do-while grammar

André Bargull andre.bargull at
Tue Feb 8 12:12:00 PST 2011

Just for the record, here's a link to the bug report on bugzilla 
concerning ASI for do-while:

(Interesting that I came across the very same issue in January while 
working on the OpenLaszlo parser code :-)

> FWIW, JavaScriptCore provides automatic semicolon insertion after all 
> do-while statements in all contexts. We made this change for web 
> compatibility, mimicking a Firefox quirk.
> Geoff
> On Feb 8, 2011, at 11:53 AM, Dave Fugate wrote:
> Just to confirm, do-while iteration statements do in fact require a 
> semi-colon at the end as indicated in 12.6.1 of ES5, correct?  That 
> is, a production of the nature:
>                 do {;} while (false)*false*;
> would be invalid JavaScript as doesn't meet any of the three rules set 
> out in 7.9.1,  right?
> Thanks,
> Dave
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