[swift-evolution] Pitch: really_is and really_as operators

[Xiaodi Wu]

On Wed, Aug 24, 2016 at 9:58 PM, Charles Srstka <cocoadev at charlessoft.com>
wrote:

> On Aug 24, 2016, at 9:51 PM, Xiaodi Wu <xiaodi.wu at gmail.com> wrote:
>
> On Wed, Aug 24, 2016 at 9:47 PM, Xiaodi Wu <xiaodi.wu at gmail.com> wrote:
>
>> Works on Linux :)
>>
>
> And besides, on any platform where `type(of: bar) != NSString`, why should
> you expect `bar really_is NSString == true`? Isn't bar *not really*
> NSString?
>
>
> Because the pitch was for a version of ‘is’ which lacks the Objective-C
> bridging. The ‘is’ keyword matches subclasses of the type you specify as
> well as the type itself.
>

Sorry, I corrected myself :) I neglected the part where you mentioned that
__NSCFString is a subclass of NSString (which I forgot was the case). But
as you can see, `type(of: bar) is NSString.Type` works just fine :)



> Charles
>
>
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