Contents

CFSetHashCallBack

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

Declaration

typealias CFSetHashCallBack = (UnsafeRawPointer?) -> CFHashCode

Parameters

  • value:

    The value used to compute the hash code.

Return Value

An integer that can be used as a table address in a hash table structure.

Discussion

This callback is passed to CFSetCreate(_:_:_:_:) in a CFSetCallBacks structure.

See Also

Callbacks