[swift-evolution] [Draft] Abolish IUO type

[Jed Lewison]

> On Mar 17, 2016, at 8:50 PM, Brent Royal-Gordon via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 	@autounwrapped let foo = functionReturningOptional()
> 
> I *believe* that, without the `@autounwrapped` attribute, there's no way to go from T? to T! without actually restating T somewhere.


I think you could express this as:

	let foo = functionReturningOptional()!
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