On 2 Sep 2015, at 10:31 AM, Fritz Anderson <[email protected]> wrote:
>
> In the sense of implementing all the required methods of <NSWindowDelegate>,
> NSWindowController vacuously complies: None of the delegate protocol methods
> are required, so every class meets the requirements. Back in the days when
> protocol compliance was strictly a matter of duck typing, that was enough.
Sorry, I was thinking of informal protocols, declared as categories on
NSObject. I don’t know whether <NSWindowDelegate> started life as informal.
— F
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