Learned about a useful LLVM feature recently, which I tweeted about yesterday:
When trying this out for the first time in one of my projects it immediately warned me about a potential bug, where I forgot to call super.
Add the attribute annotation to the method declaration in your interfaces.
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When overwriting your important method in a subclass you will now be warned in case you forget to call super.
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Next time you compile you’ll be presented with the following:
This has been confirmed to be available as of Xcode 4.6.1