On Jul 24, 2010, at 11:30 PM, Mark S. Miller wrote:
> From: Brendan Eich <[email protected]>
> I see three tenable alternatives:
>
> A. Remove ASI in some opt-in version, in full -- no error correction, no
> restricted productions.
>
> This seems best to me. I would have no objection to keeping the second bullet
> of ASI rule #1. I may even advocate keeping it; I'm not sure yet. However,
> the first bullet of rule #1 is a terrible hazard.
Can you say more? It's hazardous because "X, Y, and Z" -- three concrete
examples.
The hazard I see, which Garrett Smith mailed me about just now, is the one I
already identified as "the mistaken expectation of ASI" -- the case where
there's no syntax error for ASI to correct:
var MyWidget = function(){
this.name = "mike";
}
/**
* Initialize Widget
*/
(function() {
/*...*/
});
(from http://jibbering.com/faq/notes/code-guidelines/asi.html).
This is simply a failure to use a semicolon where it is needed.
Removing ASI won't make this hazard go away unless (eventually, and in
statistically significant numbers) developers stop "counting" on such magical
"DWIM" ASI, and become more careful. But that is farfetched, since it's pretty
easy to make this mistake even if one assiduously inserts semicolons manually.
> Yes! Data! Bring it on!
That's your job :-P. I don't have access to the Google copy of the web, or
sawzall.
/be
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