- Libraries - Haskell.org

Re: Add Data.Sequence.toList
by Brandon Chinn 08 Mar '26

08 Mar '26

My concern here isn't efficiency. Data.Sequence.toList should just be a reexport of Foldable.toList monomorphized to Seq. I just want a consistent API with other modules in containers. I do see that Map.toList /= Foldable.toList. But Set.toList == Foldable.toList, and it's not obvious to me why Set should have toList and not Seq. On Sat, Mar 7, 2026, 3:37 PM Dan Dart <haskellcafe(a)dandart.co.uk> wrote: > Well, it's got a Foldable instance already, which gives you a toList for > anything Foldable, is it going to get any more efficient than this one? > That's one of the few reasons to add extra functions already covered by > type class instances, no? > > Cheers > > On Sat, 7 Mar 2026, 23:20 , <brandonchinn178(a)gmail.com> wrote: > >> An issue was opened on containers back in 2020 to add a monomorphic >> Data.Sequence.toList function: >> https://github.com/haskell/containers/issues/744. It was suggested to >> ask via the libraries list, and the previous reporter preferred to close >> the issue instead of continuing the process. I'm opening it back up: >> https://github.com/haskell/containers/issues/1184. Same motivation as >> the original issue; specifically, I always workaround this with >> >> import Data.Foldable qualified as Seq (toList) >> import Data.Sequence (Seq) >> import Data.Sequence qualified as Seq >> >> It's odd that Data.Sequence doesn't provide toList when Map and Set do. >> Are there any objections to this? >> >> Best, >> Brandon Chinn >> _______________________________________________ >> Libraries mailing list -- libraries(a)haskell.org >> To unsubscribe send an email to libraries-leave(a)haskell.org >> >

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Add Data.Sequence.toList
by brandonchinn178＠gmail.com 07 Mar '26

07 Mar '26

An issue was opened on containers back in 2020 to add a monomorphic Data.Sequence.toList function: https://github.com/haskell/containers/issues/744. It was suggested to ask via the libraries list, and the previous reporter preferred to close the issue instead of continuing the process. I'm opening it back up: https://github.com/haskell/containers/issues/1184. Same motivation as the original issue; specifically, I always workaround this with import Data.Foldable qualified as Seq (toList) import Data.Sequence (Seq) import Data.Sequence qualified as Seq It's odd that Data.Sequence doesn't provide toList when Map and Set do. Are there any objections to this? Best, Brandon Chinn

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intending to take over timezone-series, timezone-olson-th
by Janus Troelsen 23 Feb '26

23 Feb '26

Hi, I've tried pinging Yitzchak Gale on Github regarding these libraries, which have been removed from Stackage. I am using them and I'd like to make them compatible with the latest dependencies. So according to the protocol from the Haskell Wiki, I am hereby announcing that I will take over the packages in 6 weeks. Regards, Janus

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Takeover of AvlTree and COrdering
by Andrew Lelechenko 22 Aug '25

22 Aug '25

I’d like to take over Hackage packages https://hackage.haskell.org/package/COrdering and https://hackage.haskell.org/package/AvlTree. Last uploads were in 2008. Both packages fail to compile with modern GHCs; my intention is to bring them back to life. There are no maintainer contacts and no source code repository linked, so I cannot reach out to the maintainer to offer my services. Best regards, Andrew

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ANN: unzip-traversable-0.1
by David Feuer 01 Jul '25

01 Jul '25

I finally got around to cleaning up and releasing a package implementing both lazy and strict unzipping functions for arbitrary Traversable containers, with special attention to avoiding space leaks in the lazy case. I hope some folks find it useful! https://hackage.haskell.org/package/unzip-traversable David Feuer

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(No Subject)
by phdreamio 18 Jun '25

18 Jun '25

subscribe listserv Chen Yi

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by phdreamio 18 Jun '25

18 Jun '25

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Taking over mainteneance of insert-orderer-containers
by Erik de Castro Lopo 08 May '25

08 May '25

Hi, I would like to take over the mainteneance of insert-orderer-containers. I offered to take this over on a GH issue 3 weeks ago but have not recieved as response: https://github.com/phadej/insert-ordered-containers/issues/60#issuecomment-… https://github.com/phadej/insert-ordered-containers/issues/65#issuecomment-… My GH id is erikd and my Hackage id is ErikDeCastroLopo. I am hoping to get the GH repo transferred to me, but I can fork it if Oleg does not respnd. Thanks, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

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by phdreamio 24 Mar '25

24 Mar '25

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