| 2021-03-31 00:00:16 +0200 | <mpickering> | zephyz: I think most people cross compile with haskell.nix |
| 2021-03-31 00:00:16 +0200 | <edwardk> | zephyz: (honestly i've never had to cross-compile with it, so in my case it that is an actual true statement, but sarcasm in, sarcasm out.) |
| 2021-03-31 00:00:18 +0200 | <mpickering> | have you tried that? |
| 2021-03-31 00:00:44 +0200 | <zephyz> | that would partially explain why every documentation I find is about bootstrapping GHC itself rather than explain the correct options |
| 2021-03-31 00:00:47 +0200 | borne | (~fritjof@200116b864cfc800f7ed9fd86a2491f0.dip.versatel-1u1.de) (Ping timeout: 250 seconds) |
| 2021-03-31 00:00:55 +0200 | <zephyz> | mpickering I'm not familiar with haskell.nix, what is it? |
| 2021-03-31 00:00:58 +0200 | ddellaco_ | (~ddellacos@ool-44c73afa.dyn.optonline.net) (Ping timeout: 240 seconds) |
| 2021-03-31 00:01:17 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 00:01:49 +0200 | <zephyz> | mpickering oh, is this what you're refering to? https://input-output-hk.github.io/haskell.nix/tutorials/cross-compilation/ |
| 2021-03-31 00:02:02 +0200 | <mpickering> | yeah |
| 2021-03-31 00:02:26 +0200 | <mpickering> | apparently it's quite easy. I know people who regularly compile binaries for rasp pi |
| 2021-03-31 00:02:53 +0200 | <zephyz> | fantastic, I'll give it a go! |
| 2021-03-31 00:03:08 +0200 | <zephyz> | thanks! |
| 2021-03-31 00:04:21 +0200 | Rudd0 | (~Rudd0@185.189.115.103) |
| 2021-03-31 00:05:02 +0200 | <tolt> | We use haskell.nix to compile for arm |
| 2021-03-31 00:05:13 +0200 | <tolt> | Works well for us, just takes a while |
| 2021-03-31 00:06:22 +0200 | Feuermagier_ | (~CatWithMo@gateway/tor-sasl/catwithmoustache) |
| 2021-03-31 00:06:47 +0200 | CatWithMoustache | (~CatWithMo@gateway/tor-sasl/catwithmoustache) (Remote host closed the connection) |
| 2021-03-31 00:07:44 +0200 | average | (uid473595@gateway/web/irccloud.com/x-mdzvkbciicshchec) |
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| 2021-03-31 00:19:48 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 00:20:00 +0200 | spidr | (~spider@2402:1f00:8100:400::6b1) (Quit: brb) |
| 2021-03-31 00:21:37 +0200 | Lowl3v3l | (~Lowl3v3l@dslb-002-207-103-026.002.207.pools.vodafone-ip.de) (Remote host closed the connection) |
| 2021-03-31 00:23:38 +0200 | yunusaydin | (4eb8266d@78.184.38.109) |
| 2021-03-31 00:26:43 +0200 | ddellaco_ | (~ddellacos@ool-44c73afa.dyn.optonline.net) |
| 2021-03-31 00:28:02 +0200 | xzs | (~xzc@ip68-14-50-158.ri.ri.cox.net) |
| 2021-03-31 00:28:08 +0200 | xzs | (~xzc@ip68-14-50-158.ri.ri.cox.net) () |
| 2021-03-31 00:29:45 +0200 | <dmj`> | zephyz: I've cross compiled Haskell to ARM using nix, it uses the LLVM backend. What tolt said. |
| 2021-03-31 00:30:40 +0200 | usr25 | (~usr25@unaffiliated/usr25) |
| 2021-03-31 00:31:29 +0200 | <dmj`> | zephyz: nix-repl> :b pkgsCross.aarch64-multiplatform.haskellPackages.hello |
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| 2021-03-31 02:11:31 +0200 | infinisi1 | infinisil |
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| 2021-03-31 02:26:31 +0200 | <koz_> | I have some trouble understanding the second and third case of this: https://hackage.haskell.org/package/extra-1.7.9/docs/src/Data.List.Extra.html#split |
| 2021-03-31 02:26:37 +0200 | Yumasi | (~guillaume@2a01:e0a:5cb:4430:6c9e:d835:53cb:dfd2) (Quit: WeeChat 2.8) |
| 2021-03-31 02:26:48 +0200 | <koz_> | What is this actually saying? |
| 2021-03-31 02:26:59 +0200 | star_cloud | (~star_clou@ec2-34-220-44-120.us-west-2.compute.amazonaws.com) |
| 2021-03-31 02:27:11 +0200 | jpp_ | (~jpp@47-220-44-237.htvlcmtk02.res.dyn.suddenlink.net) (Remote host closed the connection) |
| 2021-03-31 02:29:06 +0200 | Sgeo | (~Sgeo@ool-18b98aa4.dyn.optonline.net) |
| 2021-03-31 02:31:52 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 02:32:06 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 260 seconds) |
| 2021-03-31 02:32:25 +0200 | <infinisil> | koz_: These lines are using pattern guards |
| 2021-03-31 02:32:34 +0200 | Sgeo | (~Sgeo@ool-18b98aa4.dyn.optonline.net) (Client Quit) |
| 2021-03-31 02:32:37 +0200 | <int-e> | the second one is just a boolean guard |
| 2021-03-31 02:32:37 +0200 | lordyod | (~lordyod@c-67-169-144-132.hsd1.ca.comcast.net) |
| 2021-03-31 02:32:50 +0200 | <koz_> | What about the third? |
| 2021-03-31 02:33:06 +0200 | <monochrom> | if split f xs matches the pattern y:ys |
| 2021-03-31 02:33:15 +0200 | <koz_> | And what happens if not? |
| 2021-03-31 02:33:32 +0200 | <int-e> | koz_: then it falls through, but it cannot happen |
| 2021-03-31 02:33:40 +0200 | <int-e> | since split never returns an empty list |
| 2021-03-31 02:33:52 +0200 | <koz_> | GHC doesn't believe me though. |
| 2021-03-31 02:34:07 +0200 | <koz_> | I tried reimplementing this using constructs I understand, and GHC says I have an incomplete match. |
| 2021-03-31 02:34:09 +0200 | <int-e> | sure, that's not surprising. it's still true |
| 2021-03-31 02:34:53 +0200 | <monochrom> | Right, this is an external reasoning based on the base case producing a non-empty list so the recursion produces a non-empty list by induction. |
| 2021-03-31 02:35:26 +0200 | cole-h | (~cole-h@c-73-48-197-220.hsd1.ca.comcast.net) (Ping timeout: 260 seconds) |
| 2021-03-31 02:35:32 +0200 | <koz_> | So the honest type of split would be (a -> Bool) -> [a] -> NonEmpty [a] or so? |
| 2021-03-31 02:35:50 +0200 | <infinisil> | Yeah I think so |
| 2021-03-31 02:36:03 +0200 | <monochrom> | -fno-warn-obviously-total-functions |
| 2021-03-31 02:36:11 +0200 | usr25 | (~usr25@unaffiliated/usr25) (Quit: Leaving) |
| 2021-03-31 02:36:13 +0200 | <infinisil> | > words "" |
| 2021-03-31 02:36:14 +0200 | <lambdabot> | [] |
| 2021-03-31 02:36:21 +0200 | <infinisil> | The words function unfortunately doesn't work like that |
| 2021-03-31 02:36:42 +0200 | <koz_> | monochrom: Is that you being sarcastic or is that an actual option? :P |
| 2021-03-31 02:36:49 +0200 | <monochrom> | joke |
| 2021-03-31 02:37:00 +0200 | <koz_> | I figured, but had to be sure. |
| 2021-03-31 02:37:11 +0200 | Guest55480 | (~m0rphism@HSI-KBW-085-216-104-059.hsi.kabelbw.de) (Ping timeout: 268 seconds) |
| 2021-03-31 02:37:14 +0200 | <monochrom> | And satire on warnings of all sorts of non-problems |
| 2021-03-31 02:37:58 +0200 | <int-e> | Hmm not sure I'd call that unfortunate. `word` is lossy, but it's a feature. |
| 2021-03-31 02:38:03 +0200 | <infinisil> | koz_: I'd add a final pattern match returning `error "Can't happen"` |
| 2021-03-31 02:38:03 +0200 | <monochrom> | Seriously IMO a warning on "do { foo; bar ; zed }" is ridiculous. |
| 2021-03-31 02:38:23 +0200 | <infinisil> | monochrom: What's the warning/ |
| 2021-03-31 02:38:25 +0200 | <koz_> | infinisil: Lol, fair. |
| 2021-03-31 02:38:25 +0200 | <infinisil> | ? |
| 2021-03-31 02:38:26 +0200 | <monochrom> | i.e., a warning on using "foo" instead of "pat <- foo" |
| 2021-03-31 02:38:55 +0200 | <infinisil> | monochrom: Doesn't it only do that if pattern wouldn't be ()? |
| 2021-03-31 02:38:55 +0200 | <monochrom> | I forgot the exact option name because good riddance. |
| 2021-03-31 02:39:13 +0200 | <monochrom> | Oh here is what I think is hypocritic about that. |
| 2021-03-31 02:39:39 +0200 | geowiesnot | (~user@87-89-181-157.abo.bbox.fr) (Ping timeout: 268 seconds) |
| 2021-03-31 02:39:42 +0200 | <monochrom> | Suppose I have "data U = U". So it's should be of the same status as (), right? RIGHT? |
| 2021-03-31 02:40:08 +0200 | <monochrom> | So if foo :: IO U, I'm warned; if foo :: IO (), I'm not warned. |
| 2021-03-31 02:40:13 +0200 | <monochrom> | WHAT KIND OF LOGIC IS THAT |
| 2021-03-31 02:40:29 +0200 | <monochrom> | Answer: Hypocrisy. |
| 2021-03-31 02:41:37 +0200 | <int-e> | thought shalt have no other unit type before () |
| 2021-03-31 02:41:45 +0200 | <int-e> | thou |
| 2021-03-31 02:41:48 +0200 | <monochrom> | OK, this and other warnings are not in the default. They are "merely" in -Wall. |
| 2021-03-31 02:41:51 +0200 | <int-e> | stupid auto-correcting fingers |
| 2021-03-31 02:42:05 +0200 | <infinisil> | -Wall -Werror all the way |
| 2021-03-31 02:42:10 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) |
| 2021-03-31 02:42:33 +0200 | Sgeo | (~Sgeo@ool-18b98aa4.dyn.optonline.net) |
| 2021-03-31 02:42:53 +0200 | <infinisil> | I haven't tried out -Weverything but now I want to |
| 2021-03-31 02:42:59 +0200 | <monochrom> | So over the years I gathered that -Wall is full of these useless warnings. Or worse, halfly full of these useless warnings and so the value of -Wall is devalued. |
| 2021-03-31 02:43:21 +0200 | <monochrom> | This phenomenon is well-known as the cry-wolf fable. |
| 2021-03-31 02:43:45 +0200 | <infinisil> | I'm so far quite pleased by -Wall |
| 2021-03-31 02:44:00 +0200 | <monochrom> | It means that if -Wall cries wolf false alarm too many times, when one day it actually finds a real issue, you won't notice. |
| 2021-03-31 02:44:48 +0200 | <infinisil> | Honestly, I can't really relate |
| 2021-03-31 02:44:57 +0200 | <infinisil> | Maybe I'm not doing fancy enough things to trigger the false alarms |
| 2021-03-31 02:45:01 +0200 | <int-e> | monochrom: so to make warnings useful, you fix all the warnings that you don't disable, even if it makes the code less readable :-/ |
| 2021-03-31 02:45:13 +0200 | werneta | (~werneta@70-142-214-115.lightspeed.irvnca.sbcglobal.net) |
| 2021-03-31 02:45:17 +0200 | enya[m] | (enyaismatr@gateway/shell/matrix.org/x-wlpxchczeengvguo) |
| 2021-03-31 02:46:11 +0200 | andi- | (~andi-@NixOS/user/andi-) (Ping timeout: 248 seconds) |
| 2021-03-31 02:51:25 +0200 | obfusk | (~quassel@a82-161-150-56.adsl.xs4all.nl) |
| 2021-03-31 02:51:36 +0200 | <int-e> | infinisil: well that split code is an example of code that is correct, but in order to squelch the warning you either need to change the type (inducing conversions between NonEmpty [a] and [a] down the line) or add a useless line of code like | [] <- split f xs = error "impossible case" |
| 2021-03-31 02:52:03 +0200 | <int-e> | infinisil: and I don't think that particular code is fancy at all. |
| 2021-03-31 02:52:11 +0200 | <monochrom> | In the split case, NonEmpty is the way to go. |
| 2021-03-31 02:52:43 +0200 | <infinisil> | Hmm, though I'm with the compiler there. There's no way for it to infer that the function can't return an empty list |
| 2021-03-31 02:52:49 +0200 | <int-e> | I can't bring myself to like NonEmpty. |
| 2021-03-31 02:53:07 +0200 | <int-e> | infinisil: oh sure, I don't expect it to figure that one out either |
| 2021-03-31 02:53:40 +0200 | <monochrom> | In the absence of NonEmpty, I wouldn't mind adding a final clause "= error "should not happen"" either. At least it benefits human readers. |
| 2021-03-31 02:53:45 +0200 | <int-e> | and the particular warning... missing cases... tends to be useful, so I might actually add the useless case instead. |
| 2021-03-31 02:54:48 +0200 | <koz_> | I agree with the useless case. |
| 2021-03-31 02:54:59 +0200 | <koz_> | I'd rather not disable such a useful warning for a whole module cause of one function. |
| 2021-03-31 02:56:37 +0200 | gnumonic | (~gnumonic@c-73-170-91-210.hsd1.ca.comcast.net) |
| 2021-03-31 02:57:17 +0200 | <monochrom> | But I would do it for human readers, not for -Wall |
| 2021-03-31 02:58:19 +0200 | carlomagno | (~cararell@148.87.23.5) (Quit: Leaving.) |
| 2021-03-31 03:00:04 +0200 | obfusk | (~quassel@a82-161-150-56.adsl.xs4all.nl) (Quit: https://quassel-irc.org - Chat comfortably. Anywhere.) |
| 2021-03-31 03:00:53 +0200 | conal | (~conal@64.71.133.70) (Quit: Computer has gone to sleep.) |
| 2021-03-31 03:01:54 +0200 | andi- | (~andi-@NixOS/user/andi-) |
| 2021-03-31 03:03:01 +0200 | conal | (~conal@64.71.133.70) |
| 2021-03-31 03:05:39 +0200 | eldritch | (~eldritch@unaffiliated/eldritch) |
| 2021-03-31 03:06:02 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 252 seconds) |
| 2021-03-31 03:06:38 +0200 | <DigitalKiwi> | but would you do it for -Werror? |
| 2021-03-31 03:07:23 +0200 | <monochrom> | No |
| 2021-03-31 03:07:40 +0200 | kiweun | (~kiweun@2607:fea8:2a62:9600:8050:1fea:250d:e11e) |
| 2021-03-31 03:07:56 +0200 | <monochrom> | If Buddha is in my way, I kill Buddha. If -Werror is in my way, I kill -Werror. |
| 2021-03-31 03:08:04 +0200 | <DigitalKiwi> | ;( |
| 2021-03-31 03:08:52 +0200 | <monochrom> | But I would write a long comment to explain or remind the reader why there is a certain syntactic case doesn't need to be handled. |
| 2021-03-31 03:09:12 +0200 | <DigitalKiwi> | in soviet russia Buddha/-Werror kill you |
| 2021-03-31 03:09:52 +0200 | solvr | (57e3c46d@87.227.196.109) |
| 2021-03-31 03:09:53 +0200 | evanjs | (~evanjs@075-129-098-007.res.spectrum.com) (Read error: Connection reset by peer) |
| 2021-03-31 03:10:06 +0200 | <monochrom> | And if I'm willing to write that long comment, adding a short '= error "doesn't happen"' is no big deal. I can do that for the reader. |
| 2021-03-31 03:10:10 +0200 | Tario | (~Tario@201.192.165.173) (Remote host closed the connection) |
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| 2021-03-31 03:43:39 +0200 | <styledash> | l |
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| 2021-03-31 03:47:26 +0200 | Guest54397 | shapr |
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| 2021-03-31 06:20:49 +0200 | Nobita | (ca0e7816@202.14.120.22) |
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| 2021-03-31 06:23:38 +0200 | deviantfero | (~deviantfe@190.150.27.58) (Ping timeout: 260 seconds) |
| 2021-03-31 06:24:02 +0200 | <edwardk> | these linear logic proofs are making me go cross-eyed |
| 2021-03-31 06:24:58 +0200 | <edwardk> | https://github.com/ekmett/linear-logic/blob/main/src/Linear/Logic/Functor.hs#L1270 |
| 2021-03-31 06:27:38 +0200 | alx741 | (~alx741@181.196.68.106) (Quit: alx741) |
| 2021-03-31 06:30:24 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 06:30:30 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:cdc8:88ee:4ef9:ae5c) |
| 2021-03-31 06:33:27 +0200 | JanBessa1 | (~JanB@85-22-26-176.ip.dokom21.de) |
| 2021-03-31 06:33:37 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 06:35:27 +0200 | <glguy> | edwardk, how much of that is blindly following the types, and how much is creative? |
| 2021-03-31 06:35:51 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 268 seconds) |
| 2021-03-31 06:37:06 +0200 | JanBessai | (~JanB@85-22-13-230.ip.dokom21.de) (Ping timeout: 260 seconds) |
| 2021-03-31 06:37:30 +0200 | <edwardk> | it actually gets difficult at times, but a lot os blind type following |
| 2021-03-31 06:37:38 +0200 | <edwardk> | a little tactic engine would knock these out fast |
| 2021-03-31 06:38:02 +0200 | <nshepperd2> | is this coq but in haskell |
| 2021-03-31 06:40:06 +0200 | <edwardk> | nshepperd2: in https://github.com/ekmett/linear-logic/blob/main/src/Linear/Logic/Internal.hs#L54 i define a 'full' intuitionistic linear logic suite using the limited linear haskell a %1 -> b arrow as half of my arrow, and by attaching involutively the notion of what evidence it takes to refute a given proof. |
| 2021-03-31 06:40:31 +0200 | <edwardk> | then once i have that, and build with and par, which are the missing connectives, its off to the races. |
| 2021-03-31 06:41:05 +0200 | <edwardk> | then i wanted a place to put all my boilerplate proofs, so i started adding bifunctors, monoidal category structure, etc. |
| 2021-03-31 06:41:30 +0200 | <edwardk> | but once i had that it was somewhat disappointing that the proofs couldn't flow back into the arguments for bimap, etc. |
| 2021-03-31 06:41:45 +0200 | <edwardk> | because they were external to the logic program itself. |
| 2021-03-31 06:41:53 +0200 | <edwardk> | but i was able to internalize them too |
| 2021-03-31 06:42:10 +0200 | evanjs | (~evanjs@075-129-098-007.res.spectrum.com) (Read error: Connection reset by peer) |
| 2021-03-31 06:43:09 +0200 | <edwardk> | glguy: as for hard parts, i'd say it takes a good deal of creativity to figure out how to plumb apartness information around when you get more complicated proofs involving isos |
| 2021-03-31 06:43:25 +0200 | <edwardk> | using holes is critical to getting anything done |
| 2021-03-31 06:43:48 +0200 | <edwardk> | lenses/traversals are coming soon |
| 2021-03-31 06:43:50 +0200 | <edwardk> | =) |
| 2021-03-31 06:43:56 +0200 | evanjs | (~evanjs@075-129-098-007.res.spectrum.com) |
| 2021-03-31 06:44:24 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 06:46:04 +0200 | Wuzzy | (~Wuzzy@p57a2fb8a.dip0.t-ipconnect.de) (Remote host closed the connection) |
| 2021-03-31 06:46:47 +0200 | <edwardk> | the type of https://github.com/ekmett/linear-logic/blob/main/src/Linear/Logic/Functor.hs#L853 was what fmap' used to be, but that top level arrow wasn't contradictable. |
| 2021-03-31 06:47:50 +0200 | acidjnk_new | (~acidjnk@p200300d0c72b9549c1d5f2f7c60f6477.dip0.t-ipconnect.de) |
| 2021-03-31 06:48:38 +0200 | <edwardk> | glguy: i was particularly proud of figuring out a way to overload lollipops to work with actual function application, while still letting me work backwards through the refutations because refutations for lollipops and haskell functions are isomorphic, and the ones for unrestricted haskell functions can also fit in |
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| 2021-03-31 07:24:32 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 252 seconds) |
| 2021-03-31 07:25:22 +0200 | CatWithMoustache | (~CatWithMo@gateway/tor-sasl/catwithmoustache) |
| 2021-03-31 07:28:34 +0200 | ddellacosta | (~ddellacos@86.106.143.118) (Ping timeout: 252 seconds) |
| 2021-03-31 07:33:06 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 07:35:30 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 260 seconds) |
| 2021-03-31 07:36:38 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 07:37:23 +0200 | sord937 | (~sord937@gateway/tor-sasl/sord937) |
| 2021-03-31 07:38:21 +0200 | raym | (~ray@115.187.32.14) |
| 2021-03-31 07:38:21 +0200 | acidjnk_new | (~acidjnk@p200300d0c72b9549c1d5f2f7c60f6477.dip0.t-ipconnect.de) |
| 2021-03-31 07:40:37 +0200 | xff0x | (~xff0x@2001:1a81:52d9:7900:960c:6609:3a45:b460) (Ping timeout: 276 seconds) |
| 2021-03-31 07:41:08 +0200 | xff0x | (~xff0x@2001:1a81:52d9:7900:6b0c:e3df:c0c:8727) |
| 2021-03-31 07:45:00 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 07:47:31 +0200 | v01d4lph4 | (~v01d4lph4@223.190.20.92) |
| 2021-03-31 07:48:18 +0200 | v01d4lph4 | (~v01d4lph4@223.190.20.92) (Remote host closed the connection) |
| 2021-03-31 07:48:30 +0200 | v01d4lph4 | (~v01d4lph4@223.190.20.92) |
| 2021-03-31 07:49:29 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Ping timeout: 260 seconds) |
| 2021-03-31 07:57:40 +0200 | plutoniix | (~q@184.82.196.30) |
| 2021-03-31 07:57:51 +0200 | ddellacosta | (~ddellacos@86.106.143.27) |
| 2021-03-31 07:59:46 +0200 | Guest41032 | (~laudiacay@67.176.215.84) (Ping timeout: 240 seconds) |
| 2021-03-31 08:00:24 +0200 | cole-h | (~cole-h@c-73-48-197-220.hsd1.ca.comcast.net) |
| 2021-03-31 08:02:33 +0200 | ddellacosta | (~ddellacos@86.106.143.27) (Ping timeout: 260 seconds) |
| 2021-03-31 08:02:46 +0200 | Alleria_ | (~AllahuAkb@2603-7000-3040-0000-f003-eca1-8bf8-0ed7.res6.spectrum.com) (Read error: Connection reset by peer) |
| 2021-03-31 08:03:30 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 260 seconds) |
| 2021-03-31 08:05:44 +0200 | jakalx | (~jakalx@base.jakalx.net) |
| 2021-03-31 08:05:59 +0200 | <CatWithMoustache> | how do I use an element twice in a list comprehension? |
| 2021-03-31 08:06:09 +0200 | <CatWithMoustache> | so x : x : xs |
| 2021-03-31 08:06:46 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 240 seconds) |
| 2021-03-31 08:06:52 +0200 | Alleria_ | (~AllahuAkb@2603-7000-3040-0000-501f-0d46-1115-b500.res6.spectrum.com) |
| 2021-03-31 08:07:23 +0200 | malumore | (~malumore@151.62.117.70) |
| 2021-03-31 08:07:54 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 08:09:30 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 08:09:37 +0200 | <edwardk> | CatWithMoustache: not sure what you are asking. you want a pattern or a comprehension that returns one or what? |
| 2021-03-31 08:10:31 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 08:10:38 +0200 | <edwardk> | > let foo (x:y:zs) | x == y = "hit" | otherwise = "miss" in foo "oooh" |
| 2021-03-31 08:10:41 +0200 | <lambdabot> | "hit" |
| 2021-03-31 08:11:07 +0200 | <edwardk> | there's no syntax for a literal match with a previous variable per se. though you can use view patterns to fake it |
| 2021-03-31 08:12:38 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 240 seconds) |
| 2021-03-31 08:12:42 +0200 | <edwardk> | > let foo (x:((==) x -> True):zs) = "hit"; foo (x:y:zs) = "miss" in foo "oooh" |
| 2021-03-31 08:12:44 +0200 | <lambdabot> | "hit" |
| 2021-03-31 08:12:45 +0200 | CatWithMoustache | (~CatWithMo@gateway/tor-sasl/catwithmoustache) (Ping timeout: 240 seconds) |
| 2021-03-31 08:12:59 +0200 | <edwardk> | but for actual comprehensions you can use filter equations |
| 2021-03-31 08:13:08 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 08:13:57 +0200 | <edwardk> | > [ (x,y) | x <- [1..3], y <- [1..3] , x < y ] |
| 2021-03-31 08:13:59 +0200 | <lambdabot> | [(1,2),(1,3),(2,3)] |
| 2021-03-31 08:14:29 +0200 | <edwardk> | replacing < with == there might be what you asked for. but its hard to parse your meaning from that one line |
| 2021-03-31 08:14:59 +0200 | _ht | (~quassel@82-169-194-8.biz.kpn.net) |
| 2021-03-31 08:15:05 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 08:15:28 +0200 | Guest41032 | (~laudiacay@67.176.215.84) |
| 2021-03-31 08:15:39 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 08:17:33 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 08:18:29 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 08:18:52 +0200 | CatWithMoustache | (~CatWithMo@gateway/tor-sasl/catwithmoustache) |
| 2021-03-31 08:20:21 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 08:20:22 +0200 | unyu | (~pyon@unaffiliated/pyon) (Quit: brb) |
| 2021-03-31 08:20:29 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) |
| 2021-03-31 08:20:50 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 08:20:59 +0200 | takuan | (~takuan@178-116-218-225.access.telenet.be) |
| 2021-03-31 08:21:00 +0200 | stree | (~stree@68.36.8.116) (Ping timeout: 252 seconds) |
| 2021-03-31 08:23:22 +0200 | malumore | (~malumore@151.62.117.70) (Remote host closed the connection) |
| 2021-03-31 08:24:45 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 246 seconds) |
| 2021-03-31 08:25:21 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 08:28:01 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 08:30:46 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) |
| 2021-03-31 08:31:44 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 08:32:06 +0200 | Tario | (~Tario@201.192.165.173) (Ping timeout: 240 seconds) |
| 2021-03-31 08:32:40 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 08:32:53 +0200 | unyu | (~pyon@unaffiliated/pyon) |
| 2021-03-31 08:33:43 +0200 | stree | (~stree@68.36.8.116) |
| 2021-03-31 08:34:12 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 246 seconds) |
| 2021-03-31 08:36:03 +0200 | <Axman6> | CatWithMoustache: can you elaborate on what you want? we haven't been able to make sense of your question |
| 2021-03-31 08:36:06 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 260 seconds) |
| 2021-03-31 08:37:46 +0200 | machinedgod | (~machinedg@135-23-192-217.cpe.pppoe.ca) |
| 2021-03-31 08:37:57 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) (Ping timeout: 268 seconds) |
| 2021-03-31 08:39:05 +0200 | Lord_of_Life | (~Lord@unaffiliated/lord-of-life/x-0885362) |
| 2021-03-31 08:40:34 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 08:40:54 +0200 | Mrbuck | (~Mrbuck@gateway/tor-sasl/mrbuck) |
| 2021-03-31 08:41:05 +0200 | jakalx | (~jakalx@base.jakalx.net) ("Error from remote client") |
| 2021-03-31 08:43:36 +0200 | jakalx | (~jakalx@base.jakalx.net) |
| 2021-03-31 08:44:38 +0200 | quinn | (~quinn@c-73-223-224-163.hsd1.ca.comcast.net) (Quit: ZNC 1.8.1 - https://znc.in) |
| 2021-03-31 08:45:30 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 260 seconds) |
| 2021-03-31 08:48:10 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:cdc8:88ee:4ef9:ae5c) (Quit: My MacBook has gone to sleep. ZZZzzz…) |
| 2021-03-31 08:49:32 +0200 | tzh | (~tzh@c-24-21-73-154.hsd1.or.comcast.net) (Quit: zzz) |
| 2021-03-31 08:49:56 +0200 | quinn | (~quinn@c-73-223-224-163.hsd1.ca.comcast.net) |
| 2021-03-31 08:51:08 +0200 | <xsperry> | CatWithMoustache, something like this? |
| 2021-03-31 08:51:08 +0200 | <xsperry> | > [x : x : [] | x <- [1,2,3]] |
| 2021-03-31 08:51:10 +0200 | <lambdabot> | [[1,1],[2,2],[3,3]] |
| 2021-03-31 08:51:20 +0200 | <CatWithMoustache> | Axman6, I have a list comprehension, [x, x * 34 | x <- xs ] where I want to put x twice |
| 2021-03-31 08:51:38 +0200 | <CatWithMoustache> | flattened, so just an int list |
| 2021-03-31 08:52:11 +0200 | <Axman6> | > let xs = [1, 10, 100] in [ y | x <- xs, y <- [x, x*34]] |
| 2021-03-31 08:52:13 +0200 | <lambdabot> | [1,34,10,340,100,3400] |
| 2021-03-31 08:53:20 +0200 | <xsperry> | > concat [[x, x * 34] | x <- [1,2,3] ] |
| 2021-03-31 08:53:21 +0200 | <lambdabot> | [1,34,2,68,3,102] |
| 2021-03-31 08:53:31 +0200 | Jd007 | (~Jd007@162.156.11.151) (Quit: Jd007) |
| 2021-03-31 08:55:36 +0200 | <xsperry> | > concatMap (\x -> [x, x*34]) [1,2,3] |
| 2021-03-31 08:55:38 +0200 | <lambdabot> | [1,34,2,68,3,102] |
| 2021-03-31 08:56:15 +0200 | Gurkenglas | (~Gurkengla@unaffiliated/gurkenglas) |
| 2021-03-31 08:56:21 +0200 | andreas31 | (~andreas@gateway/tor-sasl/andreas303) (Ping timeout: 240 seconds) |
| 2021-03-31 08:56:46 +0200 | <Axman6> | so many different but requivalent implementations, it's almost like there's some pattern here... |
| 2021-03-31 08:57:15 +0200 | <Axman6> | > [1,10,100] >>= \x -> [x, x*34] |
| 2021-03-31 08:57:16 +0200 | Tario | (~Tario@201.192.165.173) |
| 2021-03-31 08:57:16 +0200 | <lambdabot> | [1,34,10,340,100,3400] |
| 2021-03-31 08:57:36 +0200 | coot | (~coot@37.30.55.131.nat.umts.dynamic.t-mobile.pl) |
| 2021-03-31 08:58:45 +0200 | <[exa]> | > (*) <$> [1,10,100] <*> [1,34] |
| 2021-03-31 08:58:48 +0200 | <lambdabot> | [1,34,10,340,100,3400] |
| 2021-03-31 09:00:20 +0200 | pavonia | (~user@unaffiliated/siracusa) (Quit: Bye!) |
| 2021-03-31 09:00:26 +0200 | Franciman | (~francesco@host-79-53-62-46.retail.telecomitalia.it) |
| 2021-03-31 09:01:50 +0200 | rmk236 | (~lcampos@ip-37-201-211-26.hsi13.unitymediagroup.de) |
| 2021-03-31 09:02:40 +0200 | Sgeo | (~Sgeo@ool-18b98aa4.dyn.optonline.net) (Read error: Connection reset by peer) |
| 2021-03-31 09:06:11 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:b177:1e40:d97b:578c) |
| 2021-03-31 09:07:12 +0200 | raym | (~ray@115.187.32.14) (Read error: Connection reset by peer) |
| 2021-03-31 09:08:02 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection) |
| 2021-03-31 09:08:31 +0200 | unyu | (~pyon@unaffiliated/pyon) (Quit: brb) |
| 2021-03-31 09:08:55 +0200 | <gnumonic> | I'm writing lenses for kind-indexed GADTs w/ singletons. It doesn't violate any lens laws if I write "conditional" lenses with setters that just return the original object if some dependently typed predicate fails to obtain, right? |
| 2021-03-31 09:09:35 +0200 | rmk236 | (~lcampos@ip-37-201-211-26.hsi13.unitymediagroup.de) (Ping timeout: 246 seconds) |
| 2021-03-31 09:09:40 +0200 | raym | (~ray@115.187.32.14) |
| 2021-03-31 09:09:56 +0200 | Tario | (~Tario@201.192.165.173) (Ping timeout: 246 seconds) |
| 2021-03-31 09:10:34 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 09:10:49 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:b177:1e40:d97b:578c) (Ping timeout: 252 seconds) |
| 2021-03-31 09:10:49 +0200 | elfets | (~elfets@ip-37-201-23-96.hsi13.unitymediagroup.de) |
| 2021-03-31 09:10:53 +0200 | <edwardk> | gnumonic: it does. |
| 2021-03-31 09:11:13 +0200 | <edwardk> | the 'you get what you set' law is the one being violated here |
| 2021-03-31 09:11:55 +0200 | Varis | (~Tadas@unaffiliated/varis) |
| 2021-03-31 09:12:03 +0200 | <edwardk> | now you can still use the library, and still compose these with other lenses that also violate this law and all that is lost is that you can sometimes see the fact that the lens library fuses everything into one pass over your structure, so the operations aren't necessarily canonical aside from they are the 'most fused' version. |
| 2021-03-31 09:12:57 +0200 | rmk236 | (~lcampos@2a02:908:3616:b100:e41f:37c6:378f:6062) |
| 2021-03-31 09:13:00 +0200 | <edwardk> | gnumonic: lenses are deliberately very dumb things. |
| 2021-03-31 09:13:24 +0200 | jamm_ | (~jamm@unaffiliated/jamm) |
| 2021-03-31 09:14:58 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) (Ping timeout: 240 seconds) |
| 2021-03-31 09:16:05 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 09:16:39 +0200 | cfricke | (~cfricke@unaffiliated/cfricke) |
| 2021-03-31 09:16:55 +0200 | <gnumonic> | Hm. Would it work if I wrote the lenses over some wrapper type that hides the kind index? So if I did something like :: forall a. Lens' (IndexedType 'KindIndex) SomeComponent where SomeComponent is a wrapper over Component 'ComponentKindIndex? Then I think I'd actually be getting out what I put in |
| 2021-03-31 09:17:29 +0200 | jamm_ | (~jamm@unaffiliated/jamm) (Ping timeout: 245 seconds) |
| 2021-03-31 09:18:01 +0200 | <edwardk> | not sure, it at least sounds plausible. |
| 2021-03-31 09:18:39 +0200 | mawk | (mawk@serveur.io) (Ping timeout: 268 seconds) |
| 2021-03-31 09:20:58 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 260 seconds) |
| 2021-03-31 09:21:46 +0200 | <CatWithMoustache> | Axman6, can i do something similar to that with a map? |
| 2021-03-31 09:22:00 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 09:23:34 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 09:25:48 +0200 | dpl | (~dpl@77.121.78.163) |
| 2021-03-31 09:26:13 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection) |
| 2021-03-31 09:26:29 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 09:30:09 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 09:30:25 +0200 | kadoban_ | (~mud@unaffiliated/kadoban) |
| 2021-03-31 09:30:40 +0200 | kadoban__ | (~mud@unaffiliated/kadoban) (Ping timeout: 252 seconds) |
| 2021-03-31 09:30:42 +0200 | <gnumonic> | Thanks btw edwardk. I'm trying to figure out if I can prove that the existential wrapper thing works, but it's good to know that even if it doesn't I can still use them and nothing will explode :) |
| 2021-03-31 09:31:02 +0200 | tessier | (~treed@kernel-panic/copilotco) (Ping timeout: 265 seconds) |
| 2021-03-31 09:35:01 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 09:35:45 +0200 | olligobber | (olligobber@gateway/vpn/privateinternetaccess/olligobber) |
| 2021-03-31 09:36:59 +0200 | mawk | (mawk@serveur.io) |
| 2021-03-31 09:39:35 +0200 | tessier | (~treed@98.171.210.130) |
| 2021-03-31 09:39:35 +0200 | tessier | (~treed@98.171.210.130) (Changing host) |
| 2021-03-31 09:39:35 +0200 | tessier | (~treed@kernel-panic/copilotco) |
| 2021-03-31 09:39:38 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 240 seconds) |
| 2021-03-31 09:39:53 +0200 | Mrbuck | (~Mrbuck@gateway/tor-sasl/mrbuck) (Remote host closed the connection) |
| 2021-03-31 09:40:18 +0200 | Aquazi | (uid312403@gateway/web/irccloud.com/x-afninwolvrucszhg) |
| 2021-03-31 09:42:43 +0200 | <gnumonic> | Actually while I'm thinking about lenses, I wrote a function that "lifts" traversals over a (particular) kind-indexed GADT to operate over the GADT's existential wrapper. https://gist.github.com/gnumonik/a321defc6ba0af9035653f5ac3693c24 Is that like... an ok thing to do? (I just started using the not-just-record-accessors parts of lens recently) |
| 2021-03-31 09:43:56 +0200 | Mrbuck | (~Mrbuck@gateway/tor-sasl/mrbuck) |
| 2021-03-31 09:46:06 +0200 | Guest41032 | (~laudiacay@67.176.215.84) (Ping timeout: 240 seconds) |
| 2021-03-31 09:46:44 +0200 | maroloccio | (~marolocci@pousada3ja.mma.com.br) |
| 2021-03-31 09:46:53 +0200 | kritzefitz | (~kritzefit@fw-front.credativ.com) |
| 2021-03-31 09:48:13 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 09:48:26 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 09:49:48 +0200 | hiroaki | (~hiroaki@2a02:8108:8c40:2bb8:3745:335c:aec7:833d) (Ping timeout: 246 seconds) |
| 2021-03-31 09:49:57 +0200 | borne | (~fritjof@200116b86411e500f7ed9fd86a2491f0.dip.versatel-1u1.de) |
| 2021-03-31 09:51:41 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 09:52:40 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 09:52:57 +0200 | LKoen | (~LKoen@65.250.88.92.rev.sfr.net) |
| 2021-03-31 09:52:57 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) (Ping timeout: 246 seconds) |
| 2021-03-31 09:53:02 +0200 | gitgood | (~gitgood@80-44-12-39.dynamic.dsl.as9105.com) |
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| 2021-03-31 09:53:11 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 09:53:20 +0200 | Sorny | (~Sornaensi@79.142.232.102.static.router4.bolignet.dk) |
| 2021-03-31 09:53:55 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 09:56:26 +0200 | Sorna | (~Sornaensi@077213203030.dynamic.telenor.dk) (Ping timeout: 260 seconds) |
| 2021-03-31 09:57:25 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 09:58:26 +0200 | gorbelibove | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 09:59:04 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 09:59:04 +0200 | gorbelibove | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 09:59:29 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 10:01:35 +0200 | hiroaki | (~hiroaki@2a02:8108:8c40:2bb8:1351:13b7:f6af:b97a) |
| 2021-03-31 10:01:51 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 10:02:06 +0200 | evanjs | (~evanjs@075-129-098-007.res.spectrum.com) (Read error: Connection reset by peer) |
| 2021-03-31 10:02:12 +0200 | kirb1 | (~kirb@178.239.168.171) (Remote host closed the connection) |
| 2021-03-31 10:02:56 +0200 | Guest41032 | (~laudiacay@67.176.215.84) |
| 2021-03-31 10:03:28 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 10:03:51 +0200 | jacob11 | (~jacob1@185.163.110.108) |
| 2021-03-31 10:03:54 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 10:04:13 +0200 | Wizek | (uid191769@gateway/web/irccloud.com/x-auesgaiuendcjtgu) |
| 2021-03-31 10:05:00 +0200 | thc202 | (~thc202@unaffiliated/thc202) |
| 2021-03-31 10:05:20 +0200 | evanjs | (~evanjs@075-129-098-007.res.spectrum.com) |
| 2021-03-31 10:05:48 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 10:06:11 +0200 | Guest55480 | (~m0rphism@HSI-KBW-085-216-104-059.hsi.kabelbw.de) |
| 2021-03-31 10:07:21 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 10:08:12 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 10:09:00 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 10:09:11 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 10:09:40 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 10:11:35 +0200 | xourt | (d4c620ea@212-198-32-234.rev.numericable.fr) |
| 2021-03-31 10:14:06 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 260 seconds) |
| 2021-03-31 10:14:33 +0200 | gorbelibove | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 10:14:47 +0200 | gorbelibove | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 10:14:47 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 10:15:37 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 10:17:26 +0200 | LiaoTao_ | (~LiaoTao@gateway/tor-sasl/liaotao) (Remote host closed the connection) |
| 2021-03-31 10:17:47 +0200 | LiaoTao | (~LiaoTao@gateway/tor-sasl/liaotao) |
| 2021-03-31 10:18:14 +0200 | CatWithMoustache | (~CatWithMo@gateway/tor-sasl/catwithmoustache) (Quit: Leaving) |
| 2021-03-31 10:19:48 +0200 | LKoen | (~LKoen@65.250.88.92.rev.sfr.net) (Quit: “It’s only logical. First you learn to talk, then you learn to think. Too bad it’s not the other way round.”) |
| 2021-03-31 10:21:10 +0200 | ddellacosta | (~ddellacos@86.106.143.144) |
| 2021-03-31 10:23:02 +0200 | shad0w_ | (a0ca25aa@160.202.37.170) (Ping timeout: 240 seconds) |
| 2021-03-31 10:25:32 +0200 | ddellacosta | (~ddellacos@86.106.143.144) (Ping timeout: 246 seconds) |
| 2021-03-31 10:26:06 +0200 | __minoru__shirae | (~shiraeesh@109.166.57.161) |
| 2021-03-31 10:26:33 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 10:27:15 +0200 | rmk236 | (~lcampos@2a02:908:3616:b100:e41f:37c6:378f:6062) (Ping timeout: 246 seconds) |
| 2021-03-31 10:30:31 +0200 | andreas303 | (~andreas@gateway/tor-sasl/andreas303) |
| 2021-03-31 10:32:15 +0200 | Sornaensis | (~Sornaensi@077213203030.dynamic.telenor.dk) |
| 2021-03-31 10:33:06 +0200 | Guest41032 | (~laudiacay@67.176.215.84) (Ping timeout: 240 seconds) |
| 2021-03-31 10:35:34 +0200 | Sorny | (~Sornaensi@79.142.232.102.static.router4.bolignet.dk) (Ping timeout: 252 seconds) |
| 2021-03-31 10:35:56 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 252 seconds) |
| 2021-03-31 10:39:55 +0200 | raehik | (~raehik@cpc95906-rdng25-2-0-cust156.15-3.cable.virginm.net) |
| 2021-03-31 10:42:06 +0200 | stree | (~stree@68.36.8.116) (Ping timeout: 260 seconds) |
| 2021-03-31 10:47:20 +0200 | tionos | (~tionos@185.173.235.27) |
| 2021-03-31 10:48:23 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 10:50:52 +0200 | Sorna | (~Sornaensi@79.142.232.102.static.router4.bolignet.dk) |
| 2021-03-31 10:53:31 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 258 seconds) |
| 2021-03-31 10:53:31 +0200 | Sornaensis | (~Sornaensi@077213203030.dynamic.telenor.dk) (Ping timeout: 258 seconds) |
| 2021-03-31 10:55:07 +0200 | stree | (~stree@68.36.8.116) |
| 2021-03-31 10:55:09 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) (Read error: Connection reset by peer) |
| 2021-03-31 10:56:11 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) |
| 2021-03-31 10:56:16 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) |
| 2021-03-31 11:00:10 +0200 | invent[m] | (inventmatr@gateway/shell/matrix.org/x-szzijrqsdjgoiqjh) (Quit: Idle for 30+ days) |
| 2021-03-31 11:00:30 +0200 | ddellacosta | (~ddellacos@86.106.143.79) |
| 2021-03-31 11:00:56 +0200 | fendor | (~fendor@178.165.130.8.wireless.dyn.drei.com) |
| 2021-03-31 11:01:03 +0200 | LKoen | (~LKoen@65.250.88.92.rev.sfr.net) |
| 2021-03-31 11:02:19 +0200 | petersen | (~petersen@redhat/juhp) (Quit: petersen) |
| 2021-03-31 11:03:02 +0200 | petersen | (~petersen@redhat/juhp) |
| 2021-03-31 11:05:16 +0200 | ddellacosta | (~ddellacos@86.106.143.79) (Ping timeout: 252 seconds) |
| 2021-03-31 11:13:08 +0200 | astroanax | (astroanax@gateway/shell/ircnow/x-himxsnhawzzdfgwb) (Quit: quit) |
| 2021-03-31 11:15:01 +0200 | michalz | (~user@185.246.204.56) |
| 2021-03-31 11:16:54 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 11:17:42 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 11:19:01 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 11:19:29 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection) |
| 2021-03-31 11:19:51 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 11:19:57 +0200 | Guest28699 | mstruebing |
| 2021-03-31 11:20:02 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 11:22:36 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 268 seconds) |
| 2021-03-31 11:26:56 +0200 | vgtw | (~vgtw@gateway/tor-sasl/vgtw) (Remote host closed the connection) |
| 2021-03-31 11:27:11 +0200 | vgtw | (~vgtw@gateway/tor-sasl/vgtw) |
| 2021-03-31 11:27:30 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 11:32:24 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 11:32:27 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 268 seconds) |
| 2021-03-31 11:34:03 +0200 | yunusaydin | (4eb8266d@78.184.38.109) |
| 2021-03-31 11:37:12 +0200 | dpl_ | (~dpl@77.121.78.163) |
| 2021-03-31 11:37:13 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) (Ping timeout: 258 seconds) |
| 2021-03-31 11:37:59 +0200 | kuribas | (~user@ptr-25vy0i8a26pq5ck0xjc.18120a2.ip6.access.telenet.be) |
| 2021-03-31 11:39:08 +0200 | cfricke | (~cfricke@unaffiliated/cfricke) (Ping timeout: 258 seconds) |
| 2021-03-31 11:39:47 +0200 | jpds | (~jpds@gateway/tor-sasl/jpds) (Remote host closed the connection) |
| 2021-03-31 11:40:06 +0200 | dpl | (~dpl@77.121.78.163) (Ping timeout: 240 seconds) |
| 2021-03-31 11:40:07 +0200 | jpds | (~jpds@gateway/tor-sasl/jpds) |
| 2021-03-31 11:40:51 +0200 | jpds | (~jpds@gateway/tor-sasl/jpds) (Remote host closed the connection) |
| 2021-03-31 11:41:12 +0200 | jpds | (~jpds@gateway/tor-sasl/jpds) |
| 2021-03-31 11:42:45 +0200 | Mrbuck | (~Mrbuck@gateway/tor-sasl/mrbuck) (Ping timeout: 240 seconds) |
| 2021-03-31 11:43:10 +0200 | ubert | (~Thunderbi@p200300ecdf25d9fde6b318fffe838f33.dip0.t-ipconnect.de) |
| 2021-03-31 11:43:10 +0200 | grumble | (~Thunderbi@freenode/staff/grumble) (Quit: K-Lined) |
| 2021-03-31 11:43:54 +0200 | NinjaTrappeur | (~ninja@unaffiliated/ninjatrappeur) (Ping timeout: 246 seconds) |
| 2021-03-31 11:45:29 +0200 | grumble | (~Thunderbi@freenode/staff/grumble) |
| 2021-03-31 11:45:33 +0200 | CaptainIRS | (9d3386ab@157.51.134.171) |
| 2021-03-31 11:45:38 +0200 | NinjaTrappeur | (~ninja@unaffiliated/ninjatrappeur) |
| 2021-03-31 11:48:40 +0200 | DavidEichmann | (~david@47.27.93.209.dyn.plus.net) |
| 2021-03-31 11:50:36 +0200 | neiluj | (~jco@91-167-203-101.subs.proxad.net) |
| 2021-03-31 11:50:36 +0200 | neiluj | (~jco@91-167-203-101.subs.proxad.net) (Changing host) |
| 2021-03-31 11:50:36 +0200 | neiluj | (~jco@unaffiliated/neiluj) |
| 2021-03-31 11:51:32 +0200 | cfricke | (~cfricke@unaffiliated/cfricke) |
| 2021-03-31 11:55:28 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 11:57:07 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Quit: Connection closed) |
| 2021-03-31 11:57:26 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 11:59:05 +0200 | <CrabMan> | I am working on a project which uses stack. Thus, it has a stack.yaml file. I use ghc from nix-shell, thus I need to pass `--nix` to stack. I can either pass it as an argument or include it in stack.yaml. But stack.yaml is used by everyone on the team and thus it's bad to add `nix: enable: true` there. Is there some kind of local version of stack.yaml that's used only on my computer? |
| 2021-03-31 12:01:48 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:02:06 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 252 seconds) |
| 2021-03-31 12:03:53 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:04:36 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:04:58 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:06:06 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 12:07:38 +0200 | maroloccio | (~marolocci@pousada3ja.mma.com.br) (Ping timeout: 240 seconds) |
| 2021-03-31 12:08:04 +0200 | rond_ | (594020a1@89-64-32-161.dynamic.chello.pl) |
| 2021-03-31 12:09:09 +0200 | Xnuk- | Xnuk |
| 2021-03-31 12:11:18 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) (Ping timeout: 268 seconds) |
| 2021-03-31 12:13:38 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 260 seconds) |
| 2021-03-31 12:14:12 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:14:50 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 12:17:05 +0200 | cfricke | (~cfricke@unaffiliated/cfricke) (Ping timeout: 258 seconds) |
| 2021-03-31 12:19:58 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 240 seconds) |
| 2021-03-31 12:20:00 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 12:20:39 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 12:22:04 +0200 | Guest41032 | (~laudiacay@67.176.215.84) |
| 2021-03-31 12:24:27 +0200 | gehmehgeh | (~ircuser1@gateway/tor-sasl/gehmehgeh) |
| 2021-03-31 12:24:42 +0200 | xourt | (d4c620ea@212-198-32-234.rev.numericable.fr) (Ping timeout: 240 seconds) |
| 2021-03-31 12:24:50 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Ping timeout: 260 seconds) |
| 2021-03-31 12:26:06 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 268 seconds) |
| 2021-03-31 12:26:43 +0200 | Guest41032 | (~laudiacay@67.176.215.84) (Ping timeout: 268 seconds) |
| 2021-03-31 12:26:44 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 12:26:52 +0200 | sQVe | (~sQVe@unaffiliated/sqve) |
| 2021-03-31 12:27:07 +0200 | jakalx | (~jakalx@base.jakalx.net) () |
| 2021-03-31 12:27:59 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 12:29:26 +0200 | Erutuon_ | (~Erutuon@97-116-27-119.mpls.qwest.net) (Ping timeout: 260 seconds) |
| 2021-03-31 12:30:13 +0200 | jakalx | (~jakalx@base.jakalx.net) |
| 2021-03-31 12:30:48 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:31:13 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:31:53 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 246 seconds) |
| 2021-03-31 12:32:15 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 12:33:41 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:36:22 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:36:39 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:37:25 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 12:37:34 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:37:38 +0200 | cole-h | (~cole-h@c-73-48-197-220.hsd1.ca.comcast.net) (Ping timeout: 240 seconds) |
| 2021-03-31 12:37:39 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:38:03 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:38:11 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:38:23 +0200 | yunusaydin | (4eb8266d@78.184.38.109) (Quit: Connection closed) |
| 2021-03-31 12:38:43 +0200 | malumore | (~malumore@151.62.117.70) |
| 2021-03-31 12:39:11 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) |
| 2021-03-31 12:40:43 +0200 | ph88 | (~ph88@ip5f5af71a.dynamic.kabel-deutschland.de) |
| 2021-03-31 12:40:49 +0200 | <ph88> | hi all |
| 2021-03-31 12:41:02 +0200 | <ph88> | i have trouble to understand this compiler error https://bpa.st/X5DA could someone take a look ? |
| 2021-03-31 12:41:02 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:211f:91f5:87eb:894) (Remote host closed the connection) |
| 2021-03-31 12:41:58 +0200 | ddellacosta | (ddellacost@gateway/vpn/mullvad/ddellacosta) (Ping timeout: 240 seconds) |
| 2021-03-31 12:42:45 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 268 seconds) |
| 2021-03-31 12:42:50 +0200 | <tomsmeding> | ph88: what's the type of 'tryIOError'? |
| 2021-03-31 12:43:46 +0200 | <tomsmeding> | ph88: oh right, perhaps you need to 'lift' the result of 'throwError' |
| 2021-03-31 12:43:52 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 12:44:32 +0200 | <tomsmeding> | nah, that depends on the type of tryIOError |
| 2021-03-31 12:45:38 +0200 | ph88 | (~ph88@ip5f5af71a.dynamic.kabel-deutschland.de) (Ping timeout: 240 seconds) |
| 2021-03-31 12:47:55 +0200 | ph88 | (~ph88@2a02:8109:9e00:7e5c:80c0:e61:5729:782) |
| 2021-03-31 12:48:04 +0200 | jamm_ | (~jamm@unaffiliated/jamm) |
| 2021-03-31 12:49:05 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 260 seconds) |
| 2021-03-31 12:49:18 +0200 | <ph88> | tomsmeding, hi, i got disconneted. saw you replied from the logs of this channel |
| 2021-03-31 12:49:36 +0200 | <ph88> | tryIOError :: IO a -> IO (Either IOError a) |
| 2021-03-31 12:49:47 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 12:49:53 +0200 | <tomsmeding> | how is tryIOError going to work in a non-IO monad then? it's only MonadIO, not real IO |
| 2021-03-31 12:50:04 +0200 | <tomsmeding> | I admit the error is inscrutable though :p |
| 2021-03-31 12:52:02 +0200 | <ph88> | https://bpa.st/26ZQ |
| 2021-03-31 12:52:32 +0200 | <tomsmeding> | ph88: in general tryIOError can't work on arbitrary MonadIO monads, I believe; e.g. the unliftio version, https://hackage.haskell.org/package/unliftio-0.2.14/docs/UnliftIO-Exception.html#v:tryIO , requires MonadUnliftIO which doesn't allow state in the transformer stack: https://hackage.haskell.org/package/unliftio-core-0.2.0.1/docs/Control-Monad-IO-Unlift.html#t:Mona… |
| 2021-03-31 12:52:34 +0200 | <merijn> | tomsmeding: "liftIO . tryIOError"? :p |
| 2021-03-31 12:53:10 +0200 | <merijn> | eh |
| 2021-03-31 12:53:31 +0200 | <merijn> | ph88: That code example won't use MonadError |
| 2021-03-31 12:53:36 +0200 | <tomsmeding> | merijn: 'action' is in MonadIO, not in IO :p |
| 2021-03-31 12:53:45 +0200 | <merijn> | Or rather, it will |
| 2021-03-31 12:54:18 +0200 | <tomsmeding> | ph88: I think you can only make it work if 'action' is not of type 'm a' but of 'IO a', or more generically MonadUnliftIO m => m a but that won't help you much |
| 2021-03-31 12:54:21 +0200 | <merijn> | tomsmeding: I misunderstood what you mean |
| 2021-03-31 12:54:24 +0200 | <merijn> | *meant |
| 2021-03-31 12:54:41 +0200 | <merijn> | MonadUnliftIO is profoundly dangerous, tbh |
| 2021-03-31 12:55:13 +0200 | <tomsmeding> | the documentation for MonadUnliftIO states you can only really use it with ReaderT and IdentityT, in which case I guess it's safe? |
| 2021-03-31 12:55:16 +0200 | <tomsmeding> | haven't used it myself |
| 2021-03-31 12:55:36 +0200 | <merijn> | tomsmeding: The problem isn't "what is MonadUnliftIO" *that* is fine |
| 2021-03-31 12:55:48 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 258 seconds) |
| 2021-03-31 12:56:07 +0200 | <merijn> | tomsmeding: THe problem is that it is tempting for people to use the unlift stuff to run stuff in other threads/async |
| 2021-03-31 12:56:18 +0200 | <merijn> | But unliftIO doesn't handle that nicely at all |
| 2021-03-31 12:56:45 +0200 | <merijn> | For example, ResourceT is MonadUnliftIO, but when you introduce threads that ruins everything |
| 2021-03-31 12:57:17 +0200 | <tomsmeding> | so basically the problem is that people write instances of MonadUnliftIO that are thread-unsafe? |
| 2021-03-31 12:58:22 +0200 | <merijn> | Basically, the problem is that everyone who is not me or approved by me should be banned from writing concurrent code and threads >.< |
| 2021-03-31 12:58:42 +0200 | <tomsmeding> | 🤔 |
| 2021-03-31 12:59:25 +0200 | ephemient | (uid407513@gateway/web/irccloud.com/x-kreuktrxowjvrjcm) |
| 2021-03-31 12:59:51 +0200 | LKoen | (~LKoen@65.250.88.92.rev.sfr.net) (Quit: “It’s only logical. First you learn to talk, then you learn to think. Too bad it’s not the other way round.”) |
| 2021-03-31 13:00:06 +0200 | Alleria | (~textual@2603-7000-3040-0000-1143-d148-dab6-7a8a.res6.spectrum.com) |
| 2021-03-31 13:00:30 +0200 | Alleria | Guest22240 |
| 2021-03-31 13:00:46 +0200 | elfets | (~elfets@ip-37-201-23-96.hsi13.unitymediagroup.de) (Ping timeout: 260 seconds) |
| 2021-03-31 13:01:14 +0200 | <merijn> | tomsmeding: https://github.com/snoyberg/conduit/issues/425 |
| 2021-03-31 13:02:09 +0200 | <merijn> | tomsmeding: A lot of the FPComplete ecosystem of "safe by default" libraries leave a considerable of undocumented uncertain pitfalls, tbh |
| 2021-03-31 13:02:58 +0200 | peanut_ | (~peanut_@2a02:8388:a101:2600:1fde:3e3:f7a:66f2) |
| 2021-03-31 13:02:58 +0200 | stree | (~stree@68.36.8.116) (Ping timeout: 240 seconds) |
| 2021-03-31 13:03:51 +0200 | <ph88> | tomsmeding, thanks for your help. Your comment here was correct: I think you can only make it work if 'action' is not of type 'm a' but of 'IO a' |
| 2021-03-31 13:04:03 +0200 | <tomsmeding> | merijn: hah! interesting |
| 2021-03-31 13:04:15 +0200 | tomsmeding | has to go for a while |
| 2021-03-31 13:04:32 +0200 | sQVe | (~sQVe@unaffiliated/sqve) (Quit: Bye!) |
| 2021-03-31 13:04:58 +0200 | Guest22240 | (~textual@2603-7000-3040-0000-1143-d148-dab6-7a8a.res6.spectrum.com) (Ping timeout: 276 seconds) |
| 2021-03-31 13:05:31 +0200 | SaitamaPlus | (uid272474@gateway/web/irccloud.com/x-fidhhtxlftktthli) |
| 2021-03-31 13:06:57 +0200 | nf | (~n@monade.li) (Quit: Fairfarren.) |
| 2021-03-31 13:07:40 +0200 | nf | (~n@monade.li) |
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| 2021-03-31 13:24:19 +0200 | mouseghost | (~draco@87-206-9-185.dynamic.chello.pl) |
| 2021-03-31 13:24:19 +0200 | mouseghost | (~draco@87-206-9-185.dynamic.chello.pl) (Changing host) |
| 2021-03-31 13:24:19 +0200 | mouseghost | (~draco@wikipedia/desperek) |
| 2021-03-31 13:26:37 +0200 | dpl__ | (~dpl@77.121.78.163) |
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| 2021-03-31 13:29:29 +0200 | ph88^ | (~ph88@ip5f5af71a.dynamic.kabel-deutschland.de) |
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| 2021-03-31 13:31:51 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 260 seconds) |
| 2021-03-31 13:33:06 +0200 | ph88 | (~ph88@2a02:8109:9e00:7e5c:80c0:e61:5729:782) (Ping timeout: 246 seconds) |
| 2021-03-31 13:33:36 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 260 seconds) |
| 2021-03-31 13:33:43 +0200 | Alleria__ | (~textual@mskresolve-a.mskcc.org) |
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| 2021-03-31 13:36:24 +0200 | <ph88^> | are debug builds slower than normal builds ? |
| 2021-03-31 13:36:43 +0200 | o1lo01ol1o | (~o1lo01ol1@bl7-88-181.dsl.telepac.pt) |
| 2021-03-31 13:37:06 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 13:38:03 +0200 | LKoen | (~LKoen@65.250.88.92.rev.sfr.net) |
| 2021-03-31 13:38:22 +0200 | LKoen | (~LKoen@65.250.88.92.rev.sfr.net) (Remote host closed the connection) |
| 2021-03-31 13:38:34 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 13:39:49 +0200 | <merijn> | ph88^: THe resulting code, you mean? |
| 2021-03-31 13:40:19 +0200 | kafl | (~kafl@unaffiliated/kafl) |
| 2021-03-31 13:40:36 +0200 | raehik | (~raehik@cpc95906-rdng25-2-0-cust156.15-3.cable.virginm.net) (Ping timeout: 260 seconds) |
| 2021-03-31 13:40:42 +0200 | <ph88^> | i mean the time waiting for GHC# |
| 2021-03-31 13:41:00 +0200 | raehik | (~raehik@cpc95906-rdng25-2-0-cust156.15-3.cable.virginm.net) |
| 2021-03-31 13:41:58 +0200 | <merijn> | It should't? |
| 2021-03-31 13:43:42 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 260 seconds) |
| 2021-03-31 13:44:31 +0200 | matryoshka | (~matryoshk@2606:6080:1002:8:3285:30e:de43:8809) |
| 2021-03-31 13:44:37 +0200 | <tomsmeding> | ph88^: what do you mean by "debug build"? non-optimising, or also profiling? |
| 2021-03-31 13:45:01 +0200 | <ph88^> | non optimising and profiling |
| 2021-03-31 13:45:06 +0200 | <tomsmeding> | non-optimising should always be faster than, or at least as fast as, optimising |
| 2021-03-31 13:45:13 +0200 | <tomsmeding> | but profiling may take a little longer, don't know about that |
| 2021-03-31 13:45:39 +0200 | <tomsmeding> | that adds instrumentation that inhibits optimisations that may make the compiler run faster |
| 2021-03-31 13:45:40 +0200 | <ph88^> | by the way is there a way to get string/text overloading with a type ? just because i would like to put a top level signature |
| 2021-03-31 13:45:53 +0200 | <tomsmeding> | ph88^: IsString s => ... s ... ? |
| 2021-03-31 13:45:57 +0200 | <ph88^> | oki |
| 2021-03-31 13:46:03 +0200 | <ph88^> | thank you |
| 2021-03-31 13:46:11 +0200 | <tomsmeding> | that overloads with a lot more than just String/Text though |
| 2021-03-31 13:48:28 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) |
| 2021-03-31 13:49:32 +0200 | rmk236 | (~lcampos@ip-37-201-211-26.hsi13.unitymediagroup.de) |
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| 2021-03-31 13:52:45 +0200 | tmciver | (~tmciver@cpe-172-101-40-226.maine.res.rr.com) |
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| 2021-03-31 13:54:37 +0200 | orbeliboveg | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) |
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| 2021-03-31 13:55:01 +0200 | gorbelibove | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) (Remote host closed the connection) |
| 2021-03-31 13:55:02 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) (Remote host closed the connection) |
| 2021-03-31 13:56:20 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) |
| 2021-03-31 13:57:10 +0200 | <ph88^> | can i throw my own IOError ? |
| 2021-03-31 13:57:59 +0200 | __minoru__shirae | (~shiraeesh@109.166.57.161) (Ping timeout: 246 seconds) |
| 2021-03-31 13:58:20 +0200 | ddellacosta | (~ddellacos@86.106.143.209) (Ping timeout: 252 seconds) |
| 2021-03-31 13:59:22 +0200 | <ph88^> | hhm scrap that question :p |
| 2021-03-31 14:00:13 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 14:01:41 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 268 seconds) |
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| 2021-03-31 14:07:02 +0200 | geekosaur | (82650c7a@130.101.12.122) |
| 2021-03-31 14:08:02 +0200 | rmk236 | (~lcampos@2a02:908:3616:b100:96f1:d4a5:d139:4f48) |
| 2021-03-31 14:09:46 +0200 | viluon | (uid453725@gateway/web/irccloud.com/x-uyquvhnfkmiqllxw) |
| 2021-03-31 14:10:32 +0200 | solvr | (57e3c46d@87.227.196.109) |
| 2021-03-31 14:11:25 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 14:12:02 +0200 | Yuu-chan | (bcaa545d@188.170.84.93) |
| 2021-03-31 14:13:03 +0200 | m1dnight_ | m1dnight__ |
| 2021-03-31 14:13:11 +0200 | m1dnight__ | m1dnight_ |
| 2021-03-31 14:13:17 +0200 | <Yuu-chan> | @djinn Alternative f => f (Maybe a) -> f a |
| 2021-03-31 14:13:17 +0200 | <lambdabot> | Error: Class not found: Alternative |
| 2021-03-31 14:13:51 +0200 | <Yuu-chan> | @djinn Control.Applicative.Alternative f => f (Maybe a) -> f a |
| 2021-03-31 14:13:51 +0200 | <lambdabot> | Error: Class not found: Control.Applicative.Alternative |
| 2021-03-31 14:14:50 +0200 | Benzi-Junior | (~BenziJuni@88-149-67-143.du.xdsl.is) (Ping timeout: 252 seconds) |
| 2021-03-31 14:15:00 +0200 | <geekosaur> | djinn is a bit out of date |
| 2021-03-31 14:15:16 +0200 | star_cloud | (~star_clou@ec2-34-220-44-120.us-west-2.compute.amazonaws.com) (Ping timeout: 268 seconds) |
| 2021-03-31 14:15:21 +0200 | <ski> | @type (maybe mempty return =<<) |
| 2021-03-31 14:15:23 +0200 | <lambdabot> | (Monad m, Monoid (m b)) => m (Maybe b) -> m b |
| 2021-03-31 14:15:34 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) (Ping timeout: 252 seconds) |
| 2021-03-31 14:15:42 +0200 | <ski> | @type (maybe mzero return =<<) -- er, rather |
| 2021-03-31 14:15:43 +0200 | <lambdabot> | MonadPlus m => m (Maybe b) -> m b |
| 2021-03-31 14:15:45 +0200 | ubert | (~Thunderbi@p200300ecdf25d9fde6b318fffe838f33.dip0.t-ipconnect.de) (Ping timeout: 250 seconds) |
| 2021-03-31 14:15:47 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:3823:8d85:637f:874d) |
| 2021-03-31 14:16:01 +0200 | <Yuu-chan> | @type (maybe empty return =<<) |
| 2021-03-31 14:16:02 +0200 | <lambdabot> | (Monad m, Alternative m) => m (Maybe b) -> m b |
| 2021-03-31 14:16:24 +0200 | ubert | (~Thunderbi@p200300ecdf25d9fde6b318fffe838f33.dip0.t-ipconnect.de) |
| 2021-03-31 14:16:43 +0200 | rmk236 | (~lcampos@2a02:908:3616:b100:96f1:d4a5:d139:4f48) (Quit: Leaving.) |
| 2021-03-31 14:17:54 +0200 | gorbelibove | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) |
| 2021-03-31 14:17:56 +0200 | <Yuu-chan> | ski thanks |
| 2021-03-31 14:18:03 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) (Remote host closed the connection) |
| 2021-03-31 14:18:03 +0200 | gorbelibove | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) (Remote host closed the connection) |
| 2021-03-31 14:18:03 +0200 | Benzi-Junior | (~BenziJuni@dsl-149-67-143.hive.is) |
| 2021-03-31 14:18:28 +0200 | <ski> | it seems to me, with that problem formulation, you won't get around `Monad'. except for trivial solutions like `const empty' |
| 2021-03-31 14:18:58 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) |
| 2021-03-31 14:19:01 +0200 | <ski> | (`Maybe (f a) -> f a' would be another thing, of course) |
| 2021-03-31 14:19:18 +0200 | AkechiShiro | (~AkechiShi@2a01:e0a:5f9:9681:1473:3dff:fe42:56a9) (Quit: WeeChat 2.9) |
| 2021-03-31 14:19:37 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) (Remote host closed the connection) |
| 2021-03-31 14:19:56 +0200 | <Yuu-chan> | Monad constraint is fine |
| 2021-03-31 14:19:57 +0200 | AkechiShiro | (~AkechiShi@2a01:e0a:5f9:9681:1473:3dff:fe42:56a9) |
| 2021-03-31 14:20:12 +0200 | <ski> | you want the effects that the output action performs to depend on the result produced by the input action. that's dynamic sequencing, iow monads |
| 2021-03-31 14:20:36 +0200 | <Yuu-chan> | Yep, I understand now |
| 2021-03-31 14:20:50 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) |
| 2021-03-31 14:21:10 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) (Remote host closed the connection) |
| 2021-03-31 14:21:50 +0200 | egorbelibov | (~65676f72@2001:8a0:5708:2a00:bc7d:b8d3:66cd:f4d7) |
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| 2021-03-31 14:30:52 +0200 | Yuu-chan | (bcaa545d@188.170.84.93) (Quit: Ping timeout (120 seconds)) |
| 2021-03-31 14:31:58 +0200 | v01d4lph4 | (~v01d4lph4@223.190.20.92) (Remote host closed the connection) |
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| 2021-03-31 14:33:38 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:3823:8d85:637f:874d) (Quit: My MacBook has gone to sleep. ZZZzzz…) |
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| 2021-03-31 14:33:57 +0200 | solvr | (57e3c46d@87.227.196.109) (Quit: Connection closed) |
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| 2021-03-31 14:41:24 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) |
| 2021-03-31 14:42:42 +0200 | geekosaur | (82650c7a@130.101.12.122) (Ping timeout: 240 seconds) |
| 2021-03-31 14:43:03 +0200 | AkechiShiro | (~AkechiShi@2a01:e0a:5f9:9681:1473:3dff:fe42:56a9) (Quit: WeeChat 2.9) |
| 2021-03-31 14:44:08 +0200 | dpl_ | (~dpl@77.121.78.163) |
| 2021-03-31 14:44:11 +0200 | dpl__ | (~dpl@77.121.78.163) (Ping timeout: 260 seconds) |
| 2021-03-31 14:44:32 +0200 | rmk236 | (~lcampos@ip-37-201-211-26.hsi13.unitymediagroup.de) |
| 2021-03-31 14:53:17 +0200 | urodna | (~urodna@unaffiliated/urodna) |
| 2021-03-31 14:54:42 +0200 | geekosaur | (82650c7a@130.101.12.122) |
| 2021-03-31 14:59:27 +0200 | <ph88^> | i am using vscode and haskell language server. I get a popup that GHC is not installed, but it is through stack. Anyone know how to make it work ? |
| 2021-03-31 15:03:30 +0200 | ddellacosta | (~ddellacos@86.106.143.157) |
| 2021-03-31 15:03:46 +0200 | geowiesnot | (~user@87-89-181-157.abo.bbox.fr) |
| 2021-03-31 15:04:13 +0200 | <maerwald> | I thought the plugin installs GHC for you |
| 2021-03-31 15:04:51 +0200 | dandart | (~Thunderbi@home.dandart.co.uk) |
| 2021-03-31 15:07:04 +0200 | acidjnk_new | (~acidjnk@p200300d0c72b9549c1d5f2f7c60f6477.dip0.t-ipconnect.de) (Ping timeout: 245 seconds) |
| 2021-03-31 15:08:41 +0200 | ddellacosta | (~ddellacos@86.106.143.157) (Ping timeout: 260 seconds) |
| 2021-03-31 15:08:53 +0200 | alx741 | (~alx741@181.196.69.168) |
| 2021-03-31 15:09:52 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 15:10:06 +0200 | rmk236 | (~lcampos@ip-37-201-211-26.hsi13.unitymediagroup.de) (Quit: Leaving.) |
| 2021-03-31 15:10:20 +0200 | bitmagie | (~Thunderbi@200116b806372b00585283af1f69c7fb.dip.versatel-1u1.de) |
| 2021-03-31 15:10:35 +0200 | sajith_ | sajith |
| 2021-03-31 15:11:09 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) (Remote host closed the connection) |
| 2021-03-31 15:11:37 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) |
| 2021-03-31 15:11:37 +0200 | ddellacosta | (~ddellacos@ool-44c73afa.dyn.optonline.net) |
| 2021-03-31 15:12:18 +0200 | <ph88^> | hhmm then something didnt go right there |
| 2021-03-31 15:12:27 +0200 | Sorny | (~Sornaensi@077213203030.dynamic.telenor.dk) |
| 2021-03-31 15:15:04 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 268 seconds) |
| 2021-03-31 15:16:34 +0200 | Sorna | (~Sornaensi@79.142.232.102.static.router4.bolignet.dk) (Ping timeout: 260 seconds) |
| 2021-03-31 15:17:01 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) (Ping timeout: 260 seconds) |
| 2021-03-31 15:17:03 +0200 | carlomagno | (~cararell@148.87.23.10) |
| 2021-03-31 15:17:16 +0200 | jamm__ | (~jamm@unaffiliated/jamm) (Remote host closed the connection) |
| 2021-03-31 15:17:25 +0200 | egwor | (520bc907@cpc110777-lewi20-2-0-cust262.2-4.cable.virginm.net) |
| 2021-03-31 15:20:57 +0200 | grrandi | (mlp@kapsi.fi) |
| 2021-03-31 15:21:08 +0200 | <egwor> | I'm trying to get to grips with cabal project layouts. Are there good example structures (along with the cabal project files) that are available to see? |
| 2021-03-31 15:22:58 +0200 | <maerwald> | egwor: the cabal project |
| 2021-03-31 15:24:40 +0200 | <merijn> | egwor: I mean, how much structure do you need? That mostly only becomes relevant when projects start hitting a certain size |
| 2021-03-31 15:24:49 +0200 | <merijn> | Doesn't seem much point in worrying about it too early on... |
| 2021-03-31 15:24:50 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) |
| 2021-03-31 15:24:57 +0200 | stree | (~stree@68.36.8.116) (Ping timeout: 268 seconds) |
| 2021-03-31 15:25:19 +0200 | <egwor> | I want to take some of my uni projects (very simple) and add tests/get them to build |
| 2021-03-31 15:25:53 +0200 | <egwor> | What I'd quite like is a single project for an exercise/practical and then a library or executable for each part of the practical |
| 2021-03-31 15:25:55 +0200 | <merijn> | egwor: I mean, the only extra structure you'd really need is "a test directory that has the tests"? :) |
| 2021-03-31 15:26:43 +0200 | <merijn> | egwor: 1 directory per executable and then either the library in src or just in the root of the directory? |
| 2021-03-31 15:29:53 +0200 | idhugo | (~idhugo@87-49-147-45-mobile.dk.customer.tdc.net) (Ping timeout: 268 seconds) |
| 2021-03-31 15:30:21 +0200 | <egwor> | I guess what I'm struggling with is that in app I have a Main.lhs. That refers to the Factor module, where I have my code. That sits inside src. To get that to compile, under the 'executable Factor' section I added a build-depends of Factor. |
| 2021-03-31 15:30:50 +0200 | <egwor> | I was a bit surprised that I needed to add an explicit 'build-depends' dependency on the Factor module |
| 2021-03-31 15:31:16 +0200 | <egwor> | so I assumed I'd some something wrong => hence the questions of whether there are some examples (with actual structure commited) |
| 2021-03-31 15:31:30 +0200 | glaceon | (~glaceon@117.222.65.198) |
| 2021-03-31 15:32:05 +0200 | <merijn> | egwor: No, that's correct |
| 2021-03-31 15:32:33 +0200 | <egwor> | ahh, ok, thanks! |
| 2021-03-31 15:33:02 +0200 | <merijn> | egwor: The fact that your library and executable are in the same package doesn't (automatically) mean your executable uses/depends on that library |
| 2021-03-31 15:33:19 +0200 | xff0x | (~xff0x@2001:1a81:52d9:7900:6b0c:e3df:c0c:8727) (Ping timeout: 245 seconds) |
| 2021-03-31 15:33:54 +0200 | <merijn> | egwor: A fact that seems strange in the current hackage version of "max 1 library per package", but cabal already supports multiple libraries per package (and hackage eventually will too), in which case not all executables necessarily depend on all libraries in the same package |
| 2021-03-31 15:34:26 +0200 | xff0x | (~xff0x@2001:1a81:52d9:7900:a1dd:11c7:dd0c:6878) |
| 2021-03-31 15:34:29 +0200 | vchlup | (~vchlup@nat.brnet.cz) |
| 2021-03-31 15:34:35 +0200 | <egwor> | thanks, that's helpful. |
| 2021-03-31 15:34:55 +0200 | <merijn> | explicit is better than implicit, and all that ;) |
| 2021-03-31 15:34:58 +0200 | <egwor> | I appreciate that I'm doing some pretty basic stuff here, but that's sort of the point-- to figure this out:) |
| 2021-03-31 15:35:03 +0200 | <egwor> | thanks :) |
| 2021-03-31 15:37:08 +0200 | bergey | (~user@pool-74-108-99-127.nycmny.fios.verizon.net) |
| 2021-03-31 15:37:28 +0200 | stree | (~stree@68.36.8.116) |
| 2021-03-31 15:37:29 +0200 | cfricke | (~cfricke@unaffiliated/cfricke) (Quit: WeeChat 3.1) |
| 2021-03-31 15:38:46 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:7ca5:80cc:e540:ad18) |
| 2021-03-31 15:38:57 +0200 | hexfive | (~hexfive@50.35.83.177) (Quit: i must go. my people need me.) |
| 2021-03-31 15:39:31 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 15:40:35 +0200 | acidjnk_new | (~acidjnk@p200300d0c72b95496cfd1d07fe22841d.dip0.t-ipconnect.de) |
| 2021-03-31 15:40:37 +0200 | ddellac__ | (ddellacost@gateway/vpn/mullvad/ddellacosta) |
| 2021-03-31 15:41:34 +0200 | deviantfero | (~deviantfe@190.150.27.58) |
| 2021-03-31 15:43:03 +0200 | glaceon | (~glaceon@117.222.65.198) () |
| 2021-03-31 15:43:58 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 240 seconds) |
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| 2021-03-31 15:45:29 +0200 | geekosaur | (82650c7a@130.101.12.122) (Quit: Connection closed) |
| 2021-03-31 15:45:39 +0200 | ep1ctetus | (~epictetus@ip72-194-215-136.sb.sd.cox.net) |
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| 2021-03-31 15:50:31 +0200 | coot | (~coot@37.30.55.131.nat.umts.dynamic.t-mobile.pl) (Quit: coot) |
| 2021-03-31 15:51:54 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 15:52:28 +0200 | jamm_ | (~jamm@unaffiliated/jamm) |
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| 2021-03-31 15:57:28 +0200 | solvr | (57e3c46d@87.227.196.109) (Quit: Connection closed) |
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| 2021-03-31 15:58:54 +0200 | malumore_ | (~malumore@151.62.117.70) |
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| 2021-03-31 16:02:26 +0200 | egwor | (520bc907@cpc110777-lewi20-2-0-cust262.2-4.cable.virginm.net) (Quit: Connection closed) |
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| 2021-03-31 16:06:59 +0200 | siers | ij |
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| 2021-03-31 16:11:26 +0200 | dandart | (~Thunderbi@home.dandart.co.uk) (Quit: dandart) |
| 2021-03-31 16:14:01 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Quit: Connection closed) |
| 2021-03-31 16:14:21 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
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| 2021-03-31 16:18:58 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 240 seconds) |
| 2021-03-31 16:19:00 +0200 | caubert | (~caubert@136.244.111.235) |
| 2021-03-31 16:21:47 +0200 | Neuromancer | (~Neuromanc@unaffiliated/neuromancer) (Read error: Connection reset by peer) |
| 2021-03-31 16:21:59 +0200 | Jd007 | (~Jd007@162.156.11.151) |
| 2021-03-31 16:22:31 +0200 | Guest41032 | (~laudiacay@67.176.215.84) |
| 2021-03-31 16:22:34 +0200 | motherfsck | (~motherfsc@unaffiliated/motherfsck) (Remote host closed the connection) |
| 2021-03-31 16:22:54 +0200 | ddellac__ | (ddellacost@gateway/vpn/mullvad/ddellacosta) (Ping timeout: 268 seconds) |
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| 2021-03-31 16:51:00 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
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| 2021-03-31 16:53:54 +0200 | maroloccio | (~marolocci@pousada3ja.mma.com.br) (Read error: Connection reset by peer) |
| 2021-03-31 16:55:30 +0200 | kritzefitz_ | (~kritzefit@212.86.56.80) |
| 2021-03-31 16:55:46 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 240 seconds) |
| 2021-03-31 16:56:24 +0200 | kritzefitz_ | (~kritzefit@212.86.56.80) (Client Quit) |
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| 2021-03-31 17:57:42 +0200 | solvr | (57e3c46d@87.227.196.109) (Ping timeout: 240 seconds) |
| 2021-03-31 17:58:09 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) (Remote host closed the connection) |
| 2021-03-31 17:58:10 +0200 | masterplain | (ce7fb161@ics177-97.icsincorporated.com) |
| 2021-03-31 17:58:51 +0200 | stree | (~stree@68.36.8.116) |
| 2021-03-31 17:59:59 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) |
| 2021-03-31 18:00:03 +0200 | joe[m]1 | (joemonoida@gateway/shell/matrix.org/x-ddskqwzpoidneuno) (Quit: Idle for 30+ days) |
| 2021-03-31 18:00:18 +0200 | geekosaur | (82650c7a@130.101.12.122) |
| 2021-03-31 18:00:28 +0200 | electricityZZZZ | (~electrici@135-180-3-82.static.sonic.net) |
| 2021-03-31 18:00:49 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 18:01:00 +0200 | solvr | (57e3c46d@87.227.196.109) |
| 2021-03-31 18:01:56 +0200 | ep1ctetus | (~epictetus@ip72-194-215-136.sb.sd.cox.net) (Ping timeout: 260 seconds) |
| 2021-03-31 18:03:06 +0200 | malumore_ | (~malumore@151.62.117.70) (Ping timeout: 240 seconds) |
| 2021-03-31 18:03:10 +0200 | jakalx | (~jakalx@base.jakalx.net) () |
| 2021-03-31 18:04:02 +0200 | solvr35 | (57e3c46d@87.227.196.109) (Ping timeout: 240 seconds) |
| 2021-03-31 18:04:34 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) (Ping timeout: 245 seconds) |
| 2021-03-31 18:04:45 +0200 | mouseghost | (~draco@wikipedia/desperek) (Quit: mew wew) |
| 2021-03-31 18:04:50 +0200 | ep1ctetus | (~epictetus@ip72-194-215-136.sb.sd.cox.net) |
| 2021-03-31 18:05:54 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 268 seconds) |
| 2021-03-31 18:05:55 +0200 | supercoven | (~Supercove@dsl-hkibng31-54fabd-233.dhcp.inet.fi) |
| 2021-03-31 18:07:51 +0200 | ezrakilty | (~ezrakilty@97-126-86-140.tukw.qwest.net) |
| 2021-03-31 18:15:43 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 18:17:26 +0200 | Tuplanolla | (~Tuplanoll@91-159-68-239.elisa-laajakaista.fi) |
| 2021-03-31 18:18:25 +0200 | xff0x | (~xff0x@2001:1a81:52d9:7900:4e7f:f403:b0b5:ef3) (Ping timeout: 250 seconds) |
| 2021-03-31 18:19:10 +0200 | xff0x | (~xff0x@2001:1a81:52d9:7900:15bf:3601:850c:fab3) |
| 2021-03-31 18:20:10 +0200 | ezrakilty | (~ezrakilty@97-126-86-140.tukw.qwest.net) (Remote host closed the connection) |
| 2021-03-31 18:20:46 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 240 seconds) |
| 2021-03-31 18:24:43 +0200 | malumore_ | (~malumore@151.62.117.70) |
| 2021-03-31 18:28:16 +0200 | fuzzy_id | (~user@1.red-88-0-41.dynamicip.rima-tde.net) |
| 2021-03-31 18:29:23 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) |
| 2021-03-31 18:30:20 +0200 | <fuzzy_id> | What's the lens way to apply a getter to a Maybe? |
| 2021-03-31 18:31:15 +0200 | <fuzzy_id> | i.e. an alternative for 'fmap (^. g) $ x ^. f' |
| 2021-03-31 18:31:30 +0200 | <fuzzy_id> | where 'x ^. f' is of type Maybe a |
| 2021-03-31 18:32:00 +0200 | <fuzzy_id> | I'm starring at prisms and my head is melting. :/ |
| 2021-03-31 18:32:42 +0200 | <kuribas> | fuzzy_id: traverse? |
| 2021-03-31 18:32:51 +0200 | Guest41032 | (~laudiacay@67.176.215.84) |
| 2021-03-31 18:33:49 +0200 | evanjs- | (~evanjs@075-129-098-007.res.spectrum.com) (Quit: ZNC 1.8.2 - https://znc.in) |
| 2021-03-31 18:33:50 +0200 | <kuribas> | > preview (_1 . traverse) (Just 3, "foo") |
| 2021-03-31 18:33:52 +0200 | <lambdabot> | Just 3 |
| 2021-03-31 18:34:00 +0200 | <kuribas> | or _Just |
| 2021-03-31 18:34:05 +0200 | <kuribas> | > preview (_1 . _Just) (Just 3, "foo") |
| 2021-03-31 18:34:07 +0200 | <lambdabot> | Just 3 |
| 2021-03-31 18:34:11 +0200 | chele | (~chele@ip5b40237d.dynamic.kabel-deutschland.de) |
| 2021-03-31 18:34:37 +0200 | <kuribas> | > tolistOf (_1 . traverse) (Just 3, "foo") |
| 2021-03-31 18:34:39 +0200 | <lambdabot> | error: |
| 2021-03-31 18:34:39 +0200 | <lambdabot> | • Variable not in scope: |
| 2021-03-31 18:34:39 +0200 | <lambdabot> | tolistOf |
| 2021-03-31 18:35:18 +0200 | <kuribas> | > toListOf (_1 . traverse) (Just 3, "foo") |
| 2021-03-31 18:35:20 +0200 | <lambdabot> | [3] |
| 2021-03-31 18:35:31 +0200 | <kuribas> | > toListOf (_1 . _Just) (Nothing, "foo") |
| 2021-03-31 18:35:32 +0200 | <lambdabot> | [] |
| 2021-03-31 18:36:10 +0200 | evanjs | (~evanjs@075-129-098-007.res.spectrum.com) |
| 2021-03-31 18:36:52 +0200 | <raehik> | fuzzy_id: using view and (<$>) might make it look nicer? |
| 2021-03-31 18:36:58 +0200 | Guest41032 | (~laudiacay@67.176.215.84) (Ping timeout: 240 seconds) |
| 2021-03-31 18:37:07 +0200 | <raehik> | > view _1 <$> (Just (1, 2)) |
| 2021-03-31 18:37:09 +0200 | <lambdabot> | Just 1 |
| 2021-03-31 18:37:26 +0200 | <raehik> | (apologies I don't do enough lenses to rewrite your example) |
| 2021-03-31 18:38:07 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) (Ping timeout: 258 seconds) |
| 2021-03-31 18:38:49 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 18:38:57 +0200 | Deide | (~Deide@217.155.19.23) |
| 2021-03-31 18:39:49 +0200 | <fuzzy_id> | raehik: Yeah, I guess I go with that. |
| 2021-03-31 18:40:05 +0200 | <fuzzy_id> | kuribas: tbh I don't have any idea how to apply your suggestions. :P |
| 2021-03-31 18:40:16 +0200 | <kuribas> | raehik: that only works if the Maybe is outer. |
| 2021-03-31 18:40:43 +0200 | <raehik> | yes |
| 2021-03-31 18:41:37 +0200 | solvr | (57e3c46d@87.227.196.109) (Quit: Connection closed) |
| 2021-03-31 18:41:37 +0200 | <kuribas> | raehik: give an example where you are failing? |
| 2021-03-31 18:42:48 +0200 | <raehik> | kuribas: I think you meant to tag fuzzy_id! |
| 2021-03-31 18:42:58 +0200 | <kuribas> | eh, right |
| 2021-03-31 18:43:19 +0200 | pavonia | (~user@unaffiliated/siracusa) |
| 2021-03-31 18:44:13 +0200 | gaff | (~user@49.207.224.136) |
| 2021-03-31 18:44:20 +0200 | <kuribas> | fuzzy_id: traverse targets all elements of a Traversable. _Just targets a maybe value if it is a Just. |
| 2021-03-31 18:44:27 +0200 | <kuribas> | fuzzy_id: which means the same thing in the end. |
| 2021-03-31 18:44:42 +0200 | <gaff> | i have some code pasted at https://pastebin.com/mBevWnT4 |
| 2021-03-31 18:44:57 +0200 | <kuribas> | fuzzy_id: also, since you may return no values, you need to use preview or toListOf. |
| 2021-03-31 18:45:20 +0200 | <kuribas> | fuzzy_id: because view always returns a value, but that doesn't work when the Maybe is Nothing. |
| 2021-03-31 18:45:50 +0200 | argento | (~argent0@191.81.225.82) |
| 2021-03-31 18:45:55 +0200 | average | (uid473595@gateway/web/irccloud.com/x-ygfxxolhucppzalr) |
| 2021-03-31 18:46:00 +0200 | <fuzzy_id> | Hmm. Let's see, I need something to fetch the 2 in 'x = (Just (1, 2), 3)' |
| 2021-03-31 18:46:38 +0200 | <kuribas> | > preview (_Just . _2) (Just (1, 2), 3) |
| 2021-03-31 18:46:40 +0200 | <lambdabot> | error: |
| 2021-03-31 18:46:40 +0200 | <lambdabot> | • Couldn't match type ‘(Maybe (a0, b1), b2)’ with ‘Maybe b0’ |
| 2021-03-31 18:46:40 +0200 | <lambdabot> | arising from a functional dependency between: |
| 2021-03-31 18:46:50 +0200 | <kuribas> | > preview (_1 . _Just . _2) (Just (1, 2), 3) |
| 2021-03-31 18:46:51 +0200 | <lambdabot> | Just 2 |
| 2021-03-31 18:46:59 +0200 | <kuribas> | > view (_1 . _Just . _2) (Just (1, 2), 3) |
| 2021-03-31 18:47:00 +0200 | <gaff> | basically, if the function is one module, the call works fine, but if the code is located in another module, it hangs. i am not sure why. |
| 2021-03-31 18:47:01 +0200 | <lambdabot> | error: |
| 2021-03-31 18:47:01 +0200 | <lambdabot> | • Ambiguous type variable ‘a0’ arising from a use of ‘show_M623296576548... |
| 2021-03-31 18:47:01 +0200 | <lambdabot> | prevents the constraint ‘(Show a0)’ from being solved. |
| 2021-03-31 18:47:13 +0200 | <kuribas> | > view (_1 . _Just . _2) (Just (1, 2), 3) :: Int |
| 2021-03-31 18:47:15 +0200 | <lambdabot> | error: |
| 2021-03-31 18:47:15 +0200 | <lambdabot> | • No instance for (Monoid Int) arising from a use of ‘_Just’ |
| 2021-03-31 18:47:15 +0200 | <lambdabot> | • In the first argument of ‘(.)’, namely ‘_Just’ |
| 2021-03-31 18:47:22 +0200 | masterplain | (ce7fb161@ics177-97.icsincorporated.com) (Changing host) |
| 2021-03-31 18:47:22 +0200 | masterplain | (ce7fb161@unaffiliated/sayo-) |
| 2021-03-31 18:47:41 +0200 | <kuribas> | fuzzy_id: so that fails, because view tries to collect all the results in a monoid, but the result isn't a monoid. |
| 2021-03-31 18:48:08 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 246 seconds) |
| 2021-03-31 18:48:37 +0200 | masterplain | (ce7fb161@unaffiliated/sayo-) () |
| 2021-03-31 18:48:46 +0200 | <kuribas> | fuzzy_id: it's a detail which you may forget :) Just remember that view can only be used if you always return a value. |
| 2021-03-31 18:48:53 +0200 | <gaff> | it is quite strange behaviour. |
| 2021-03-31 18:49:33 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) |
| 2021-03-31 18:50:37 +0200 | <fuzzy_id> | kuribas: ok. that clearifies things a bit. |
| 2021-03-31 18:50:39 +0200 | <fuzzy_id> | I guess. |
| 2021-03-31 18:51:29 +0200 | <kuribas> | fuzzy_id: preview return (Just x), where x is the first value, or Nothing, when there are no values. |
| 2021-03-31 18:51:36 +0200 | chele | (~chele@ip5b40237d.dynamic.kabel-deutschland.de) (Remote host closed the connection) |
| 2021-03-31 18:51:40 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:7ca5:80cc:e540:ad18) (Quit: My MacBook has gone to sleep. ZZZzzz…) |
| 2021-03-31 18:51:52 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 18:51:56 +0200 | <ski> | gaff : what if you change from using `i' in `Integral', to using `Integer' ? |
| 2021-03-31 18:53:03 +0200 | <gaff> | well, i haven't tried that, but how would it affect which module the code lives? |
| 2021-03-31 18:53:22 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 18:53:24 +0200 | <gaff> | also, for smaller inputs, things work just fine. |
| 2021-03-31 18:53:43 +0200 | <geekosaur> | gaff, inlining will vary depending on where the code is |
| 2021-03-31 18:53:57 +0200 | <geekosaur> | among other things |
| 2021-03-31 18:54:05 +0200 | cheater | (~user@unaffiliated/cheater) (Ping timeout: 246 seconds) |
| 2021-03-31 18:54:07 +0200 | <geekosaur> | and specialisation |
| 2021-03-31 18:54:12 +0200 | <gaff> | i see |
| 2021-03-31 18:54:35 +0200 | <gaff> | that's a nasty surprise. |
| 2021-03-31 18:54:39 +0200 | <ski> | gaff : it could possibly affect efficiency |
| 2021-03-31 18:54:44 +0200 | cheater | (~user@unaffiliated/cheater) |
| 2021-03-31 18:54:54 +0200 | kuribas | (~user@ptr-25vy0i8a26pq5ck0xjc.18120a2.ip6.access.telenet.be) (Quit: ERC (IRC client for Emacs 26.3)) |
| 2021-03-31 18:55:30 +0200 | <fuzzy_id> | kuribas: thanks a lot. I guess I just have to sit down and study lenses properly. |
| 2021-03-31 18:55:32 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) |
| 2021-03-31 18:55:32 +0200 | <ski> | in any case, using a constrained polymorphic `primes' like that is probably not that good, in the first place |
| 2021-03-31 18:56:10 +0200 | <ski> | (i guess possibly it floats the instantiation out of the lambda) |
| 2021-03-31 18:56:20 +0200 | jakalx | (~jakalx@base.jakalx.net) |
| 2021-03-31 18:58:46 +0200 | conal | (~conal@64.71.133.70) (Ping timeout: 240 seconds) |
| 2021-03-31 18:59:59 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) (Ping timeout: 245 seconds) |
| 2021-03-31 18:59:59 +0200 | <gaff> | ski: that works! i changed it to INT |
| 2021-03-31 19:00:17 +0200 | conal | (~conal@64.71.133.70) |
| 2021-03-31 19:00:26 +0200 | <ski> | gaff : because, now `primes' is shared |
| 2021-03-31 19:00:29 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 19:01:10 +0200 | <gaff> | ski: i din't catch you. shared? |
| 2021-03-31 19:01:29 +0200 | <ski> | gaff : probably, with `dff', it didn't really hang indefinitely, just took a very long time (possibly exponentially slower), while `df' didn't experience that, due to inlining or specialization or so happening, because it was in the same module |
| 2021-03-31 19:01:51 +0200 | <gaff> | ok |
| 2021-03-31 19:02:11 +0200 | <gaff> | and why is it working when i change it to INT, as you suggested? |
| 2021-03-31 19:02:25 +0200 | <ski> | gaff : with lazy / by-need evaluation, if you do `let x = 2 + 3 in x * x', then the computation of `2 * 3' is shared, so that it's not redone, when the value of the second `x' in `x * x' is demanded |
| 2021-03-31 19:02:50 +0200 | <gaff> | correct. |
| 2021-03-31 19:02:59 +0200 | Neuromancer | (~Neuromanc@unaffiliated/neuromancer) |
| 2021-03-31 19:03:28 +0200 | <ski> | such a memoization/sharing does not happen, if you have a function. if you write `f x = 2 + 3', then `f 4 * f 4' won't share the result of `2 + 3', under by-need |
| 2021-03-31 19:03:54 +0200 | <gaff> | i see |
| 2021-03-31 19:04:20 +0200 | <ski> | there is no automatic memoization, caching of an association from input values to output values (such a thing would require some kind of equality check on inputs. also there's other possible issues ..) |
| 2021-03-31 19:04:25 +0200 | <ski> | however |
| 2021-03-31 19:04:29 +0200 | <ski> | if you have |
| 2021-03-31 19:04:45 +0200 | <ski> | counting :: Integer i => [i] |
| 2021-03-31 19:04:58 +0200 | <ski> | counting = 0 : map (1 +) counting |
| 2021-03-31 19:05:43 +0200 | <ski> | even though it *looks* like `counting' would be shared here, it won't. because, under the dictionary-passing translation (/ implementation) of type classes, this will correspond to something like |
| 2021-03-31 19:06:01 +0200 | <ski> | counting :: IntegralDict i -> [i] |
| 2021-03-31 19:06:43 +0200 | <ski> | counting iDict = fromInteger iDict (0 :: Integer) : map ((+) iDict (fromInteger iDict (1 :: Integer))) (counting iDict) |
| 2021-03-31 19:06:57 +0200 | <ski> | (sorry, obviously `Integer i' should have been `Integral i') |
| 2021-03-31 19:07:14 +0200 | <gaff> | yeah, i was wondering about that |
| 2021-03-31 19:07:32 +0200 | <ski> | where `IntegralDict i' is a data type, a record of implementations of the methods of `Integral' (and superclasses), for `i' |
| 2021-03-31 19:07:44 +0200 | <gaff> | i see |
| 2021-03-31 19:07:53 +0200 | <ski> | so, "secretly", under this implementation, `counting' will be a function. so, no sharing |
| 2021-03-31 19:08:00 +0200 | <ski> | this is the reason for the DMR existing |
| 2021-03-31 19:08:03 +0200 | <gaff> | i see |
| 2021-03-31 19:09:35 +0200 | <ski> | if you had skipped the type signature on `counting' or `primes', then you'd either gotten an error that it was ambiguous (it refusing to infer it as a *constrained* polymorphic operation), or else it might have picked a default type for `i' (like `Integer'), in case one was available (and then your operation would be monomorphic) |
| 2021-03-31 19:10:06 +0200 | <gaff> | okay |
| 2021-03-31 19:10:07 +0200 | <ski> | (in this case, i think you'd get the defaulting .. but in general, it might not find a suitable default, and so it would complain) |
| 2021-03-31 19:10:08 +0200 | zfnmxt | (~zfnmxt@unaffiliated/zfnmxt) (Quit: Bye!) |
| 2021-03-31 19:10:15 +0200 | zfnmxt_ | (~zfnmxt@unaffiliated/zfnmxt) |
| 2021-03-31 19:10:19 +0200 | Jello_Raptor | (~Jello_Rap@li641-12.members.linode.com) (Ping timeout: 252 seconds) |
| 2021-03-31 19:10:46 +0200 | <gaff> | so in this case, when i cahnge to `INT`, `primes` get shared? |
| 2021-03-31 19:10:53 +0200 | CitizenSnips | (~CitizenSn@irc.refl.club) (Quit: ZNC 1.8.2 - https://znc.in) |
| 2021-03-31 19:10:54 +0200 | fredcy| | (fredcy@2600:3c00::f03c:91ff:feae:15ae) (Quit: ZNC - http://znc.in) |
| 2021-03-31 19:11:04 +0200 | fredcy | (fredcy@2600:3c00::f03c:91ff:feae:15ae) |
| 2021-03-31 19:11:08 +0200 | <gaff> | sorry, *change* |
| 2021-03-31 19:12:20 +0200 | CitizenSnips | (~CitizenSn@irc.refl.club) |
| 2021-03-31 19:12:20 +0200 | <ski> | (the way to avoid dealing with DMR is to either (a) add an explicit type signature, signalling that you're aware that it's *constrained* polymorphic (so no sharing); or (b), in case it's a function, add explicit parameter to the left of `='. so instead of `f = ...' do `f x = (...) x', or instead of `f = \x -> ..x..', do `f x = ..x..'; or (c) turn off DMR (but then you don't get warned by it, when you lose |
| 2021-03-31 19:12:26 +0200 | <ski> | sharing like this)) |
| 2021-03-31 19:12:28 +0200 | <ski> | gaff : yes |
| 2021-03-31 19:13:10 +0200 | <ski> | if you load the module, then do `take 4 primes', it will show the primes under ten |
| 2021-03-31 19:13:12 +0200 | Jello_Raptor | (~Jello_Rap@li641-12.members.linode.com) |
| 2021-03-31 19:13:25 +0200 | <gaff> | yes |
| 2021-03-31 19:13:47 +0200 | <ski> | if you then do `take 25 primes', it will show the primes under one hundred, but not recompute the first four, sharing them from the previous computation, only recomputing the remaining twentyone |
| 2021-03-31 19:14:14 +0200 | <ski> | with `primes' constrained polymorphic, you'll recompute each time. at least under a naïve by-need / lazy implementation |
| 2021-03-31 19:14:17 +0200 | Forlorn_ | (~Forlorn@unaffiliated/forlorn) |
| 2021-03-31 19:14:26 +0200 | <gaff> | i see |
| 2021-03-31 19:14:41 +0200 | <ski> | and then, each call to one of your operations using `primes' would recompute it from the start again, each time it used it |
| 2021-03-31 19:14:49 +0200 | <gaff> | correct |
| 2021-03-31 19:15:28 +0200 | <ski> | i think even each recursive call might recompute it (unless it does `let'-floating of the specialization to `i') .. and this could likely cause exponential worsening of time |
| 2021-03-31 19:15:44 +0200 | __monty__ | (~toonn@unaffiliated/toonn) |
| 2021-03-31 19:16:16 +0200 | <ski> | however, it seemed to happen that with `df' in the same module, it managed to, in that case, avoid this. probably due to specialization, and possibly also inlining. but it didn't manage to do that with `dff' in a different module |
| 2021-03-31 19:16:31 +0200 | <ski> | that's my theory about the behaviour you observed, anyway |
| 2021-03-31 19:16:39 +0200 | <gaff> | ski: primes is shared because it is not a function, is suppose? |
| 2021-03-31 19:16:46 +0200 | <ski> | if you're curious, you could dive into core, or profile, or so |
| 2021-03-31 19:16:49 +0200 | <ski> | yep |
| 2021-03-31 19:16:57 +0200 | <gaff> | reasoning from your statements |
| 2021-03-31 19:18:35 +0200 | <gaff> | ski: i am not familiar with `DMR`. what does it stand for, in full? |
| 2021-03-31 19:18:36 +0200 | <ski> | it's like if you had said `isPrime n = ..n.. where primes = ...', or `isPrime n = let primes = ... in ..n..' (or, in the `let'-floating case, it would be `isPrime = let primes = ... in \n -> ..n..', which would share `primes' over the body of `isPrime', but not across calls to it. i guess whether it would share among recursive calls depends on whether it would float it out of the recursion or not) |
| 2021-03-31 19:19:11 +0200 | <geekosaur> | "dreaded monomorphism restriction" |
| 2021-03-31 19:19:35 +0200 | <gaff> | ah, i know that, just didn't know the abbreviation. |
| 2021-03-31 19:19:45 +0200 | <geekosaur> | "monomorphism restriction" is its proper name. "dreaded" is more or less because of this :) |
| 2021-03-31 19:20:01 +0200 | <gaff> | i see |
| 2021-03-31 19:20:37 +0200 | <ski> | (also, in actuality, it would probably be more like `isPrime @i n = ..i..n.. where myPrimes = primes @i', where `primes' is the polymorphic one, defined on the top-level, and `myPrimes' is the specialization of it, to the particular type `i' (with corresponding `Integral' instance dictionary) that was used for this particular call to `isPrime') |
| 2021-03-31 19:21:14 +0200 | <gaff> | i see |
| 2021-03-31 19:21:59 +0200 | <ski> | (so that `isPrime @i n = ..i..n.. where myPrimes = primes @i' would then be translated into `isPrime @i iDict n = ..i..n.. where myPrimes = primes @i iDict', passing the dictionary to `primes' to get the resulting list, then sharing that list, by naming it `myPrimes' and reusing that name) |
| 2021-03-31 19:22:03 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:4485:5098:cb7a:cbe1) |
| 2021-03-31 19:22:26 +0200 | <gaff> | ah |
| 2021-03-31 19:23:08 +0200 | <ski> | anyway, i'm not totally sure on the details that it actually does. but it could do something along these lines |
| 2021-03-31 19:24:20 +0200 | <gaff> | ski: using rank types does entail a performance cost sometimes. |
| 2021-03-31 19:24:55 +0200 | <gaff> | in this case, at least, for example. |
| 2021-03-31 19:26:56 +0200 | <ski> | there's no higher-rank stuff here |
| 2021-03-31 19:27:18 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 240 seconds) |
| 2021-03-31 19:27:27 +0200 | <ski> | the performance related stuff here is about the class constraints, implemented by passing dictionaries |
| 2021-03-31 19:27:38 +0200 | <gaff> | i see |
| 2021-03-31 19:27:50 +0200 | <ski> | (and how that precludes the sharing of results) |
| 2021-03-31 19:27:57 +0200 | <gaff> | okay, i will have to remember that |
| 2021-03-31 19:28:05 +0200 | jamm_ | (~jamm@unaffiliated/jamm) |
| 2021-03-31 19:28:45 +0200 | <gaff> | this problem came as a surprise to me. i have never seen it before. |
| 2021-03-31 19:29:05 +0200 | <gaff> | i suppose that's things come to you when you are young |
| 2021-03-31 19:30:03 +0200 | <gaff> | ski: thanks much. appreciate your help, indeed. |
| 2021-03-31 19:30:34 +0200 | dyeplexer | (~lol@unaffiliated/terpin) |
| 2021-03-31 19:30:48 +0200 | <ski> | np |
| 2021-03-31 19:32:12 +0200 | jamm_ | (~jamm@unaffiliated/jamm) (Ping timeout: 246 seconds) |
| 2021-03-31 19:32:35 +0200 | <gaff> | ski: one way i could track this kind of stuff is to load the code in ghci and step through it line by line. |
| 2021-03-31 19:32:47 +0200 | <ski> | i guess |
| 2021-03-31 19:32:54 +0200 | <gaff> | ah |
| 2021-03-31 19:33:27 +0200 | MartinR23 | (d9f579b1@pd9f579b1.dip0.t-ipconnect.de) |
| 2021-03-31 19:33:43 +0200 | <ski> | one can learn to watch out for things that are intended to be shared, but are overloaded |
| 2021-03-31 19:34:10 +0200 | <ski> | (or, at least, to relatively quickly realize that could be the culprit, in the case of a problem) |
| 2021-03-31 19:34:37 +0200 | <gaff> | also, the thought of changing the type to INT came to me earlier, but i, for some reason, dismissed it without checking it out. |
| 2021-03-31 19:34:54 +0200 | <gaff> | i see |
| 2021-03-31 19:35:16 +0200 | <gaff> | nice tips. thanks |
| 2021-03-31 19:35:58 +0200 | <gaff> | despite these issues, i love writing code in haskell. it is so elegant. |
| 2021-03-31 19:38:52 +0200 | borne | (~fritjof@200116b86411e500f7ed9fd86a2491f0.dip.versatel-1u1.de) (Ping timeout: 276 seconds) |
| 2021-03-31 19:40:12 +0200 | gaff | (~user@49.207.224.136) (Quit: ERC (IRC client for Emacs 27.1)) |
| 2021-03-31 19:41:33 +0200 | DTZUZU | (~DTZUZO@205.ip-149-56-132.net) |
| 2021-03-31 19:44:05 +0200 | jakalx | (~jakalx@base.jakalx.net) ("Error from remote client") |
| 2021-03-31 19:44:34 +0200 | DTZUZU_ | (~DTZUZO@207.81.119.43) (Ping timeout: 268 seconds) |
| 2021-03-31 19:44:47 +0200 | gehmehgeh | (~ircuser1@gateway/tor-sasl/gehmehgeh) (Quit: Leaving) |
| 2021-03-31 19:45:10 +0200 | argento | (~argent0@191.81.225.82) (Ping timeout: 268 seconds) |
| 2021-03-31 19:51:22 +0200 | geekosaur | (82650c7a@130.101.12.122) (Ping timeout: 240 seconds) |
| 2021-03-31 19:52:11 +0200 | isBEKaml | (~isBEKaml@unaffiliated/isbekaml) |
| 2021-03-31 19:54:00 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 252 seconds) |
| 2021-03-31 19:54:22 +0200 | gitgood | (~gitgood@80-44-12-39.dynamic.dsl.as9105.com) |
| 2021-03-31 19:55:02 +0200 | DTZUZU_ | (~DTZUZO@205.ip-149-56-132.net) |
| 2021-03-31 19:55:39 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 19:55:41 +0200 | fuzzy_id | (~user@1.red-88-0-41.dynamicip.rima-tde.net) (Ping timeout: 260 seconds) |
| 2021-03-31 19:55:47 +0200 | DTZUZU | (~DTZUZO@205.ip-149-56-132.net) (Read error: Connection reset by peer) |
| 2021-03-31 19:56:15 +0200 | TheMule | (~TheMule@aftr-37-201-195-154.unity-media.net) |
| 2021-03-31 19:56:20 +0200 | TheMule | (~TheMule@aftr-37-201-195-154.unity-media.net) (Client Quit) |
| 2021-03-31 19:56:20 +0200 | gitgood | (~gitgood@80-44-12-39.dynamic.dsl.as9105.com) (Client Quit) |
| 2021-03-31 19:56:26 +0200 | cole-h | (~cole-h@c-73-48-197-220.hsd1.ca.comcast.net) |
| 2021-03-31 19:58:35 +0200 | frozenErebus | (~frozenEre@37.231.244.249) |
| 2021-03-31 19:58:45 +0200 | Guest41032 | (~laudiacay@67.176.215.84) |
| 2021-03-31 19:59:20 +0200 | gitgood | (~gitgood@80-44-12-39.dynamic.dsl.as9105.com) |
| 2021-03-31 19:59:32 +0200 | MartinR23 | (d9f579b1@pd9f579b1.dip0.t-ipconnect.de) (Quit: Connection closed) |
| 2021-03-31 20:01:02 +0200 | DTZUZU_ | DTZUZU |
| 2021-03-31 20:01:13 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 268 seconds) |
| 2021-03-31 20:02:19 +0200 | mouseghost | (~draco@wikipedia/desperek) |
| 2021-03-31 20:03:33 +0200 | frozenErebus | (~frozenEre@37.231.244.249) (Ping timeout: 260 seconds) |
| 2021-03-31 20:04:43 +0200 | <Uniaika> | MrMobius: |
| 2021-03-31 20:04:43 +0200 | mrlazos | (~mrlazos@46-44-92.adsl.cyta.gr) (Read error: Connection reset by peer) |
| 2021-03-31 20:04:47 +0200 | <Uniaika> | woops, sorry! |
| 2021-03-31 20:05:28 +0200 | mrlazos | (~mrlazos@46-44-92.adsl.cyta.gr) |
| 2021-03-31 20:06:14 +0200 | mrlazos | (~mrlazos@46-44-92.adsl.cyta.gr) (Remote host closed the connection) |
| 2021-03-31 20:06:49 +0200 | borne | (~fritjof@200116b86411e500f7ed9fd86a2491f0.dip.versatel-1u1.de) |
| 2021-03-31 20:06:50 +0200 | Guest41032 | (~laudiacay@67.176.215.84) (Ping timeout: 260 seconds) |
| 2021-03-31 20:06:50 +0200 | stree | (~stree@68.36.8.116) (Ping timeout: 260 seconds) |
| 2021-03-31 20:06:53 +0200 | bodisiw | (~bodiskw@cpe-74-138-114-237.kya.res.rr.com) (Quit: Leaving) |
| 2021-03-31 20:07:27 +0200 | isBEKaml | (~isBEKaml@unaffiliated/isbekaml) () |
| 2021-03-31 20:07:53 +0200 | geekosaur | (82650c7a@130.101.12.122) |
| 2021-03-31 20:08:12 +0200 | TheMule | (~TheMule@2a02:908:3a3:8660:e095:501c:2700:5d7c) |
| 2021-03-31 20:10:25 +0200 | conal | (~conal@64.71.133.70) (Quit: Computer has gone to sleep.) |
| 2021-03-31 20:10:55 +0200 | TheMule | (~TheMule@2a02:908:3a3:8660:e095:501c:2700:5d7c) (Client Quit) |
| 2021-03-31 20:11:23 +0200 | TheMule | (~TheMule@aftr-37-201-195-154.unity-media.net) |
| 2021-03-31 20:11:39 +0200 | dyeplexer | (~lol@unaffiliated/terpin) (Remote host closed the connection) |
| 2021-03-31 20:11:56 +0200 | TheMule | mkDoku |
| 2021-03-31 20:12:13 +0200 | conal | (~conal@64.71.133.70) |
| 2021-03-31 20:12:26 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection) |
| 2021-03-31 20:12:39 +0200 | rajivr | (uid269651@gateway/web/irccloud.com/x-vhalmegvcwkpzygm) (Quit: Connection closed for inactivity) |
| 2021-03-31 20:19:05 +0200 | __minoru__shirae | (~shiraeesh@109.166.57.243) (Ping timeout: 268 seconds) |
| 2021-03-31 20:19:45 +0200 | Pickchea | (~private@unaffiliated/pickchea) |
| 2021-03-31 20:19:58 +0200 | vicfred | (~vicfred@unaffiliated/vicfred) |
| 2021-03-31 20:20:07 +0200 | stree | (~stree@68.36.8.116) |
| 2021-03-31 20:22:36 +0200 | <tomsmeding> | Under what conditions is a ByteString null-terminated? |
| 2021-03-31 20:23:03 +0200 | Sgeo_ | (~Sgeo@ool-18b98aa4.dyn.optonline.net) |
| 2021-03-31 20:23:24 +0200 | <tomsmeding> | as in: does bytestring itself null-terminate things sometimes, or is this always the user's task? |
| 2021-03-31 20:24:18 +0200 | Sgeo__ | (~Sgeo@ool-18b98aa4.dyn.optonline.net) |
| 2021-03-31 20:24:55 +0200 | olle | (~olle@i5E8666BD.versanet.de) |
| 2021-03-31 20:24:57 +0200 | <tomsmeding> | context: snap-core defines this function: https://hackage.haskell.org/package/snap-core-1.0.4.2/docs/src/Snap.Internal.Http.Types.html#parse… |
| 2021-03-31 20:25:12 +0200 | <olle> | Question: Is exceptions in Haskell a regular monad? Or does it have some extras built in? |
| 2021-03-31 20:25:17 +0200 | <olle> | Are* |
| 2021-03-31 20:25:57 +0200 | <tomsmeding> | S.unsafeUseAsCString (where S = Data.ByteString.Unsafe) requires that the bytestring is null-terminated, but my application is crashing (segfault) within the C function called here and I'm not sure how to debug why |
| 2021-03-31 20:26:34 +0200 | <tomsmeding> | olle: are you talking about ExceptT, or something else? |
| 2021-03-31 20:27:04 +0200 | <geekosaur> | I'd expect it to be the user's job, since it may be e.g. part of a network stream |
| 2021-03-31 20:27:06 +0200 | Sgeo | (~Sgeo@ool-18b98aa4.dyn.optonline.net) (Ping timeout: 268 seconds) |
| 2021-03-31 20:27:07 +0200 | <geekosaur> | fwiw |
| 2021-03-31 20:27:11 +0200 | <olle> | tomsmeding: dunno |
| 2021-03-31 20:27:12 +0200 | <tomsmeding> | also not sure what you mean with "extras"; every monad implements some kind of functionality apart from supporting 'return' and '>>=' |
| 2021-03-31 20:27:20 +0200 | <tomsmeding> | except I guess Identity |
| 2021-03-31 20:27:34 +0200 | <tomsmeding> | geekosaur: that's what I'd think too |
| 2021-03-31 20:27:34 +0200 | <olle> | tomsmeding: extras = special language support that makes it different than any other monad |
| 2021-03-31 20:27:43 +0200 | <tomsmeding> | olle: if you're talking about ExceptT, no |
| 2021-03-31 20:27:51 +0200 | <olle> | alright |
| 2021-03-31 20:28:06 +0200 | Sgeo_ | (~Sgeo@ool-18b98aa4.dyn.optonline.net) (Ping timeout: 252 seconds) |
| 2021-03-31 20:28:08 +0200 | <olle> | Is there a concsensus in Haskell community of which error handling design pattern is best? |
| 2021-03-31 20:28:20 +0200 | <tomsmeding> | olle: reason why I'm asking: haskell also has IO exceptions and asynchronous exceptions, which are two different things that are also different from ExceptT, and both are not monads at all :p |
| 2021-03-31 20:28:21 +0200 | <olle> | Exceptions vs result types, etc |
| 2021-03-31 20:28:29 +0200 | <olle> | tomsmeding: oh? |
| 2021-03-31 20:28:34 +0200 | <tomsmeding> | "Is there a consensus in Haskell community of " -- no |
| 2021-03-31 20:28:40 +0200 | <olle> | ^^ |
| 2021-03-31 20:28:49 +0200 | <Uniaika> | olle: my own consensus is that MonadError is great |
| 2021-03-31 20:28:56 +0200 | <Uniaika> | if you handle business data-types |
| 2021-03-31 20:29:05 +0200 | <tomsmeding> | well that may be overstating the case, but there are many different opinions about many different things |
| 2021-03-31 20:29:09 +0200 | <Uniaika> | when it comes to file-system, network, etc, then Exceptions are a better way to go |
| 2021-03-31 20:29:16 +0200 | <olle> | OK |
| 2021-03-31 20:31:01 +0200 | <tomsmeding> | new question: if I define a local library with the name 'foo' in my cabal.project, will that shadow any 'foo' from hackage in the dependencies of my dependencies? |
| 2021-03-31 20:31:12 +0200 | <tomsmeding> | (foo = snap-core >:D) |
| 2021-03-31 20:32:00 +0200 | argento | (~argent0@191.81.225.82) |
| 2021-03-31 20:32:00 +0200 | acidjnk_new | (~acidjnk@p200300d0c72b95486cfd1d07fe22841d.dip0.t-ipconnect.de) |
| 2021-03-31 20:33:54 +0200 | <geekosaur> | I think it's supposed to. It did here, at least |
| 2021-03-31 20:34:05 +0200 | <tomsmeding> | thanks! |
| 2021-03-31 20:35:01 +0200 | <tomsmeding> | reason why I'm asking: ircbrowse is crashing, like, often |
| 2021-03-31 20:35:55 +0200 | <tomsmeding> | like, a total of 7700 times in the past two months |
| 2021-03-31 20:36:04 +0200 | viluon | (uid453725@gateway/web/irccloud.com/x-uyquvhnfkmiqllxw) (Quit: Connection closed for inactivity) |
| 2021-03-31 20:36:18 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) |
| 2021-03-31 20:36:19 +0200 | <geekosaur> | I had wondered why 502 Bad Gateway was so relatively common… |
| 2021-03-31 20:36:35 +0200 | <tomsmeding> | >.> |
| 2021-03-31 20:37:05 +0200 | <geekosaur> | I think most of the time that would show up as a link time error, though, not as a crash. At least if it exposes any of the ABI |
| 2021-03-31 20:37:06 +0200 | <tomsmeding> | for some reason I never looked in my core dump log; I assumed it was an uncommon occurrence |
| 2021-03-31 20:37:14 +0200 | <tomsmeding> | link time error? |
| 2021-03-31 20:38:02 +0200 | <geekosaur> | either duplicate symbols, or if it exposes any of the ABI at Haskell level then a compile time error showing two apparently identical types as not matching |
| 2021-03-31 20:38:06 +0200 | cr3 | (~cr3@192-222-143-195.qc.cable.ebox.net) (Ping timeout: 240 seconds) |
| 2021-03-31 20:38:36 +0200 | <tomsmeding> | I'm talking about a segfault in C that comes seems to come from a null pointer dereference |
| 2021-03-31 20:38:56 +0200 | <tomsmeding> | and I'm not trusting that unsafeUseAsCString, but maybe I'm mistaken |
| 2021-03-31 20:39:09 +0200 | <tomsmeding> | (the crash seems to always be in that C function c_parse_http_time) |
| 2021-03-31 20:39:40 +0200 | conal | (~conal@64.71.133.70) (Read error: Connection reset by peer) |
| 2021-03-31 20:39:50 +0200 | <geekosaur> | that doesn't sound like missing \0, to be honest |
| 2021-03-31 20:39:59 +0200 | <geekosaur> | don't confuse \NUL with null pointers |
| 2021-03-31 20:40:03 +0200 | Alleria__ | (~textual@mskresolve-a.mskcc.org) (Ping timeout: 268 seconds) |
| 2021-03-31 20:40:08 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Quit: Connection closed) |
| 2021-03-31 20:40:10 +0200 | Sgeo_ | (~Sgeo@ool-18b98aa4.dyn.optonline.net) |
| 2021-03-31 20:40:19 +0200 | <tomsmeding> | very true |
| 2021-03-31 20:40:27 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 20:40:45 +0200 | <tomsmeding> | can unsafeUseAsCString every provide a null pointer? |
| 2021-03-31 20:40:47 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) (Ping timeout: 258 seconds) |
| 2021-03-31 20:41:33 +0200 | <geekosaur> | I don't think so, unless maybe it was fed one |
| 2021-03-31 20:41:40 +0200 | lawid_ | (~quassel@ipservice-092-219-052-236.092.219.pools.vodafone-ip.de) (Ping timeout: 252 seconds) |
| 2021-03-31 20:42:17 +0200 | <tomsmeding> | I'm going to instrument the C function anyway |
| 2021-03-31 20:42:39 +0200 | <tomsmeding> | the coredumps tell me precious little without going through the pages of assembly listing in strptime() |
| 2021-03-31 20:42:45 +0200 | lawid | (~quassel@dslb-178-005-075-217.178.005.pools.vodafone-ip.de) |
| 2021-03-31 20:42:54 +0200 | <geekosaur> | but it shouldn't be possible to feed it one since you're feeding it a ByteArray# allocated by the bytestring package, and if that's generating null pointers I'd expect a lot more to break |
| 2021-03-31 20:43:45 +0200 | Sgeo__ | (~Sgeo@ool-18b98aa4.dyn.optonline.net) (Ping timeout: 268 seconds) |
| 2021-03-31 20:44:14 +0200 | <geekosaur> | hm. you may need to initialize the locale |
| 2021-03-31 20:44:40 +0200 | conal | (~conal@64.71.133.70) |
| 2021-03-31 20:45:06 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 240 seconds) |
| 2021-03-31 20:46:20 +0200 | howdoi | (uid224@gateway/web/irccloud.com/x-qufpuczcdkidmfvl) |
| 2021-03-31 20:47:36 +0200 | <tomsmeding> | running the function on sane input from 'cabal repl' works on my server, so I'm not sure it's an environment problem |
| 2021-03-31 20:50:13 +0200 | Alleria | (~textual@zrcout.mskcc.org) |
| 2021-03-31 20:50:19 +0200 | _fcntl | (~jaroslawj@185.234.208.208.r.toneticgroup.pl) |
| 2021-03-31 20:50:21 +0200 | cr3 | (~cr3@192-222-143-195.qc.cable.ebox.net) |
| 2021-03-31 20:50:37 +0200 | Alleria | Guest90523 |
| 2021-03-31 20:51:32 +0200 | lampowner | (~xblow@2a02:2168:b03:3b74::1) |
| 2021-03-31 20:53:52 +0200 | <tomsmeding> | (in any case it seems my server's system locale is C.UTF-8) |
| 2021-03-31 20:55:08 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 20:55:26 +0200 | geekosaur | wonders if that's the problem. it may not be fully set up, since that's a somewhat weird-looking locale |
| 2021-03-31 20:56:08 +0200 | <geekosaur> | I'd use either C or en_US.UTF-8, not a combination of the two that might be half specified or something |
| 2021-03-31 20:56:18 +0200 | tomsmeding | doesn't remember changing it from the ubuntu default |
| 2021-03-31 20:57:22 +0200 | <tomsmeding> | then again, a segfault in an http time parsing function that only occurs sometimes? |
| 2021-03-31 20:57:28 +0200 | <geekosaur> | /etc/default/locale here is en_US.UTF-8 fwiw |
| 2021-03-31 20:57:33 +0200 | <tomsmeding> | s/segfault/null pointer dereference/ |
| 2021-03-31 20:57:54 +0200 | <geekosaur> | I dunno, I'm spitballing since I don't have enough information |
| 2021-03-31 20:58:19 +0200 | <tomsmeding> | thanks anyway :) |
| 2021-03-31 20:58:28 +0200 | <tomsmeding> | I'm going to try some instrumentation |
| 2021-03-31 20:59:00 +0200 | <geekosaur> | and strptime() uses locale stuff heavily |
| 2021-03-31 20:59:49 +0200 | <tomsmeding> | hm good point |
| 2021-03-31 21:01:01 +0200 | vicfred | (~vicfred@unaffiliated/vicfred) (Quit: Leaving) |
| 2021-03-31 21:01:10 +0200 | <tomsmeding> | changed locale to en_US.UTF-8 and restarted ircbrowse, let's first see if this fixes things |
| 2021-03-31 21:01:56 +0200 | Erutuon_ | (~Erutuon@97-116-27-119.mpls.qwest.net) |
| 2021-03-31 21:02:41 +0200 | lawid | (~quassel@dslb-178-005-075-217.178.005.pools.vodafone-ip.de) (Ping timeout: 265 seconds) |
| 2021-03-31 21:02:58 +0200 | jakalx | (~jakalx@base.jakalx.net) |
| 2021-03-31 21:05:20 +0200 | dpl_ | (~dpl@77.121.78.163) |
| 2021-03-31 21:07:10 +0200 | sord937 | (~sord937@gateway/tor-sasl/sord937) (Quit: sord937) |
| 2021-03-31 21:12:46 +0200 | mkDoku | (~TheMule@aftr-37-201-195-154.unity-media.net) (Ping timeout: 240 seconds) |
| 2021-03-31 21:14:09 +0200 | aarvar | (~foewfoiew@2601:602:a080:fa0:906c:b23f:e55d:e8aa) (Ping timeout: 245 seconds) |
| 2021-03-31 21:14:54 +0200 | <_fcntl> | wanted to play with ghc hacking, followed docs, bet on docker and got image that is based on project which is 1.5yo... does anyone use docker for ghc hacking? |
| 2021-03-31 21:17:29 +0200 | olle | (~olle@i5E8666BD.versanet.de) () |
| 2021-03-31 21:18:18 +0200 | <Clint> | what? |
| 2021-03-31 21:19:06 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 21:19:11 +0200 | larryba | (~bc8134e3@199.204.85.195) |
| 2021-03-31 21:19:47 +0200 | molehillish | (~molehilli@2600:8800:8d06:1800:49e2:dd02:cb68:846) |
| 2021-03-31 21:21:17 +0200 | kenran | (~kenran@mue-88-130-62-062.dsl.tropolys.de) |
| 2021-03-31 21:21:48 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) (Read error: Connection reset by peer) |
| 2021-03-31 21:21:56 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) |
| 2021-03-31 21:23:46 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 260 seconds) |
| 2021-03-31 21:25:53 +0200 | <tomsmeding> | hm? |
| 2021-03-31 21:26:45 +0200 | <tomsmeding> | _fcntl: I think most people working on ghc just checkout the git repository directly on their machine and work in that |
| 2021-03-31 21:26:46 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) (Ping timeout: 252 seconds) |
| 2021-03-31 21:27:25 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection) |
| 2021-03-31 21:27:26 +0200 | <geekosaur> | yes, docker images are more to install particular ghc versions to build programs that need those versions |
| 2021-03-31 21:27:35 +0200 | <geekosaur> | and there are other/better ways to do that |
| 2021-03-31 21:27:49 +0200 | <_fcntl> | @toms: tried, but have only ghc 8.8 in repository, and it needs 8.10 not available on Ubuntu, so tried with docker |
| 2021-03-31 21:27:49 +0200 | <lambdabot> | Unknown command, try @list |
| 2021-03-31 21:27:49 +0200 | jakalx | (~jakalx@base.jakalx.net) ("Error from remote client") |
| 2021-03-31 21:28:38 +0200 | fuzzy_id | (~user@1.red-88-0-41.dynamicip.rima-tde.net) |
| 2021-03-31 21:28:42 +0200 | <tomsmeding> | _fcntl: people generally use either hvr's ppa, or ghcup to install their ghc; using ghc from the standard distro repositories is fairly uncommon |
| 2021-03-31 21:28:51 +0200 | malumore_ | (~malumore@151.62.117.70) (Remote host closed the connection) |
| 2021-03-31 21:29:07 +0200 | fuzzy_id | (~user@1.red-88-0-41.dynamicip.rima-tde.net) () |
| 2021-03-31 21:29:07 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 21:29:08 +0200 | <_fcntl> | tomsmending: understood, thanks! |
| 2021-03-31 21:29:35 +0200 | malumore | (~malumore@151.62.117.70) |
| 2021-03-31 21:29:56 +0200 | <tomsmeding> | _fcntl: though I guess installing ghc in a docker container shouldn't be that difficult, nor would updating the image you got be, I guess? |
| 2021-03-31 21:30:20 +0200 | dbmikus | (~dbmikus@cpe-76-167-86-219.natsow.res.rr.com) |
| 2021-03-31 21:30:42 +0200 | <_fcntl> | @tomsmending: true, but I'm 'newcomer' followed official docs, and couldn't do anything... |
| 2021-03-31 21:30:42 +0200 | <lambdabot> | Unknown command, try @list |
| 2021-03-31 21:30:47 +0200 | Pickchea | (~private@unaffiliated/pickchea) (Quit: Leaving) |
| 2021-03-31 21:31:27 +0200 | <tomsmeding> | _fcntl: which docs recommended using an outdated docker image? Perhaps those docs need to be updated :) |
| 2021-03-31 21:31:59 +0200 | ubert | (~Thunderbi@p200300ecdf25d9fde6b318fffe838f33.dip0.t-ipconnect.de) |
| 2021-03-31 21:32:07 +0200 | <_fcntl> | tomsmeding: https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation/linux |
| 2021-03-31 21:34:18 +0200 | <Clint> | what's the problem you're trying to solve? |
| 2021-03-31 21:34:42 +0200 | <tomsmeding> | Clint: they're trying to follow official docs to build ghc for local development and obtain a ghc that is quite old |
| 2021-03-31 21:35:29 +0200 | <_fcntl> | Clint: exactly, as tomsmeding said... I'd like to contribute to ghc somehow... |
| 2021-03-31 21:36:05 +0200 | <Clint> | but doesn't that page tell you how to build whatever version of ghc you want? |
| 2021-03-31 21:36:06 +0200 | <tomsmeding> | _fcntl: regardless of what the docs say, anyway, I recommend using hvr's ppa or ghcup and doing it locally |
| 2021-03-31 21:36:43 +0200 | <tomsmeding> | hm, interesting |
| 2021-03-31 21:36:52 +0200 | <tomsmeding> | _fcntl: where did you get the old stuff from? |
| 2021-03-31 21:37:01 +0200 | <tomsmeding> | does the docker container not work as specified? |
| 2021-03-31 21:37:08 +0200 | <_fcntl> | ok, but now my env is getting a little bit messy ;) I've got ghc from aptitude, some local stack installs, not sure if not installed something via cabal and now ... ghcup, must clean that first.. |
| 2021-03-31 21:37:35 +0200 | tomsmeding | assumed without checking that the docker image came with a pre-loaded ghc source tree that was old somehow, but in retrospect that makes no sense |
| 2021-03-31 21:37:58 +0200 | <_fcntl> | toms: not working as current (> 9.1 I suspect) requires 8.10 ghc, and docke image has only 8.4 installed |
| 2021-03-31 21:38:20 +0200 | jakalx | (~jakalx@base.jakalx.net) |
| 2021-03-31 21:38:29 +0200 | <tomsmeding> | _fcntl: the potential problem with not getting ghc from apt is that if you install some system package that requires haskell libraries, that may pull in the system ghc package anyway |
| 2021-03-31 21:38:33 +0200 | <tomsmeding> | _fcntl: ah |
| 2021-03-31 21:38:47 +0200 | <_fcntl> | configure: error: GHC version 8.10 or later is required to compile GHC. |
| 2021-03-31 21:38:54 +0200 | <_fcntl> | that's the message I got |
| 2021-03-31 21:39:04 +0200 | <Clint> | aha |
| 2021-03-31 21:39:05 +0200 | <_fcntl> | pity docker images are not inside ghc repo |
| 2021-03-31 21:39:15 +0200 | <_fcntl> | *docker descriptos |
| 2021-03-31 21:39:32 +0200 | <Clint> | you might want to file a bug on https://github.com/gregwebs/ghc-docker-dev/issues |
| 2021-03-31 21:39:41 +0200 | <Clint> | or send a pull request after tweaking the Dockerfile yourself |
| 2021-03-31 21:39:51 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Quit: Connection closed) |
| 2021-03-31 21:40:04 +0200 | o1lo01ol1o | (~o1lo01ol1@bl7-88-181.dsl.telepac.pt) (Remote host closed the connection) |
| 2021-03-31 21:40:10 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 21:40:32 +0200 | <tomsmeding> | _fcntl: the Dockerfile is there though |
| 2021-03-31 21:40:43 +0200 | <_fcntl> | I may do that but I think it would be easier (?) to introduce dockerfile to ghc source tree |
| 2021-03-31 21:40:46 +0200 | <_fcntl> | lemme check |
| 2021-03-31 21:41:06 +0200 | <tomsmeding> | though debian testing only seems to have ghc-8.8.4 |
| 2021-03-31 21:41:41 +0200 | <Clint> | doesn't matter, he's getting it from hvr |
| 2021-03-31 21:42:20 +0200 | <tomsmeding> | Clint: where do you see that Dockerfile adding hvr's repo? |
| 2021-03-31 21:42:25 +0200 | Guest_17 | (6029f825@096-041-248-037.res.spectrum.com) |
| 2021-03-31 21:42:40 +0200 | <tomsmeding> | oh lol hvr's name isn't in there |
| 2021-03-31 21:42:55 +0200 | <Clint> | tomsmeding: https://github.com/gregwebs/ghc-docker-dev/blob/master/Dockerfile#L30 |
| 2021-03-31 21:42:55 +0200 | tomsmeding | is stupid |
| 2021-03-31 21:43:04 +0200 | <tomsmeding> | yes indeed thanks |
| 2021-03-31 21:43:07 +0200 | <Clint> | np |
| 2021-03-31 21:44:43 +0200 | Lord_of_Life_ | (~Lord@unaffiliated/lord-of-life/x-0885362) |
| 2021-03-31 21:47:07 +0200 | ircbrowse_tom | (~ircbrowse@64.225.78.177) |
| 2021-03-31 21:47:07 +0200 | Server | +CLnt |
| 2021-03-31 21:47:24 +0200 | <tomsmeding> | monochrom: I'm using digitalocean's standard ubuntu image for this particular server |
| 2021-03-31 21:47:36 +0200 | <tomsmeding> | though I changed the system locale to en_US.UTF-8 and it's still crashing :p |
| 2021-03-31 21:47:44 +0200 | Lord_of_Life_ | Lord_of_Life |
| 2021-03-31 21:47:47 +0200 | <monochrom> | haha yikes |
| 2021-03-31 21:48:01 +0200 | <geekosaur> | ick |
| 2021-03-31 21:48:21 +0200 | vgtw | (~vgtw@gateway/tor-sasl/vgtw) (Ping timeout: 240 seconds) |
| 2021-03-31 21:50:12 +0200 | conal | (~conal@64.71.133.70) (Quit: Computer has gone to sleep.) |
| 2021-03-31 21:50:41 +0200 | <monochrom> | Yikes, so Strachey was responsible for the name "currying". |
| 2021-03-31 21:50:51 +0200 | vgtw | (~vgtw@gateway/tor-sasl/vgtw) |
| 2021-03-31 21:51:10 +0200 | <dolio> | Oh really? |
| 2021-03-31 21:51:34 +0200 | <monochrom> | https://en.wikipedia.org/wiki/Christopher_Strachey#Work |
| 2021-03-31 21:52:09 +0200 | <dolio> | So it's his fault that Schönfinkel doesn't get his due? |
| 2021-03-31 21:52:11 +0200 | <monochrom> | haha [citation needed] OK I am not so sure now |
| 2021-03-31 21:54:15 +0200 | <tomsmeding> | relevant: https://en.wikipedia.org/wiki/Currying#History |
| 2021-03-31 21:55:06 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 21:55:22 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 252 seconds) |
| 2021-03-31 21:55:33 +0200 | <tomsmeding> | searching "strachey 1967" turns up https://www.cs.cmu.edu/~crary/819-f09/Strachey67.pdf which doesn't contain the word 'currying' |
| 2021-03-31 21:56:28 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) |
| 2021-03-31 21:56:47 +0200 | <monochrom> | Um, and he got to patent "base registers for program relocation"??!!! |
| 2021-03-31 21:56:48 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) (Read error: Connection reset by peer) |
| 2021-03-31 21:57:58 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) |
| 2021-03-31 21:58:26 +0200 | <tomsmeding> | patent? |
| 2021-03-31 21:58:41 +0200 | <tomsmeding> | did every cpu manufacturer ever pay royalties |
| 2021-03-31 21:58:52 +0200 | <monochrom> | Yeah. The good old days of being able to patent base registers and xor tricks. |
| 2021-03-31 21:59:42 +0200 | <monochrom> | Then again, today we also get to patent 1-click-buy and touch-the-icon-to-open. |
| 2021-03-31 22:00:17 +0200 | <tomsmeding> | patent "using foldl' instead of foldl" and make every haskell program slower |
| 2021-03-31 22:00:17 +0200 | borne | (~fritjof@200116b86411e500f7ed9fd86a2491f0.dip.versatel-1u1.de) (Ping timeout: 250 seconds) |
| 2021-03-31 22:00:39 +0200 | <monochrom> | >:) |
| 2021-03-31 22:01:29 +0200 | _ht | (~quassel@82-169-194-8.biz.kpn.net) (Remote host closed the connection) |
| 2021-03-31 22:04:33 +0200 | argento | (~argent0@191.81.225.82) (Ping timeout: 268 seconds) |
| 2021-03-31 22:05:06 +0200 | petersen | (~petersen@redhat/juhp) (Ping timeout: 240 seconds) |
| 2021-03-31 22:05:14 +0200 | kritzefitz_ | (~kritzefit@212.86.56.80) (Remote host closed the connection) |
| 2021-03-31 22:06:14 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection) |
| 2021-03-31 22:06:21 +0200 | geowiesnot | (~user@87-89-181-157.abo.bbox.fr) (Ping timeout: 260 seconds) |
| 2021-03-31 22:07:13 +0200 | petersen | (~petersen@redhat/juhp) |
| 2021-03-31 22:09:08 +0200 | <maerwald> | computer scientists are to blame for most of our modern day problems |
| 2021-03-31 22:10:17 +0200 | abrar | (~abrar@static-108-30-103-121.nycmny.fios.verizon.net) (Quit: WeeChat 2.9) |
| 2021-03-31 22:10:35 +0200 | justsomeguy | (~justsomeg@unaffiliated/--/x-3805311) |
| 2021-03-31 22:10:38 +0200 | <[exa]> | (including computers) |
| 2021-03-31 22:11:01 +0200 | Rudd0 | (~Rudd0@185.189.115.103) (Ping timeout: 260 seconds) |
| 2021-03-31 22:11:33 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) |
| 2021-03-31 22:11:55 +0200 | usr25 | (~usr25@unaffiliated/usr25) |
| 2021-03-31 22:12:17 +0200 | <maerwald> | I'm glad many high-IQ ppl waste their life on chess. That creates less problems for us. |
| 2021-03-31 22:12:56 +0200 | borne | (~fritjof@200116b86411e500f7ed9fd86a2491f0.dip.versatel-1u1.de) |
| 2021-03-31 22:13:38 +0200 | kenran_ | (~kenran@mue-88-130-62-062.dsl.tropolys.de) |
| 2021-03-31 22:16:11 +0200 | takuan | (~takuan@178-116-218-225.access.telenet.be) (Remote host closed the connection) |
| 2021-03-31 22:16:11 +0200 | wroathe | (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 240 seconds) |
| 2021-03-31 22:16:15 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Quit: Connection closed) |
| 2021-03-31 22:16:35 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 22:18:11 +0200 | v01d4lph4 | (~v01d4lph4@223.190.20.92) |
| 2021-03-31 22:18:27 +0200 | fancyremarker | (~fancyrema@185.169.233.10) (Remote host closed the connection) |
| 2021-03-31 22:18:47 +0200 | geekosaur | (82650c7a@130.101.12.122) (Quit: Connection closed) |
| 2021-03-31 22:18:48 +0200 | hiroaki | (~hiroaki@2a02:8108:8c40:2bb8:1351:13b7:f6af:b97a) (Ping timeout: 246 seconds) |
| 2021-03-31 22:21:11 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 240 seconds) |
| 2021-03-31 22:22:18 +0200 | v01d4lph4 | (~v01d4lph4@223.190.20.92) (Ping timeout: 240 seconds) |
| 2021-03-31 22:23:12 +0200 | takuan | (~takuan@178-116-218-225.access.telenet.be) |
| 2021-03-31 22:23:51 +0200 | <fryguybob> | Is there a straight forward way to write "shortest" so that shortest [[1..], [1,2,3]] -> [1,2,3] ? |
| 2021-03-31 22:25:01 +0200 | kenran | (~kenran@mue-88-130-62-062.dsl.tropolys.de) (Quit: Lost terminal) |
| 2021-03-31 22:25:41 +0200 | <sclv> | fryguybob: sure, just use `genericLength` and peano numbers, I think :-) |
| 2021-03-31 22:25:54 +0200 | <justsomeguy> | Maybe by using a type other than list, that requries a finite length. |
| 2021-03-31 22:25:58 +0200 | <sclv> | actually you can do it directly by induction |
| 2021-03-31 22:26:24 +0200 | <[exa]> | fryguybob: experiment with `map tail` |
| 2021-03-31 22:26:26 +0200 | <sclv> | pair each list with itself, using the first element as the "index" |
| 2021-03-31 22:26:58 +0200 | <sclv> | if there's something for which the "index" is nil, return it, if not drop one from each index, repeat |
| 2021-03-31 22:27:47 +0200 | <fryguybob> | I was thinking something silly like map head . sequence ... |
| 2021-03-31 22:28:14 +0200 | stree | (~stree@68.36.8.116) (Ping timeout: 260 seconds) |
| 2021-03-31 22:28:17 +0200 | <sclv> | oh yeah can't imagine a fully golfed one, but i can imagine a "slick" looking one with generic peanos at least |
| 2021-03-31 22:28:34 +0200 | conal | (~conal@64.71.133.70) |
| 2021-03-31 22:30:11 +0200 | merijn | (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 240 seconds) |
| 2021-03-31 22:31:10 +0200 | hiroaki | (~hiroaki@2a02:8108:8c40:2bb8:461b:1426:c666:74bc) |
| 2021-03-31 22:33:24 +0200 | <[exa]> | concatIterate would help |
| 2021-03-31 22:34:52 +0200 | kenanmarasli | (1fdf0dda@31.223.13.218) |
| 2021-03-31 22:37:16 +0200 | supercoven | (~Supercove@dsl-hkibng31-54fabd-233.dhcp.inet.fi) (Ping timeout: 260 seconds) |
| 2021-03-31 22:38:13 +0200 | kenran_ | (~kenran@mue-88-130-62-062.dsl.tropolys.de) (Quit: leaving) |
| 2021-03-31 22:38:52 +0200 | <kenanmarasli> | I am having a bit of a terminology problem. |
| 2021-03-31 22:38:53 +0200 | <kenanmarasli> | Why are *if* *else* *case* expressions in Haskell, but in C they are statements? |
| 2021-03-31 22:39:28 +0200 | <Rembane> | kenanmarasli: Because Haskell doesn't have statements. This might actually be a lie, but it's a good lie imo. |
| 2021-03-31 22:39:54 +0200 | <maerwald> | Rembane: it's not a lie |
| 2021-03-31 22:40:00 +0200 | <[exa]> | kenanmarasli: counterexample-- in C, there's no sense doing `a = if (123) printf("123");` |
| 2021-03-31 22:40:11 +0200 | <ph88^> | does anyone know how this site came into existence ? https://riptutorial.com/haskell |
| 2021-03-31 22:40:30 +0200 | ubert | (~Thunderbi@p200300ecdf25d9fde6b318fffe838f33.dip0.t-ipconnect.de) (Remote host closed the connection) |
| 2021-03-31 22:40:50 +0200 | <Rembane> | maerwald: Cool. Are the functions in a module expressions? Or are they something else? |
| 2021-03-31 22:40:55 +0200 | solidus-river | (~mike@174.127.249.180) |
| 2021-03-31 22:41:26 +0200 | stree | (~stree@68.36.8.116) |
| 2021-03-31 22:41:32 +0200 | <yushyin> | declarations/definitions |
| 2021-03-31 22:41:43 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) (Read error: Connection reset by peer) |
| 2021-03-31 22:41:52 +0200 | <Rembane> | Of course! Thank you! |
| 2021-03-31 22:41:55 +0200 | <solidus-river> | hey all, i have to parse a bunch of binary blobs sent over the wire and each parse returns an Either Err Result. It winds up being an unwieldly number of nested case statements to parse is there a better way to do this syntactically? |
| 2021-03-31 22:41:57 +0200 | <maerwald> | haskell report doesn't say anything about execution either |
| 2021-03-31 22:42:04 +0200 | <maerwald> | it's not specified |
| 2021-03-31 22:42:18 +0200 | hyperisco | (~hyperisco@d192-186-117-226.static.comm.cgocable.net) |
| 2021-03-31 22:42:52 +0200 | olligobber | (olligobber@gateway/vpn/privateinternetaccess/olligobber) |
| 2021-03-31 22:42:56 +0200 | <[exa]> | solidus-river: attoparsec? (not sure how much "binary" it is but if it fits in bytestrings then attoparsec should just work) |
| 2021-03-31 22:43:56 +0200 | usr25 | (~usr25@unaffiliated/usr25) ("Leaving") |
| 2021-03-31 22:44:03 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) |
| 2021-03-31 22:44:07 +0200 | <ephemient> | @hackage attoparsec |
| 2021-03-31 22:44:07 +0200 | <lambdabot> | https://hackage.haskell.org/package/attoparsec |
| 2021-03-31 22:44:11 +0200 | <ephemient> | @hackage binary |
| 2021-03-31 22:44:11 +0200 | <lambdabot> | https://hackage.haskell.org/package/binary |
| 2021-03-31 22:44:24 +0200 | <[exa]> | solidus-river: ah you already have the functions for parsing these, sorry. You might want to exploit the monad instance for Either then, it works like "returning Left means an error" |
| 2021-03-31 22:45:40 +0200 | <solidus-river> | [exa]: ooo, the monad instance looks like exactly what I want, I can just print out the whole sequence on any error and then not worry so much about reporting exactly what failed to parse |
| 2021-03-31 22:45:46 +0200 | <ephemient> | Either Err Result is in the correct order for that already, but I am not sure given the previous statement whether the awkwardness is in the parsing or in handling the parse result? |
| 2021-03-31 22:47:20 +0200 | <[exa]> | solidus-river: it usually helps, given there's not much other complexity that would break it. Generally, you can rewrite your program with `do` statements, "bind" each Either with say `subResult <- parsingOperation`, and you get the "Right" type and can completely ignore Lefts |
| 2021-03-31 22:47:31 +0200 | <[exa]> | if anything breaks, the first Left gets returned |
| 2021-03-31 22:48:07 +0200 | <[exa]> | > do { a <- Right 5; b <- Right 3; Right (a+b); } |
| 2021-03-31 22:48:09 +0200 | <lambdabot> | Right 8 |
| 2021-03-31 22:48:24 +0200 | <[exa]> | (you can use `return` or `pure` instead of the last `Right`) |
| 2021-03-31 22:48:29 +0200 | <[exa]> | compare to: |
| 2021-03-31 22:48:33 +0200 | <[exa]> | > do { a <- Right 5; b <- Left "sorry"; Right (a+b); } |
| 2021-03-31 22:48:35 +0200 | <lambdabot> | Left "sorry" |
| 2021-03-31 22:48:58 +0200 | <solidus-river> | i think the monad instance would collapse things nicely. I was being kinda derpy and logging each parse error nad the case statments were running of the right end of the screen. the do syntax looks tasty though, every error ends up being the same. I need to be better about reading how things are instanced that I'm using |
| 2021-03-31 22:49:10 +0200 | <kenanmarasli> | Rembane: I see. Well for me it looks like I can think of these keywords in Haskell like they are wrapped in a function. *if* *else* eventually returns a value and that's why they are expressions. Is it correct? |
| 2021-03-31 22:49:24 +0200 | <solidus-river> | side note, I don't think the monadic instance in zeromq4-haskell is actually usefull in a real world scenario. |
| 2021-03-31 22:49:39 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) (Read error: Connection reset by peer) |
| 2021-03-31 22:49:58 +0200 | <solidus-river> | but I should also :X until I have a pr with a different instance to back my thoughts |
| 2021-03-31 22:50:00 +0200 | Guest_17 | (6029f825@096-041-248-037.res.spectrum.com) (Quit: Connection closed) |
| 2021-03-31 22:50:20 +0200 | <Rembane> | kenanmarasli: Yeah, they evaluate to a value. Both branches evaluate to values of the same type too which is a nice property. |
| 2021-03-31 22:50:25 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) |
| 2021-03-31 22:50:49 +0200 | <solidus-river> | * not actually useful |
| 2021-03-31 22:51:00 +0200 | <kenanmarasli> | Thank you :) |
| 2021-03-31 22:51:08 +0200 | <Rembane> | np :) |
| 2021-03-31 22:51:22 +0200 | son0p | (~son0p@181.136.122.143) (Quit: Lost terminal) |
| 2021-03-31 22:52:09 +0200 | <[exa]> | solidus-river: it may be good for demos. it kinda reminds me the Action monad from Scotty (takes care about simple mistakes, causes trouble later) |
| 2021-03-31 22:52:30 +0200 | Narinas | (~Narinas@187-178-93-112.dynamic.axtel.net) |
| 2021-03-31 22:53:24 +0200 | <[exa]> | (/me -> afk) |
| 2021-03-31 22:53:47 +0200 | stree | (~stree@68.36.8.116) (Quit: Caught exception) |
| 2021-03-31 22:54:08 +0200 | <sm2n> | kenanmarasli, [exa], note that the C example could return a value, it is just that C was designed not to |
| 2021-03-31 22:54:09 +0200 | stree | (~stree@68.36.8.116) |
| 2021-03-31 22:54:40 +0200 | <sm2n> | most lisps will return a value in that example, for example |
| 2021-03-31 22:54:47 +0200 | <sm2n> | C is just not very compositional |
| 2021-03-31 22:54:50 +0200 | <wz1000> | is there a variant of Data.Sequence on hackage that is strict in the elements? |
| 2021-03-31 22:55:18 +0200 | royal_screwup21 | (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 265 seconds) |
| 2021-03-31 22:55:49 +0200 | <sm2n> | though I should point out, C has the ternary operator a ? b : c, which is essentially if expressions |
| 2021-03-31 22:55:55 +0200 | <wz1000> | I guess Vector would also work, but I can't use Data.Vector.Unboxed or Data.Vector.Storable |
| 2021-03-31 22:56:49 +0200 | <monochrom> | Right, Haskell's if-then-else is really better off compared to C's ?: |
| 2021-03-31 22:57:27 +0200 | bitmapper | (uid464869@gateway/web/irccloud.com/x-lksmeqawycwfpajp) |
| 2021-03-31 22:57:54 +0200 | <systemfault> | No... but Haskell has alternatives when you need to do multiple comparisons. C does not. |
| 2021-03-31 22:58:06 +0200 | cyphase | (~cyphase@unaffiliated/cyphase) (Ping timeout: 240 seconds) |
| 2021-03-31 22:58:21 +0200 | RusAlex | (~Chel@unaffiliated/rusalex) (Ping timeout: 246 seconds) |
| 2021-03-31 22:59:03 +0200 | <monochrom> | I am just talking about if-then-else. |
| 2021-03-31 22:59:28 +0200 | <sm2n> | yeah, of course |
| 2021-03-31 22:59:40 +0200 | <monochrom> | and on the C side, just ?: vs if(){}else{} |
| 2021-03-31 22:59:59 +0200 | acidjnk_new | (~acidjnk@p200300d0c72b95486cfd1d07fe22841d.dip0.t-ipconnect.de) (Ping timeout: 245 seconds) |
| 2021-03-31 23:00:45 +0200 | <monochrom> | If I relate Haskell's Int32#->Int32# to C's int(int), you don't go "no, Haskell has polymorphic types, C does not". |
| 2021-03-31 23:01:06 +0200 | Lord_of_Life | (~Lord@unaffiliated/lord-of-life/x-0885362) (Ping timeout: 265 seconds) |
| 2021-03-31 23:01:49 +0200 | <monochrom> | Or maybe you should! Someone please tell me "no, GHC has levity polymorphism, C does not". >:) |
| 2021-03-31 23:02:18 +0200 | <solidus-river> | [exa]: yeah it hides timing around closing sockets and provides an easy way to do something in another thread but unless I'm missing something about forkFinally, in doing so it takes away your ability to be smart about coordinating shutdown or reacting to fatal errors in threads |
| 2021-03-31 23:02:26 +0200 | <Rembane> | I don't know about levity polymorphism, but I could sure use some levitating polymorphism. |
| 2021-03-31 23:02:33 +0200 | <solidus-river> | sm2n: i missed the paste but I"m curious |
| 2021-03-31 23:02:34 +0200 | <monochrom> | :) |
| 2021-03-31 23:02:51 +0200 | hyperisco | (~hyperisco@d192-186-117-226.static.comm.cgocable.net) (Ping timeout: 252 seconds) |
| 2021-03-31 23:03:28 +0200 | <sm2n> | paste? |
| 2021-03-31 23:04:03 +0200 | <solidus-river> | i thought there was some code being referenced in the if-then-else discussion |
| 2021-03-31 23:05:00 +0200 | ian_ | Igloo |
| 2021-03-31 23:05:30 +0200 | cyphase | (~cyphase@unaffiliated/cyphase) |
| 2021-03-31 23:05:33 +0200 | yunusaydin | (4eb8266d@78.184.38.109) |
| 2021-03-31 23:06:12 +0200 | <sm2n> | <[exa]> kenanmarasli: counterexample-- in C, there's no sense doing `a = if (123) printf("123");` |
| 2021-03-31 23:06:45 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 23:06:58 +0200 | kenanmarasli | (1fdf0dda@31.223.13.218) (Quit: Connection closed) |
| 2021-03-31 23:07:08 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection) |
| 2021-03-31 23:07:10 +0200 | <Rembane> | sm2n: You could do that in Haskell for about the same amount of sense. |
| 2021-03-31 23:07:25 +0200 | heatsink | (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) |
| 2021-03-31 23:08:09 +0200 | lampowner | (~xblow@2a02:2168:b03:3b74::1) (Ping timeout: 246 seconds) |
| 2021-03-31 23:09:56 +0200 | nbloomf | (~nbloomf@2600:1700:ad14:3020:4485:5098:cb7a:cbe1) (Quit: My MacBook has gone to sleep. ZZZzzz…) |
| 2021-03-31 23:09:56 +0200 | <sm2n> | my point is that is a language design thing |
| 2021-03-31 23:10:28 +0200 | <monochrom> | The story of the imperative, statement version of if(){} is also interesting in its own right. |
| 2021-03-31 23:11:29 +0200 | <monochrom> | First, realize that sequential composition of two statements is an associative operator. Indeed, in Pascal, the semicolon is a binary operator, you cannot write "s; t;", you can only write "s; t". |
| 2021-03-31 23:11:34 +0200 | int-e | (~noone@int-e.eu) (Remote host closed the connection) |
| 2021-03-31 23:12:02 +0200 | olligobber | (olligobber@gateway/vpn/privateinternetaccess/olligobber) (Remote host closed the connection) |
| 2021-03-31 23:12:16 +0200 | int-e | (~noone@int-e.eu) |
| 2021-03-31 23:12:22 +0200 | <monochrom> | So next you ask "does it have an identity?". Yes, that would be the no-op statement, syntactically as various ways of writing "the empty statement". |
| 2021-03-31 23:12:55 +0200 | <monochrom> | With that, if(){} is best viewed as syntax sugar for if(){}else{no-op}. |
| 2021-03-31 23:13:04 +0200 | <ephemient> | in IO, `when` acts like a single-branch imperative if. you don't get a (useful) result out of it either |
| 2021-03-31 23:13:32 +0200 | tolwiz | (4f028693@host-79-2-134-147.business.telecomitalia.it) |
| 2021-03-31 23:13:47 +0200 | <monochrom> | If you ever try to reason about imperative programs (euphemism for "give the language a semantics"), you need to be aware of this, and not be blinded by the slick "if(){}" syntax. |
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| 2021-03-31 23:51:52 +0200 | <_fcntl> | (woohoo! at last, built ghc 9.2...) |
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