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2020-10-12 08:48:48 <dminuoso> % infixr 6 `f`; f = f
2020-10-12 08:48:48 <yahb> dminuoso:
2020-10-12 08:49:00 graf_blutwurst joins (~user@2a02:168:49bc:0:60e6:a793:624b:d03a)
2020-10-12 08:49:00 <dminuoso> % f :: Int; infixr 6 `f`; f = f
2020-10-12 08:49:00 <yahb> dminuoso:
2020-10-12 08:49:13 xff0x joins (~fox@217.110.198.158)
2020-10-12 08:49:38 <bahamas> merijn: what do you mean by "I mean even in the absense of `otherwise`"?
2020-10-12 08:50:06 dminuoso wonders whether merijn forgot to press enter on some message
2020-10-12 08:50:09 akegalj joins (~akegalj@93-138-187-99.adsl.net.t-com.hr)
2020-10-12 08:50:10 × heatsink quits (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Ping timeout: 246 seconds)
2020-10-12 08:54:59 × kl1xto quits (~klixto@130.220.8.149) (Quit: WeeChat 2.9)
2020-10-12 08:55:07 <merijn> Nah, I got distracted by work
2020-10-12 08:56:08 <merijn> bahamas: I meant that this is perfectly fine: https://paste.tomsmeding.com/bYa6W8My
2020-10-12 08:56:21 <merijn> If the 2 guards fail, it will simply fall through to the 2nd pattern
2020-10-12 09:00:01 × blardo quits (~blardo@195.206.169.184) ()
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2020-10-12 09:01:13 <dminuoso> Useful to know, you can define let bindings in guards. :)
2020-10-12 09:01:26 <dminuoso> Took me a while to figure that one out
2020-10-12 09:01:45 <merijn> dminuoso: Or, you just use pattern guards :p
2020-10-12 09:01:57 <merijn> Pattern guards are the most underrated feature of Haskell2010
2020-10-12 09:02:48 <kuribas> merijn: I found a solution for the json representation problem. I made a DSL for rewriting the JSON before parsing it using generics.
2020-10-12 09:03:09 <kuribas> https://gist.github.com/kuribas/9826b1fb9f2907a5c40baff1d7bbcb83
2020-10-12 09:03:18 <kuribas> it's typesafe
2020-10-12 09:03:20 <merijn> Not sure I wanna click that xD
2020-10-12 09:03:55 <dminuoso> merijn: pattern guards are more limited though
2020-10-12 09:04:04 <merijn> dminuoso: How so?
2020-10-12 09:04:13 <dminuoso> Can you set up recursive bindings with them?
2020-10-12 09:04:21 <merijn> ah...probably not?
2020-10-12 09:05:16 × thir quits (~thir@p200300f27f02580060eb7dde324e54c8.dip0.t-ipconnect.de) (Ping timeout: 244 seconds)
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2020-10-12 09:05:58 <dminuoso> merijn: And at the same time, why would I use `Foo r <- bar` over `let Foo r = bar`?
2020-10-12 09:06:25 × GyroW quits (~GyroW@unaffiliated/gyrow) (Ping timeout: 240 seconds)
2020-10-12 09:06:28 <dminuoso> Non-simple bindings are already part of Haskel2010
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2020-10-12 09:07:02 <dminuoso> I mean, pattern guards have their use for when you want to *filter* out based on non-match
2020-10-12 09:07:05 cosimone joins (~cosimone@93-47-228-249.ip115.fastwebnet.it)
2020-10-12 09:07:10 <dminuoso> but they dont seem like a good alternative to let just for the sake of it
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2020-10-12 09:07:30 <bahamas> merijn: do you have an example of pattern guards usage?
2020-10-12 09:08:14 <dminuoso> bahamas: https://gist.github.com/dminuoso/0da790d5ac72f0cfab1e451a306ca064
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2020-10-12 09:10:48 <kuribas> merijn: it's pretty easy
2020-10-12 09:11:09 <kuribas> merijn: you give the destination field, and the path to the origin field.
2020-10-12 09:11:26 <kuribas> merijn: and the destination field is typechecked against the given type.
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2020-10-12 09:11:41 <bahamas> dminuoso: thanks
2020-10-12 09:11:56 <kuribas> merijn: and there is a Maybe variant for possible empty fields.
2020-10-12 09:12:16 <kuribas> merijn: and the generator does the opposite operation.
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2020-10-12 09:13:07 <kuribas> merijn: here is the implementation: https://gist.github.com/kuribas/5c617ecf025ccb37467a23556cbe963e
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2020-10-12 09:14:33 <kuribas> merijn: and you simply apply the transformation before/after parsing/toJSON
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2020-10-12 09:25:23 <kuribas> merijn: this substantially reduces the amount of boilerplate required when writing manual instances.
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2020-10-12 09:25:56 <kuribas> merijn: and also solves the problem that manual instances aren't guaranteed to be consistend, when going to and from JSON.
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2020-10-12 09:28:09 <kuribas> I am not saying this solves every usecase, for everyone, but it works great for ours.
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2020-10-12 09:52:58 hackage mu-schema 0.3.1.0 - Format-independent schemas for serialization https://hackage.haskell.org/package/mu-schema-0.3.1.0 (AlejandroSerrano)
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2020-10-12 09:56:27 hackage mu-rpc 0.4.0.0 - Protocol-independent declaration of services and servers. https://hackage.haskell.org/package/mu-rpc-0.4.0.0 (AlejandroSerrano)
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2020-10-12 10:00:58 hackage mu-lens 0.3.0.0 - Lenses for @mu-schema@ terms https://hackage.haskell.org/package/mu-lens-0.3.0.0 (AlejandroSerrano)
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