[swift-evolution] Why is the status of SE-0110 "implemented"?
rjmccall at apple.com
Mon Jun 5 19:45:01 CDT 2017
> On Jun 5, 2017, at 12:08 AM, Jens Persson via swift-evolution <swift-evolution at swift.org> wrote:
> So the bug in the reflective type system needs to be fixed before SE-0110 can actually be implemented (so that the statements in its title and text are true when compared to the actual behavior of the current Swift 4 compiler),
Gaps in the reflective type system are bugs, but they are not showstopper bugs. We do not even expose any way to query the reflective system today; it basically only affects type equality and dynamic casts that programmers are very unlikely to use. The changes in call type-checking are vastly more important, are implemented (modulo bugs, of course), and by themselves warrant calling SE-0110 implemented.
> And yet:
> 1. The status of SE-0110 is "Implemented"
> 2. These statuses of the following issues are "resolved":
> SR-2008: Distinguish between single-tuple and multiple-argument function types
> SR-2216: Confusing behavior related to closure types and tuples
> SR-296: Fix inconsistencies related to tuples, arg/param lists, type params, typealiases
> On Sun, Jun 4, 2017 at 5:49 PM, Ben Rimmington <me at benrimmington.com <mailto:me at benrimmington.com>> wrote:
> I assumed that Swift 3 mode would be the default, so that existing `#!/usr/bin/swift` scripts continue to work.
> -- Ben
> > On 3 Jun 2017, at 23:47, Jens Persson <jens at bitcycle.com <mailto:jens at bitcycle.com>> wrote:
> > Yes of course, try my demonstration code yourself.
> > (In the current dev snapshots, -swift-version 4 is the default and -swift-version 3 is what you need to set if you want 3 compability)
> >> On Sun, Jun 4, 2017 at 12:37 AM, Ben Rimmington <me at benrimmington.com <mailto:me at benrimmington.com>> wrote:
> >> Are you using the Swift 4 language mode?
> >> <https://swift.org/blog/swift-4-0-release-process/#source-compatibility <https://swift.org/blog/swift-4-0-release-process/#source-compatibility>>
> >> -- Ben
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