On Tue, Jun 9, 2015 at 9:29 AM, C. Scott Ananian <ecmascr...@cscott.net> wrote:
> 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: > http://computer-programming-forum.com/3-smalltalk/fbb2ef6357ba0905.htm > --scott > -- Cheers, --MarkM
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