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  "title" : "Core Foundation Data Types"
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# Core Foundation Data Types

## Topics

### Data Types

[`typealias CFAllocatorTypeID`](/documentation/CoreFoundation/CFAllocatorTypeID)

[`struct CFCalendarIdentifier`](/documentation/CoreFoundation/CFCalendarIdentifier)

[`struct CFDateFormatterKey`](/documentation/CoreFoundation/CFDateFormatterKey)

[`typealias CFErrorDomain`](/documentation/CoreFoundation/CFErrorDomain)

[`struct CFLocaleIdentifier`](/documentation/CoreFoundation/CFLocaleIdentifier)

[`struct CFLocaleKey`](/documentation/CoreFoundation/CFLocaleKey)

[`struct CFNotificationName`](/documentation/CoreFoundation/CFNotificationName)

[`struct CFNumberFormatterKey`](/documentation/CoreFoundation/CFNumberFormatterKey)

[`struct CFRunLoopMode`](/documentation/CoreFoundation/CFRunLoopMode)

[`struct CFStreamPropertyKey`](/documentation/CoreFoundation/CFStreamPropertyKey)

[`typealias CFTypeRef`](/documentation/CoreFoundation/CFTypeRef)

An untyped “generic” reference to any Core Foundation object.

[`typedef double CGFloat;`](/documentation/CoreFoundation/CGFloat-c.typealias)

The basic type for all floating-point values.

[`typedef SInt32 HRESULT;`](/documentation/CoreFoundation/HRESULT)

[`typedef void * LPVOID;`](/documentation/CoreFoundation/LPVOID)

[`typedef CFUUIDBytes REFIID;`](/documentation/CoreFoundation/REFIID)

[`typedef UInt32 ULONG;`](/documentation/CoreFoundation/ULONG)


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