The sentinel cannot carry a return value, from the notes:
DH: Mark's proposal is broken, because it doesn't work with return
values of generators.
MM: Agreed.
In the TC39 meeting notes, Mark suggested something similar (but more
sophisticated) which was rejected and I am wondering why.
Herman's protocol is (roughly):
- Values v: { value: v }
- After last value: { done: true }
With a sentinel value, this would look like:
- Values v: v
- After last value: SENTINEL_VALUE (defined once, somewhere)
The latter seems simpler to me -- what's wrong with it?
Thanks!
Axel
--
Dr. Axel Rauschmayer
axel at rauschma.de <https://mail.mozilla.org/listinfo/es-discuss>
home: rauschma.de
twitter: twitter.com/rauschma
blog: 2ality.com
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