Contents

CFNull

Declaration

class CFNull

Overview

The CFNull opaque type defines a unique object used to represent null values in collection objects (which don’t allow NULL values). CFNull objects are neither created nor destroyed. Instead, a single CFNull constant object—kCFNull—is defined and is used wherever a null value is needed.

The CFNull opaque type is available in macOS 10.2 and later.

Topics

CFNull Miscellaneous Functions

Constants

See Also

Related Documentation

  • Collections Programming Topics for Core Foundation

Opaque Types