The function that throws MyError might contain your error enum (or other types 
in general), but you would have to recover from MyType to the dynamic type 
first.



-- 
Adrian Zubarev
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Am 17. Februar 2017 um 20:26:48, Xiaodi Wu (xiaodi...@gmail.com) schrieb:

On Fri, Feb 17, 2017 at 1:22 PM, Adrian Zubarev via swift-evolution 
<swift-evolution@swift.org> wrote:
Sure thing, but that’s not what I was asking about. Kevin made a protocol that 
conforms to Error where all the his enums conformed to MyError protocol. That 
way we’re losing all enum cases and are not really a step further as before.


Sorry, can you elaborate? What do you mean by losing enum cases?

Am 17. Februar 2017 um 20:18:48, David Sweeris (daveswee...@mac.com) schrieb:


On Feb 17, 2017, at 11:12 AM, Adrian Zubarev via swift-evolution 
<swift-evolution@swift.org> wrote:

Is the throwing type always a protocol? In your example it is, but is this 
going to be always the case?

I think right now, there’s a bit of compiler magic in that you can only throw 
something that conforms to `Error`.

- Dave Sweeris

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