[swift-evolution] [Pitch] Typed throws

[David Sweeris]

> On Feb 17, 2017, at 10:45 AM, Anton Zhilin via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Now this is on-topic, I guess.
> Last time we stopped at John McCall’s syntax:
> 
> extension MyError: Error { ... }
> 
> func foo() throws(MyError) -> MyResult
> It’s conservative and prevents visual ambiguity with extra parentheses.
> 
> If we (somewhat) agree on this, then submitting a proposal will be trivial.
> 
That mostly works for me. I’m a bit hesitant because I’m not sure how well that syntax would scale (if there are multiple types of errors that could be thrown). If the consensus is that such a scenario isn’t likely to be a problem in practice, then +1

- Dave Sweeris
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