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Logs: liberachat/#haskell

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2021-07-09 15:09:06 × chris-the-slurpa quits (~chris@81.96.113.213) (Remote host closed the connection)
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2021-07-09 15:13:15 <qrpnxz> interesting, i will check it out today
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2021-07-09 15:17:20 <safinaskar> thanks! :)
2021-07-09 15:19:15 leeb joins (~leeb@KD111239157039.au-net.ne.jp)
2021-07-09 15:20:48 <azeem> tomsmeding: You can get a lot of examples by consider matrices with coefficients in some ring and I think even a semiring. You can consider the ring of Integers modulo n and even of polynomials in some number of variables.
2021-07-09 15:21:20 <azeem> They will be non-commutative but associative.
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2021-07-09 15:51:32 <Martinsos> I published my very first package on Hackage -> strongly typed paths, similar like 'path' which was big inspiration but I try to take it one level further: https://hackage.haskell.org/package/strong-path . Any comments on code / API are very welcome, as I still consider myself to be intermediate in Haskell!
2021-07-09 15:51:41 sqrt2 joins (~ben@tunnel330957-pt.tunnel.tserv6.fra1.ipv6.he.net)
2021-07-09 15:52:14 <maerwald> Martinsos: I posted my comment on reddig already :p
2021-07-09 15:52:17 <maerwald> *reddit
2021-07-09 15:52:50 <Martinsos> maerwald ah that is you thanks for that :D! I thought it might be worth putting it here also, I don't know how much people from IRC are also on reddit
2021-07-09 15:53:10 <maerwald> Also, if you're using FilePath under the hood, then that would be my other critique
2021-07-09 15:53:17 <jle`> nice Martinsos !
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2021-07-09 15:55:43 <Martinsos> I am using Path under the hood actually, which uses FilePath :). Makes sense, but we can change that implementation in the future with no / little effect on the API I believe.
2021-07-09 15:55:57 <maerwald> if I ever get AFPP done, yeah
2021-07-09 15:56:22 <maerwald> Martinsos: https://github.com/hasufell/abstract-filepath
2021-07-09 15:56:27 <Martinsos> Just read about AFPP, that would be cool!
2021-07-09 15:57:11 <maerwald> I have green light from the CLC to attempt a user space implementation and start writing patches for e.g. filpath/unix/Win32, but it's gonna be a lot of wor
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2021-07-09 15:59:47 <Martinsos> It does look like a lot of work. I never got much into the lower-level details regarding the representation of path, normalization and similar, I leveraged Path for that, but I do hope to get some more time in the future to investigate that and to follow projects like AFPP
2021-07-09 16:00:30 merijn joins (~merijn@83-160-49-249.ip.xs4all.nl)
2021-07-09 16:02:01 <Martinsos> Maybe stupid question but I see that you have AbstractFilePath and WindowsFilePath exported from the top module, however there is no PosixFilePath -> how is that? You do have PosixString though hm
2021-07-09 16:03:24 lbseale joins (~lbseale@user/ep1ctetus)
2021-07-09 16:05:13 <maerwald> those are the same
2021-07-09 16:05:18 <maerwald> https://github.com/hasufell/abstract-filepath/blob/master/lib/AbstractFilePath/Internal/Types.hs#L37
2021-07-09 16:05:37 <maerwald> the String vs FilePath was a major question that made me stop working
2021-07-09 16:05:56 <maerwald> rust also makes that distinction
2021-07-09 16:06:05 <maerwald> although those are the same representation afair
2021-07-09 16:07:42 rednaZ[m] joins (~r3dnazmat@2001:470:69fc:105::ba70)
2021-07-09 16:08:53 <maerwald> Martinsos: https://paste.tomsmeding.com/1nCW1bVt
2021-07-09 16:09:00 yauhsien joins (~yauhsien@61-231-39-135.dynamic-ip.hinet.net)
2021-07-09 16:09:29 <albet70> does typeclass could be a type of another typeclass?
2021-07-09 16:09:38 <albet70> I don't know how to describe
2021-07-09 16:10:02 <albet70> typeclass has types, could typeclass has typeclass?
2021-07-09 16:10:59 × acidjnk_new quits (~acidjnk@p200300d0c72b9550509afe7c5cdd8ef5.dip0.t-ipconnect.de) (Ping timeout: 255 seconds)
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2021-07-09 16:11:03 <albet70> in Java, abstract class could extend interface, could typeclass extend typeclass?
2021-07-09 16:14:07 <boxscape> albet70: we do have a thing called "super class", you can put constraints in the definition of a type class, e.g. `class Eq a => Ord a where ...`
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2021-07-09 16:14:44 <boxscape> not sure how close that comes to what you're thinking of
2021-07-09 16:14:58 <Martinsos> maerwald: ahh that is tricky, haven't considered that. Somehow thought that filepath functions should work only with filepaths :D! The problem is that for this proposal to make sense you need to support everything that was supported so far? I don't have complete understanding of the problem, but the approach where there is a more general concept then, OSString (or maybe it is just Path? Is that also too specific?), and then there is
2021-07-09 16:15:10 <Martinsos> Upff just lost second part of the message
2021-07-09 16:16:07 <Martinsos> Anyway FilePath being newtype for OsString, like Rust does, makes some sense. Although I don't at first undresatnd fromt he name what OSString stands for. I would that this more general than FilePath is just Path. OSString is even more general? What could that be?
2021-07-09 16:16:25 safinaskar parts (~user@109.252.90.89) ()
2021-07-09 16:16:49 <maerwald> Martinsos: it's very simple... it's the encoding that the syscalls expect
2021-07-09 16:16:53 <maerwald> in a way
2021-07-09 16:17:09 <maerwald> so on windows it's UTF-16 (at least for Win32) and on unix it's just char[]
2021-07-09 16:17:17 <Martinsos> aha, so this is all about the encoding.
2021-07-09 16:17:21 <maerwald> yes
2021-07-09 16:17:29 <maerwald> rust uses WTF-8 though on windows, a custom encoding
2021-07-09 16:17:36 econo joins (uid147250@user/econo)
2021-07-09 16:17:48 <maerwald> internally
2021-07-09 16:17:55 <maerwald> but once passed to syscalls it's UTF-16
2021-07-09 16:18:24 <albet70> boxscape how you describe the relation between typeclass and type
2021-07-09 16:18:50 <Martinsos> Got it. Wish I could comment something more useful right now, but from my limited knowledge of the domain: sounds tricky all together :D / I am always in for keeping the types true to their name / approach 2 sounds reasonable
2021-07-09 16:18:55 <maerwald> but it's not only filepaths that are UTF-16
2021-07-09 16:19:15 <boxscape> albet70: which typeclass and which type?
2021-07-09 16:19:35 Obo joins (~roberto@70.pool90-171-81.dynamic.orange.es)
2021-07-09 16:20:10 <Martinsos> approach #3 surely not
2021-07-09 16:20:15 <albet70> Semigroup and Monad
2021-07-09 16:20:50 <albet70> Maybe and Monad
2021-07-09 16:20:50 <boxscape> albet70: if you mean Semigroup and Monoid, Semigroup is a superclass of Monoid
2021-07-09 16:21:00 <boxscape> Maybe is an instance of Monad
2021-07-09 16:21:07 <albet70> yes
2021-07-09 16:21:17 <boxscape> (Semigroup and Monad (as opposed to Monoid) are unrelated)
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