[swift-corelibs-dev] NSCoding methods

Luke Howard lukeh at padl.com
Sat Dec 26 08:01:28 CST 2015

Another language thing I ran into ā€“ using classForKeyedArchiver/classForCoder is impossible because declarations from extensions cannot be overridden yet.

For example Iā€™d like to do:

internal class _NSCFString : NSMutableString {
    override var classForCoder: AnyClass {
        return NSMutableString.self

There are a few ways I can work around it but perhaps we can put these extensions directly on NSObject for now?

ā€” Luke
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