Mark S. Miller <mailto:[email protected]>
September 26, 2013 7:45 PM
On Thu, Sep 26, 2013 at 7:12 PM, Brendan Eich <[email protected]
<mailto:[email protected]>> wrote:
Kevin Smith <mailto:[email protected]
<mailto:[email protected]>>
- 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.
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?
/be
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