[swift-evolution] [Draft] Adding a Build Configuration Import Test

[Pierre Monod-Broca]

My guess is most often one will want to import exactly what one is testing (Brent example) but I guess it would be very handy to do something like

#if canImport(Foo)
    import Foo.Bar as FooBar
#endif

In this case both form would be relevant.

Also +1 on Haraviks point:
> My only question is whether there should be a way to test minimum module versions? If I add support for a module but target a particularly recent version then that support won’t compile for platforms with older versions of the same module, so I should be able to prevent them from being a match.



Pierre

> Le 23 mars 2016 à 05:28, Erica Sadun via swift-evolution <swift-evolution at swift.org> a écrit :
> 
> I'm preparing a separate platform proposal. I want to make clear that the intent is to use the 
> framework being tested. However, the test that does the import may be separated from the code
> that uses the framework, which is why the call does not import.
> 
> -- E
> 
> 
>>> On Mar 22, 2016, at 10:24 PM, Brent Royal-Gordon <brent at architechies.com> wrote:
>>> 
>>> #if canImport(UIKit)
>>>  // UIKit-based code
>>>  #elseif canImport(Cocoa)
>>>  // OSX code
>>>  #elseif
>>>  // Workaround/text, whatever
>>> #endif
>> 
>> My question is simple: Are there cases where you want to test if you can import something, but you don't want to *actually* import it? If not, should we perhaps just do this?
>> 
>>    #if import UIKit
>>        // UIKit-based code, has UIKit available
>>    #elseif import Cocoa
>>        // OS X code, has Cocoa available
>>    #else
>>        // Fallback
>>    #endif
>> 
>> -- 
>> Brent Royal-Gordon
>> Architechies
> 
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