brendan at mozilla.com
Wed Feb 6 14:09:40 PST 2013
Oliver Hunt wrote:
> On Feb 5, 2013, at 11:00 PM, Brendan Eich<brendan at mozilla.com> wrote:
>> Sorry if I was a thread-killer, posting four times in a row.
>> On balance we have:
>> prefix-? pros:
>> * LR(1) grammar without ambiguity or lookahead restriction.
> What's the production that takes this out of LL(1)?
Nothing -- I cited LR(1) because that's the formalism the ECMA-262 spec
uses, validated way back in ES3, supposed to be validated again for ES6.
>> prefix-? cons:
>> * ASI hazard if ? starts an intended destructuring assignment expression.
> That's interestingly icky.
>> suffix-? pros:
>> * Matches CoffeeScript
> I don't really consider that a pro, any more than matching any other language. This obsession with coffee script comparisons isn't useful.
Now now. An unweighted dump of pros and cons with one CoffeeScript
reference does not make an "obsession". I don't actually think this
matters, since we have gone *against* CoffeeScript with for-of. So,
obsess yourself :-P.
> I think prefix ? is easier from a reading point of view, but I'm not really married to either.
Agreed, and I posted mainly to try to get to consensus. Prefix-? looks
like it is in the lead.
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