Thanks for clarification.
I’ve created a bug report: https://bugs.swift.org/browse/SR-2915
> On 10 Oct 2016, at 19:57, Joe Groff <jgr...@apple.com> wrote:
>> On Oct 10, 2016, at 10:53 AM, Sebastian Hagedorn <sebast...@iosphere.de>
>> “Forever” is pretty long-term ;)
>> Since it is currently *not* possible for tuples to conform to protocols,
>> isn’t it worth a warning (if my assumption that this would be easy to
>> implement is correct), even if it may be obsolete in the future?
> Yeah, even for non-tuples it may be worthwhile to offer a warning that there
> isn't a currently-visible protocol conformance for the type of the operand
> when it's a concrete type. You could easily enough silence the warning by
> writing 'as Any as? P' or something like that if you really want to.
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