Calls a function once for each value in a set.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The set 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. The
applierfunction must be able to work with all values in
A pointer-sized program-defined value, which is passed as the second parameter to the
applierfunction, but is otherwise unused by this function.
the is mutable, it is unsafe for the
applier function to change the contents of the collection.