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

[Goffredo Marocchi]

+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> 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 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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