Mark S. Miller erights at
Tue Jun 9 16:38:54 UTC 2015

On Tue, Jun 9, 2015 at 9:29 AM, C. Scott Ananian <ecmascript at>

> Mark: The `prfun` library in fact uses `Promise#timeout(n)` instead of a
> `TimeoutPromise` subclass.  But this is really a language-design question.
> You might as well ask why we have `WeakMap()` as a constructor instead of
> using `Map#weak()` or `weakmapify(map)`.  The fundamental reason is "so you
> can name (and thus test) the type of the object".

Do you ever test that the object returned by `Promise#timeout(n)` is
something other than a plain promise?

> But this is really a question for the smalltalk folks.  All I know is from
> googling "smalltalk species", for example:
>   --scott

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