Sorry that I sent this before the main observation.
Considering the implications of this, should Xcode's compiler flag these
"unbreak-ed case statements" with a warning? Currently, it doesn't do that.
Is there any reasonable case where you'd want a case condition to not have a
break statement after it?
Thanks,
Alex Zavatone
On Apr 9, 2015, at 4:53 PM, Alex Zavatone wrote:
> I'm looking through the new code that I've inherited and getting to know and
> love it and I'm running across a few new circumstances I've never seen before.
>
> With that said, I just noticed a switch statement with empty case conditions
> where the variable being checked will be 0, and the execution point/program
> counter hits both the case statement for 0 and for 1.
>
> It looks something like this:
>
> switch (myObject.myInt) {
>
> case 0:
> {
> // There is no code at all within these parens. This is empty.
> }
>
> case 1:
> {
> // Important stuff happens here
> }
> break;
>
> case 2:
> {
> // More important stuff happens here
> }
> break;
>
> default:
> break;
> }
>
> I was really surprised as all our code within case 1 was getting executed
> when myInt == 0 and when myInt == 1. Then I noticed that case:0 was put in
> for a placeholder condition. Since it was entered as a placeholder, it was
> entered without a break statement after it. In the case of myInt == 0, the
> program execution just continued down into the case of 1 code block and
> happily executed it.
>
> Who says learning new code isn't fun?
>
> Cheers,
> Alex
>
>
>
>
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