bag and applies the behavior defined in the applier function to each value in a bag.
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.
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