Calls a function once for each value in a bag.
- iOS 2.0+
- macOS 10.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The bag to operate upon.
The callback function to call once for each value in the
the. If this parameter is not a pointer to a function of the correct prototype, the behavior is undefined. If there are values in the range that the
applierfunction does not expect or cannot properly apply to, the behavior is undefined.
A pointer-sized program-defined value, which is passed as the second parameter to the
applierfunction, but is otherwise unused by this function. If the context is not what is expected by the applier function, the behavior is undefined.
While this function iterates over a mutable collection, it is unsafe for the
applier function to change the contents of the collection.