[swift-users] experimental conditional conformances flag

[Jens Persson]

Oh I forgot to include the step where I select the newly installed
toolchain ...

On Wed, Dec 6, 2017 at 9:24 AM, Jens Persson via swift-users <
swift-users at swift.org> wrote:

> I've now installed 2017-12-05 snapshot and can confirm that it too works
> for me.
> In more detail:
>
> 1. Install swift-DEVELOPMENT-SNAPSHOT-2017-12-05-a-osx.pkg
>
> 2. Restart Xcode (I'm using Xcode 9.2 (9C40b))
>     (I guess it shouldn't be necessary to restart, but I think it might be
> ...)
>
> 3. Create a new command line project.
>
> 4. Put -enable-experimental-conditional-conformances in Other Swift Flags
> in the project's Build Settings.
>
> 5. Enter the following code in main.swift and Build (which works without
> errors):
>
> protocol P {}
> struct S<T> {}
> extension S: P where T: P {}
>
>
> Regarding step 2. I'm not 100% sure, but I think that it might be
> necessary to restart Xcode after installing a new snapshot, because even if
> the new snapshot can be selected from the toolchains menu, it doesn't take
> affect until after restarting Xcode. I'm always restarting Xcode after
> installing and selecting a new toolchain. Someone please correct me if you
> can prove that this isn't necessary.
>
> /Jens
>
> On Wed, Dec 6, 2017 at 7:48 AM, Jens Persson via swift-users <
> swift-users at swift.org> wrote:
>
>> It works for me with Xcode 9.1 and 9.2 using latest dev snapshot (from
>> 2017-11-28 and 2017-12-03), I added -enable-experimental-conditional-conformances
>> in Other Swift Flags as you show in the screenshot.
>> /Jens
>>
>> On Wed, Dec 6, 2017 at 4:32 AM, Matt Whiteside via swift-users <
>> swift-users at swift.org> wrote:
>>
>>> Hello Swift Users,
>>>
>>> [This is a resend with smaller attachment]  Has anyone had luck passing
>>> the new '-enable-experimental-conditional-conformances' flag to Xcode?
>>> It works when I run swift from the command line, with the Dec. 5th snapshot
>>> toolchain, but not Xcode.  I have tried whats in the screenshot below as
>>> well as adding -Xfrontend, but I’m still getting the usual ‘extension of
>>> protocol cannot have an inheritance clause’ error:
>>>
>>> Thanks for any suggestions on this,
>>>
>>> Matt
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> swift-users mailing list
>>> swift-users at swift.org
>>> https://lists.swift.org/mailman/listinfo/swift-users
>>>
>>>
>>
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>>
>>
>
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