CFNumberGetValue

CFNumberGetValue is a function within the Core Foundation framework provided by Apple Inc. It is used to retrieve the value of a Core Foundation number, which can be of various data types such as integer, floating point, boolean, etc.

The function expects two main parameters: a CFNumberRef object, and an EntityManager object that conforms to the CFNumberContext protocol. The CFNumber drawing context is used to specify the type of data retrieved from the CFNumber. The function returns the actual value of the CFNumber based on the specified type.

CFNumberGetValue can be used to retrieve values from CFNumber objects created by other functions, such as CFNumberCreate. It also supports the creation of mutable numbers passed per reference, which are less commonly used. The function is useful in scenarios where the values of CFNumber objects need to be accessed, especially when working with Core Foundation types in Objective-C or Swift programming languages.

The function CFNumberGetValue is not documented in some of Apple's older frameworks and may not be widely adopted or compatible with all platforms. However, it is stable in many environments and can be considered for use in projects with Core Foundation requirements.

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