[Haskell-cafe] What is the most modern associative list in types?

Serguey Zefirov sergueyz at gmail.com
Wed Jul 24 14:04:53 UTC 2019

Yes, it is extremely useful, thank you very much!

вт, 23 июл. 2019 г. в 19:51, Artem Pelenitsyn <a.pelenitsyn at gmail.com>:

> Hello Serguey,
> I think a very similar task was tackled by Richard Eisenberg in his Stitch
> manuscript (from 2018) by simple vectors (i.e length-indexed lists):
> checkout Section 6 of
> https://cs.brynmawr.edu/~rae/papers/2018/stitch/stitch.pdf, and the Ctx
> type in particular.
> They use De Bruijn, so your assoc lists end up just vectors. Otherwise, it
> would be the same HList, essentially. So maybe this answer is not
> enlightening, but maybe you find the paper useful, at least.
> --
> Kind regards,
> Artem Pelenitsyn
> On Tue, 23 Jul 2019 at 05:45, Serguey Zefirov <sergueyz at gmail.com> wrote:
>> Hello cafe.
>> I am trying to express some environment in types to constrain program
>> behavour. For this I need associative list of types, something along the
>> lines of [(Symbol, *)] so that I can lookup on "variable" name and get type
>> associated with it.
>> I looked into HList library but it does not provide one most generally
>> useful way (albeit there are dozen or so of ways in there).
>> So where can I get most modern HList-like library? Or what should I read
>> to get most modern HList myself?
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