[swift-evolution] [Proposal] Swift 2.2: #if swift language version

[David Owens II]

I could (assuming I’m the David you’re referring to), though it will probably be towards the end of the week or early next week before I get a chance to get to it.

-David

> On Jan 4, 2016, at 1:03 PM, Drew Crawford <drew at sealedabstract.com> wrote:
> 
> The swift package manager is currently considering its own define <https://github.com/apple/swift-package-manager/pull/105#issuecomment-168754567>, so it's now the second official project that could benefit from this syntax.
> 
> David, any interest in writing this up?
> 
>> On Jan 3, 2016, at 4:48 AM, Goffredo Marocchi <panajev at gmail.com <mailto:panajev at gmail.com>> wrote:
>> 
>> +1 from me as well, supporting conditional compilation when the two versions of foundation differ and may differ for the foreseeable future seems a must on this end.
>> 
>> Sent from my iPhone
>> 
>> On 3 Jan 2016, at 10:12, Drew Crawford via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> 
>>>> If we are going to support something like this, I’d rather see it be something everyone could leverage as there are many use cases for this feature:
>>>> 
>>>> #if available("package-name", "1.2.*")
>>>> #endif
>>> 
>>> Big +1.
>>> 
>>> I've asked specifically to get some kind of conditional compilation on corelibs-foundation <https://lists.swift.org/pipermail/swift-corelibs-dev/Week-of-Mon-20151228/000287.html> being used.  corelibs-founcation is currently incompatible with Darwin Foundation, and so it is impractical to make a single codebase build for both.
>>> 
>>> But building the same application against both Foundations and spotting differences is one of the important ways we're going to spot bugs.
>>> 
>>> So I think the code quality of Foundation ultimately hinges on getting some feature like this in the language.
>>> 
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