[swift-evolution] Obsoleting `if let`

[Brent Royal-Gordon]

> Right.  This makes sense to you, it makes sense to me, but it doesn’t make sense to most people using Swift.  More specifically, you can get a *long* way in Swift without understanding the depth of how pattern matching works in Swift, but if/let is inescapable.

I'm not continuing to push this approach—you guys obviously tested it and it didn't work out. I just figured I'd explain where it was coming from.

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Brent Royal-Gordon
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