With the new template feature, I can now write code like this:
NSArray<NSString*>* a = [NSArray arrayWithObjects:@1, [NSDate date], nil]; NSLog(@"%@", a);
Now the question for me is that it seems the <template> syntax is only about annotation. The compiler does not even issue a warning about the above code; neither does the runtime crash on the NSLog line. That's quite confusing.
I could not find this new syntax in the official "Programming With Objective-C" book. Can someone direct me to some useful resources? Thanks.
Now the question for me is that it seems the … syntax is only about annotation.
Correct. Objective-C retains its dynamic nature at runtime; this syntax can help with compile-time error checking, and definitely helps with Swift integration, but it does not make Objective-C a statically typed language.
Anyway, the droid you’re looking for here is “lightweight generics”. If you search the ’net for that term, you’ll find lots of info about it.
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