[swift-evolution] Winding down the Swift 3 release

Ryan Lovelett swift-dev at ryan.lovelett.me
Mon May 16 13:53:20 CDT 2016

On Mon, May 16, 2016, at 11:18 AM, Chris Lattner via swift-evolution
> Hi Everyone,
> As we get deeper into the Swift 3 release cycle, we’re beginning to have
> a more precise understanding about what the release will shape up to be. 
> Ted posted details of the Swift 3 release process last week
> (https://swift.org/blog/swift-3-0-release-process/) and I just updated
> the main swift-evolution README.md file
> (https://github.com/apple/swift-evolution) with some updated details
> about the goals of Swift 3.

I noticed this comment on Hacker News:

The comment brought up a question about the "Portability" section
disappearing from the README. Until reading that comment I had not
noticed the removal of the goal. But upon examination I would like to
know what the implication of that removal is.

Would you mind expanding on the implications of that section
disappearing? Just an accidental omission? Is portability now considered
done/achieved? Or are the core team members throwing in the towel on
that goal? (Perhaps it is some variation on those themes or something
completely different)

> This release is shaping up to be a really phenomenal release that will
> redefine the feel of Swift and make a major leap towards maturing the
> Swift language and development experience.  We have had a focus on
> getting to source stability, with the forward-looking goal of making
> Swift 4 as source compatible with Swift 3 as we can reasonably
> accomplish.  It tackled API naming head on (which is one of the hardest
> problems in computer science [1]), made major improvements to the
> consistency and feel of the language, and has several nice across the
> board additions.
> That said, it is also clear at this point that some of the loftier goals
> that we started out with aren’t going to fit into the release - including
> some of the most important generics features needed in order to lock down
> the ABI of the standard library. As such, the generics and ABI stability
> goals will roll into a future release of Swift, where I expect them to be
> the *highest* priority features to get done.
> I expect discussion and planning for Swift 3.x and Swift 4 to start
> sometime around August of this year.  Until then, it is very important
> that we as a community stay focused on the goals of Swift 3: I’d really
> prefer us all to resist the urge to discuss major blue sky features for
> future releases.  We would also like to put a significant amount of
> effort into bug fixing and quality refinements as well, which means that
> the core team will be proactively deferring evolution proposals to later
> releases that don’t align with the Swift 3 goals, especially those that
> are strictly additive.
> Thank you for all of the amazing community that has developed on this
> list, it is great to work with you all!  Let us know if you have any
> questions,
> -Chris
> [1] It is well known that the two hard problems in Computer Science are
> naming, cache invalidation, and off-by-one errors.
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