[m-users.] Efficient circular lists in pure Mercury?

[Bartosz Witkowski]

Hi Peter, Julian,

Just throwing it out there but I implemented a zipper data structure
in mercury some time ago if you're interested:
  https://gist.github.com/bartosz-witkowski/8154124

Kind Regards,
Bartosz Witkowski

On Tue, Jun 25, 2019 at 3:49 PM Peter Wang <novalazy at gmail.com> wrote:

> On Tue, 25 Jun 2019 00:28:59 -0500, jfondren at minimaltype.com wrote:
> >
> > 1. Do you recommend some other way to implement circular lists, or a
> > data structure suitable for this task?
>
> Hi,
>
> I think the standard solution would be a pair of lists. One list
> represents, in reverse, the elements before the "current" element.
> The other list represents the current and subsequent elements.
>
> https://en.wikipedia.org/wiki/Zipper_(data_structure)
>
> Peter
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