[swift-evolution] [Pitch] Add Null struct to Foundation

Alsey Miller colemancda at me.com
Wed Jun 22 23:14:21 CDT 2016

Add a struct Null to the Swift 3.0 Foundation value types. As a struct, Null is more performant (no ARC or memory allocation) than NSNull, and will be needed for Swift JSON decoders and libraries that want to use struct value types, and be free from classes for their model layer.


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