Re: Add DList to base

Yeah, those are in lens, so I am less concerned that they don't appear in base. Specifically, if DList were not to exist in base, and I use the typeclasses that we all know as well as lens, what am I missing out on? On Fri, Jun 9, 2017 at 10:30 AM, Ivan Lazar Miljenovic < ivan.miljenovic@gmail.com> wrote:

On 9 June 2017 at 09:41, Tony Morris wrote:

...

Are there any DList specific functions, that are not provided by existing type-classes (such as Foldable), that are typically used? I can think of a few, but they are all in lens.

singleton, cons, snoc

Though if you have singleton (which can be obtained from either Endo or GHC.Ext.IsList.fromList and `(:[])`; alternatively you could use pure/return but that is less pleasant IMO than the singleton function for code legibility purposes) and mappend you can do cons and snoc.

...

On Tue, Jun 6, 2017 at 4:24 PM, Henning Thielemann wrote:

...

On Mon, 5 Jun 2017, David Feuer wrote:

...

DList x just doesn't have much more to offer than Endo [x]. We already have Endo; ergo, we don't need DList.

I admit that I already used Endo as a quickly available DList

replacement.

...

...

_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

_______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com http://IvanMiljenovic.wordpress.com