Comments on Sept Meeting Notes

Mark S. Miller erights at google.com
Thu Sep 26 19:55:52 PDT 2013


On Thu, Sep 26, 2013 at 7:50 PM, Brendan Eich <brendan at mozilla.com> wrote:

> Mark S. Miller <mailto:erights at google.com>
>> September 26, 2013 7:45 PM
>>
>>
>> On Thu, Sep 26, 2013 at 7:12 PM, Brendan Eich <brendan at mozilla.com<mailto:
>> brendan at mozilla.com>> wrote:
>>
>>         Kevin Smith <mailto:zenparsing at gmail.com
>>         <mailto:zenparsing at gmail.com>>
>>
>>
>>         - Duck typing *must* work across Realms.  Symbols without a
>>         registry do not.  You can make special cases for built-in
>>         symbols, but special cases make bad law.
>>
>>
>>     (You learned from me.)
>>
>>     I agree world-of-realms matters, in many ways. We can solve this
>>     more generally, and should. I don't know the timing, but the idea
>>     that cross-realm local issues stop global progress via symbols is
>>     a bad trade in general. Must avoid getting stuck at local maximum.
>>
>>
>> In the same spirit of brevity, you have this backwards. Local hill
>> climbing with no lookahead is how to get stuck at a local maximum.
>>
>
> That's what I wrote!
>
> We need a world-of-realms spec. If we have one, probably many problems
> become easy to solve. If we don't, then arguments against symbols in
> particular and any world-wide values (value objects) that lack lookahead
> prevail.


Sorry, I misunderstood. In any case, yes.



>
>
>  The lookahead needed here is not agreement on a registry, but at least a
>> straw registry whose implications we understand. Perhaps we have one, which
>> is fine. We should examine it as part of this discussion of Symbols.
>>
>
> Why do you assume a mutable, racy registry?


Care to propose a better registry?

(I agree that we should disqualify any registry that is also a global
communications channel.)



>
>
> /be
>



-- 
    Cheers,
    --MarkM
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