[swift-evolution] [Pitch] Requiring proactive overrides for default protocol implementations.

Matthew Johnson matthew at anandabits.com
Thu Apr 28 17:59:25 CDT 2016

Sent from my iPad

> On Apr 28, 2016, at 5:49 PM, Erica Sadun <erica at ericasadun.com> wrote:
>> On Apr 28, 2016, at 12:18 PM, Matthew Johnson <matthew at anandabits.com> wrote:
>> We can't add the keywords if the structs are defined in a module we import but don't own.  We are only declaring the conformance retroactively.  The ability to do this is a crucial aspect of generic programming.  It isn't yet clear how your proposal handles retroactive modeling.
> These are compile-time checks and should not affect compiled code.

Does that mean the conformance declaration will be accepted by the compiler under your proposal?  I would really like to see this called out explicitly in the proposal.

> -- E
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