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Logs: liberachat/#haskell

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2021-06-01 15:29:29 <ski> bor0> :t hoareSequence
2021-06-01 15:29:51 <boxscape> ski https://github.com/bor0/hoare-imp/blob/d7b154b8d9b68fcf6466b22ff1f40591db3dcdb4/src/Hoare.hs#L35
2021-06-01 15:29:53 <bor0> https://github.com/bor0/hoare-imp/blob/master/src/Hoare.hs#L35
2021-06-01 15:33:27 × qbt quits (~edun@user/edun) (Ping timeout: 272 seconds)
2021-06-01 15:34:42 <ski> bor0 : you know you could use `do'-notation, for the `Either' stuff, yes ?
2021-06-01 15:35:40 × wei2912 quits (~wei2912@112.199.250.21) (Quit: Lost terminal)
2021-06-01 15:35:49 <bor0> I totally forgot about that one! Are you saying these can look better? :D https://github.com/bor0/hoare-imp/blob/master/examples/ExampleTNT.hs
2021-06-01 15:36:08 <bor0> (Don't look at the other examples, I still haven't updated all of them to use monadic Either instead of hacky `fromRight`)
2021-06-01 15:36:46 <ski> lemma1 = do
2021-06-01 15:36:49 <boxscape> that code almost looks like you took something that was written in do-notation and translated it to non-do-notation :)
2021-06-01 15:36:58 <bor0> Hahahah.
2021-06-01 15:37:03 <ski> step1 <- axiom3 (Var A) (Var B)
2021-06-01 15:37:10 <ski> step2 <- ruleSpec step1 (Var D)
2021-06-01 15:37:12 <ski> ...
2021-06-01 15:37:17 <bor0> Oh man...
2021-06-01 15:37:24 <bor0> Time for another rewrite!
2021-06-01 15:38:59 <ski> (flipping the order of the `ruleFantasy' parameters might also look nicer)
2021-06-01 15:39:04 <bor0> Wow, it just looks amazing this way!
2021-06-01 15:39:17 × ikex quits (~ash@user/ikex) (Ping timeout: 264 seconds)
2021-06-01 15:39:17 ski smiles
2021-06-01 15:39:35 × eggplantade quits (~Eggplanta@2600:1700:bef1:5e10:5878:fcfd:e07b:ffd9) (Remote host closed the connection)
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2021-06-01 15:40:26 <bor0> Can you expand on the `ruleFantasy` parameters?
2021-06-01 15:41:41 × dpl_ quits (~dpl@77-121-78-163.chn.volia.net) (Ping timeout: 264 seconds)
2021-06-01 15:42:09 fizbin joins (~fizbin@c-73-33-197-160.hsd1.nj.comcast.net)
2021-06-01 15:42:25 × tromp quits (~textual@dhcp-077-249-230-040.chello.nl) (Quit: My iMac has gone to sleep. ZZZzzz…)
2021-06-01 15:43:50 <ski> let premise = PropVar (ForAll D (PropVar (Eq (..) (..))))
2021-06-01 15:44:12 <ski> step7 <- ruleFantasy premise $ \premise -> do
2021-06-01 15:44:30 × boxscape quits (~boxscape@user/boxscape) (Quit: Connection closed)
2021-06-01 15:44:33 <bor0> Ah!
2021-06-01 15:44:35 <ski> step8 <- ruleSpec premise (Var D)
2021-06-01 15:44:39 <APic>
2021-06-01 15:44:39 <ski> ...
2021-06-01 15:45:00 <bor0> I'll definitely miss those redundant `let f premise`
2021-06-01 15:45:01 eggplantade joins (~Eggplanta@2600:1700:bef1:5e10:5878:fcfd:e07b:ffd9)
2021-06-01 15:45:09 <ski> ruleGeneralize step10 D (Just premise)
2021-06-01 15:45:26 <ski> ruleGeneralize step7 C Nothing
2021-06-01 15:46:37 <ski> "miss", as in you'll regret removing them, or as in you'll prefer to drop them ?
2021-06-01 15:46:40 × Bartosz quits (~textual@24.35.90.211) (Quit: My MacBook has gone to sleep. ZZZzzz…)
2021-06-01 15:46:43 boxscape joins (~boxscape@user/boxscape)
2021-06-01 15:46:44 × ubert quits (~Thunderbi@2a02:8109:9880:303c:ca5b:76ff:fe29:f233) (Remote host closed the connection)
2021-06-01 15:47:30 <ski> (it's not clear to me what the relation between these two different `premise's are, but i kept your variable naming ..)
2021-06-01 15:48:03 <bor0> I think it's safe to assume just another redundancy
2021-06-01 15:48:46 × dunj3 quits (~dunj3@2001:16b8:3059:9800:5856:7ab4:1dd8:26ae) (Remote host closed the connection)
2021-06-01 15:50:07 <bor0> These proofs suddenly became readable! This is fun
2021-06-01 15:50:49 <boxscape> Haskell does have a reputation for being a good host language for EDSLs
2021-06-01 15:51:03 <ski> readability is a good thing, yea :)
2021-06-01 15:51:22 <bor0> boxscape, I thought it had a good reputation for being a good host language without readability, but now with this readability... ++
2021-06-01 15:51:35 <boxscape> hehe
2021-06-01 15:51:35 dunkeln joins (~dunkeln@94.129.65.28)
2021-06-01 15:51:44 × chele quits (~chele@user/chele) (Remote host closed the connection)
2021-06-01 15:52:07 <bor0> One thing I really like about doing this in Haskell, vs e.g. in Racket is refactoring. It's a breeze. Almost like random work until ghci is happy
2021-06-01 15:52:56 <boxscape> yep static types are pretty cool
2021-06-01 15:53:05 × merijn quits (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 264 seconds)
2021-06-01 15:53:10 <boxscape> (though I think racket has an optional static type system? I've never used racket)
2021-06-01 15:53:16 Deide joins (~Deide@wire.desu.ga)
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2021-06-01 15:53:26 ski . o O ( "Follow the types where they lead -- follow the types where they lead. Follow, follow, follow, follow -- follow the types where they lead." )
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2021-06-01 15:54:09 <ski> there's Typed Racket, yea
2021-06-01 15:54:40 <boxscape> ok
2021-06-01 15:54:43 <hseg> stack isn't picking up the new commonmark version (from last friday) on hackage
2021-06-01 15:54:58 <hseg> even though I ran stack update
2021-06-01 15:55:04 <ski> (one interesting thing is the higher-order blame tracking system, for contracts)
2021-06-01 15:55:52 <kosmikus> xwx: lhs2tex-1.24 should work ok with HLS (within certain limits).
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2021-06-01 16:03:01 <hseg> nuked $XDG_DATA_HOME/stack, hopefully that helps things
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2021-06-01 16:10:17 <kuribas> "cabal haddock --executables" gives an error: cabal: unrecognized 'haddock' option `--executables'
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2021-06-01 16:11:25 <bor0> ski, boxscape https://github.com/bor0/hoare-imp/blob/master/examples/ExampleTNT.hs 😎
2021-06-01 16:11:41 <kuribas> hmm cabal haddock myproject:executables does work...
2021-06-01 16:11:50 <boxscape> bor0 nice
2021-06-01 16:11:55 <kuribas> the cabal haddock --help text is wrong however.
2021-06-01 16:11:56 <geekosaur> looks like it's --haddock-executables ?
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2021-06-01 16:13:28 <geekosaur> the text at the top is wrong but the actual option descriptions later are correct
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2021-06-01 16:15:27 <boxscape> bor0 do step0, step1, step2 etc all have the same type or different types?
2021-06-01 16:15:31 <kuribas> geekosaur: right
2021-06-01 16:16:32 <boxscape> (whoops step0 doesn't actually exist)
2021-06-01 16:16:36 <bor0> All same I believe - either string (error) or proof
2021-06-01 16:16:42 <boxscape> ok
2021-06-01 16:17:31 <boxscape> bor0 I was thinking about whether it would make sense to use the State monad which is why I asked that, but the answer is no

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