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2020-09-21 15:57:47 <edwardk> pretty happy that my bytestring patch is finally going in. i'd practically forgotten about in the last year, other than using it in some cabal.project.local's
2020-09-21 15:58:00 <dminuoso> % :t Control.Exception.evaluate -- qwerty93
2020-09-21 15:58:00 <yahb> dminuoso: a -> IO a
2020-09-21 15:58:16 <dminuoso> Note, you might be tempted to use unsafePerformIO with this, but there's good reasons not to.
2020-09-21 15:58:43 <dolio> I think you should eliminate your desire to write such a function. :)
2020-09-21 15:59:59 <qwerty93> I have seen the example `catchPure h v = unsafePerformIO $ evaluate v `catch` (pure . h)` but this can only return some sort of default value for a if an error is thrown
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2020-09-21 16:00:31 <davean> qwerty93: you think thats what it does at least.
2020-09-21 16:00:36 <davean> qwerty93: this is a very bad idea.
2020-09-21 16:00:51 <edwardk> qwerty93: the problem is it isn't monotone
2020-09-21 16:01:19 <davean> And thats why it doesn't do what you think it does.
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2020-09-21 16:02:22 <edwardk> in haskell pure code you enjoy the benefits of the fact that if you make your inputs more defined all that can happen is that at worst your output becomes more defined. in a world with catchPure that is no longer the case
2020-09-21 16:02:39 <edwardk> that is a pretty high price of admission
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2020-09-21 16:04:22 <qwerty93> I just want to use it for a special debugging mode, the final code would not use it anymore. So, is this not possible at all or just highly advised against?
2020-09-21 16:05:28 <davean> qwerty93: It can make your debugging harder for the reason above.
2020-09-21 16:06:31 <davean> as for if its possible, that depends on what "it" is, and I don't think you understand what it is and thats the problem.
2020-09-21 16:07:41 <qwerty93> davean: you mean it affects the semantics in the sense that is forces evaluation which could cause problems if laziness is expected? the code I'm interested in is not affected by eager evaluation. or is there more?
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2020-09-21 16:08:02 <davean> qwerty93: Theres more, see edwardk's comment.
2020-09-21 16:08:50 <davean> qwerty93: Its value can change based on how you look at it now.
2020-09-21 16:08:53 <edwardk> qwerty93: no monotonicity police will be dispatched to your location, just saying the nature of the issue
2020-09-21 16:09:41 <davean> qwerty93: If it throws an exception, an exception is throw, how does this new function help you in your mind?
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2020-09-21 16:11:05 <davean> Tahts the sort of function I use debugging to fix, not the sort of function I use to debug.
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2020-09-21 16:17:12 <cheater> glguy: cmd.exe supports xterm escape sequences now
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2020-09-21 17:03:58 hackage tomland 1.3.1.0 - Bidirectional TOML serialization https://hackage.haskell.org/package/tomland-1.3.1.0 (vrom911)
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2020-09-21 17:17:28 hackage stm-actor 0.1.2.1 - A simplistic actor model based on STM https://hackage.haskell.org/package/stm-actor-0.1.2.1 (sgschlesinger)
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