Function

CFSetGetValue(_:_:)

Obtains a specified value from a set.

Declaration

func CFSetGetValue(_ theSet: CFSet!, _ value: UnsafeRawPointer!) -> UnsafeRawPointer!

Parameters

theSet

The set to examine.

value

The value for which to search in theSet. Comparisons are made using the equal callback provided when theSet was created. If the equal callback was NULL, pointer equality (in C, ==) is used.

Return Value

A pointer to the requested value, or NULL if the value is not in theSet. If the value is a Core Foundation object, Ownership follows the The Get Rule.

Discussion

Since this function uses the equal callback, value all elements in the set must be understood by the equal callback. Depending on the implementation of the equal callback specified when creating theSet, the value returned may not have the same pointer equality as value.

See Also

Examining a Set

func CFSetContainsValue(CFSet!, UnsafeRawPointer!) -> Bool

Returns a Boolean that indicates whether a set contains a given value.

func CFSetGetCount(CFSet!) -> CFIndex

Returns the number of values currently in a set.

func CFSetGetCountOfValue(CFSet!, UnsafeRawPointer!) -> CFIndex

Returns the number of values in a set that match a given value.

func CFSetGetValueIfPresent(CFSet!, UnsafeRawPointer!, UnsafeMutablePointer<UnsafeRawPointer?>!) -> Bool

Reports whether or not a value is in a set, and if it exists returns the value indirectly.

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