Re: Generics!

On Wed, 10 Jun 2015 03:27:36 -0700, Greg Parker said:

>The canonical example is +[NSApplication sharedApplication]. Returning
>NSApplication means you always have to cast to your real NSApplication
>subclass, which is little more than syntactic noise. Returning id means
>you don't need the cast, but it also means you get no type checking and
>too many code completion results. Returning __kindof NSApplication is a
>good compromise.

Interesting example. My app has dozens of new warnings in Xcode 7 due to the above. Hopefully this is not yet working as intended. Consider:

clang -Weverything -fsyntax-only ~/test.m

--------------
#import <AppKit/AppKit.h>

int main(void)
{
(void)[NSApp delegate];
return 0;
}
--------------

it gives:

/Users/sean/test.m:5:8: warning: multiple methods named 'delegate' found [-Wstrict-selector-match]
(void)[NSApp delegate];
^~~~~~~~~~~~~~~~

Same if you use "[NSApplication sharedApplication]" instead of "NSApp".

(See rdar://21306753 which is really just rdar://6845498 still unfixed.)

Cheers,

--
____________________________________________________________
Sean McBride, B. Eng sean@rogue-research.com
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada

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