The Paradox of Partial Parametricity
Tab Atkins Jr.
jackalmage at gmail.com
Thu May 23 10:38:56 PDT 2013
On Wed, May 22, 2013 at 9:31 PM, Domenic Denicola
<domenic at domenicdenicola.com> wrote:
> From: Tab Atkins Jr. [mailto:jackalmage at gmail.com]
> Sounds like a great user-space library!!
You... you can't. You can't build .chain() on top of .then() in a way
that actually interoperates. You'll just get two different types of
promises which can't talk to each other.
You can do the opposite, interestingly, because .chain() doesn't lose
data, so a .then() method can be defined by the author to just do the
necessary chaining for you until it ends up with a plain value.
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