[swift-evolution] [Review] SE-0117: Default classes to be non-subclassable publicly

[Brent Royal-Gordon]

> On Jul 5, 2016, at 7:16 PM, Karl via swift-evolution <swift-evolution at swift.org> wrote:
> 
> #1 - “extendable class”    // explicitly clear about what I’m allowing

The problem is that it's very clear about what you're allowing—you're allowing `extension`s. Which of course isn't *actually* what you're allowing.

-- 
Brent Royal-Gordon
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