Re: Re: GOTO and/or BREAK LABEL

From: Date: Tue, 07 Mar 2006 18:48:00 +0000
Subject: Re: Re: GOTO and/or BREAK LABEL
References: 1 2  Groups: php.internals 
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 label_a:
   $i=0;
 label_b:
   $i++;
   while($i<10) {

     if(foo()) continue label_b;
     else {
       if(bar($i++)) goto label_a;
     }

   }

And that would be a parse error.


break/continue label only works when the label IMMEDIATELY preceeds the loop construct thus saying "I identify this loop at label_foo".

Here's another reason for break being distinct from goto:

foo:
foreach($arr as $val) {
 if (cond1) break foo; /* Leave the loop entirely */
 if (cond2) continue foo; /* Jump to next itteration in loop */
 if (cond3) goto foo; /* Restart the loop from the beginning */
}

Each type of label-targeted statement does a different thing.  But if that is ((really)) is confusing then you're right, it's not a good thing.  break 1;/continue 1; would cover the first two conditions in that example just fine.  To me, I see more consistency in working on the foo loop with foo on all statements.

-Sara

Still +1 goto, +0 goto with labeled breaks.

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