[swift-evolution] Proposal Idea : Library (third party) Importable Checking
jgroff at apple.com
Fri Jan 15 13:46:16 CST 2016
> On Jan 14, 2016, at 11:17 PM, Félix Cloutier <felixcca at yahoo.ca> wrote:
> If it's meant to be included in a library, don't we need a linkage mechanism that will expose these symbols only if another library is linked in?
I see, that's the part I missed. If you wanted these symbols to be conditionally available, that would indeed require a new language, and probably dynamic linker, feature. You could however manage this without any new features, by adding the extensions in a third library dependent on the two base libraries.
>> Le 15 janv. 2016 à 01:43:16, Jo Albright via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> a écrit :
>>> Interesting idea. Unless I'm misunderstanding something, it seems to me you could kill both birds with one stone. If we add an 'importable' predicate to the '#if' language, then you can already use that to conditionalize the import:
>>> #if importable(ThirdPartyLibrary)
>>> import ThirdPartyLibrary
>>> /* decls that depend on library */
>> I am totally on board with that idea… since you could declare a type outside of the “#if importable” scope and add an extension inside the scope.
>> Designer . Developer . Nerd
>> Jo Albright
>> swift-evolution mailing list
>> swift-evolution at swift.org <mailto:swift-evolution at swift.org>
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the swift-evolution