Type Alias

CFBagEqualCallBack

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

Declaration

typedef Boolean (*CFBagEqualCallBack)(const void *value1, const void *value2);

Parameters

value1

A value in the bag.

value2

Another value in the bag.

Return Value

true if value1 and value2 are equal, false otherwise.

Discussion

This callback is passed to CFBagCreate in a CFBagCallBacks structure.

See Also

Callbacks

CFBagApplierFunction

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

CFBagCopyDescriptionCallBack

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

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.

CFBagReleaseCallBack

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

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