[swift-evolution] [Proposal] Explicit Non-Default-Implemented Protocol Requirements

Tino Heth 2th at gmx.de
Wed Aug 2 11:31:38 CDT 2017

> Consider these two alternative ways of writing the same code:
> https://gist.github.com/technogen-gg/17b6d5e13c13080850dceda28cfe1caa <https://gist.github.com/technogen-gg/17b6d5e13c13080850dceda28cfe1caa>
Great example — the first is better.
But not because of extensions: 
// MARK: - String Compatibility
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