[swift-evolution] [Proposal] Protected Access Level

Pyry Jahkola pyry.jahkola at iki.fi
Mon May 30 01:09:21 CDT 2016

That's a cool hack! For a lighter way to distinguish overridable methods that one shouldn't ordinarily call, did anyone consider approximating "protected" (or as called in Objective-C speak, "private extension") methods with public class methods?

    public class UIView {
        public class func _layoutSubviews(_ view: UIView)

This way, they become overridable, won't show up in the editor auto completion list for a given instance, and can be called… but definitely make you think twice before you do!

— Pyry

> Callionica (Swift) via swift-evolution <swift-evolution at swift.org> kirjoitti 30.5.2016 kello 7.49:
> I've written up how to provide protected access control for Swift code today here:
> http://www.callionica.com/developer/#swift-protected
> No compiler changes necessary for this technique and it distinguishes between methods that can only be overridden and methods that can be both called and overridden.
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