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2021-03-29 16:05:46 <Gurkenglas> What language or language extension do I want to model types like "real numbers where a less defined than b <=> a at most b" and "1-lipschitz functions on the previous type"?
2021-03-29 16:05:48 × molehillish quits (~molehilli@2600:8800:8d06:1800:6438:fe04:a25d:577) (Remote host closed the connection)
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2021-03-29 16:08:12 <xerox_> am I completely off track wanting this? deriving instance Enum a => Enum (Maybe a
2021-03-29 16:08:26 <xerox_> (using StandaloneDeriving and friends)
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2021-03-29 16:11:37 <[exa]> xerox_: it's been discussed already for sure, but I don't remember the result
2021-03-29 16:12:15 <[exa]> uh what, hackage down?
2021-03-29 16:12:40 <[exa]> anyway, xerox_: Data.Enum.Deriving wouldn't work?
2021-03-29 16:13:38 × codygman__ quits (~user@47.186.207.161) (Ping timeout: 240 seconds)
2021-03-29 16:13:59 <xerox_> first time delving into (non-haskell-2010-)deriving, didn't know about that package, just trying to figure out what ghc allows me to do as is for starters
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2021-03-29 16:17:40 <xerox_> open to other ideas as well, trying to go from a newtype Foo = .. with deriving Enum to data Bar = Other | Foo and get that extra "Other" snuck in there into Enum
2021-03-29 16:18:00 <dexterfoo> hello when will hackage docs be back online?
2021-03-29 16:18:36 <xerox_> I guess in the meanwhile one can use stackage.org
2021-03-29 16:18:41 <xerox_> I often default to that one anyway
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2021-03-29 16:28:23 <slack1256> Gurkenglas: you probably want agda by then
2021-03-29 16:28:33 <slack1256> Computable real numbers and all that jazz
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2021-03-29 16:30:26 <slack1256> dexterfoo: If you have a local copy of the libraries you want documentation of, you can see where those html are with the command `ghc-pkg field <package> haddock-html`.
2021-03-29 16:31:28 <statusbot> Status update: Due to a disk space issue the hackage web interface is down for a storage upgrade. -- http://status.haskell.org/pages/incident/537c07b0cf1fad5830000093/606200df2a84ed05341dcbf1
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2021-03-29 16:35:24 <Gurkenglas> slack1256, not quite computable real numbers. I mean a type where each element corresponds to a real number and the definedness relation (in the sense that undefined is less defined than "asd") corresponds to the usual order on real numbers
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2021-03-29 16:36:05 <Gurkenglas> (i mean, i can kinda make one: newtype Real = UnsafeReal {greaterThan :: Double -> ()}; embedDouble :: Double -> Real; embedDouble d = UnsafeReal (\d' -> if d>d' then () else error ("embedDouble" + show d + show d')) -- but it's not type safe)
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2021-03-29 16:40:57 <dolio> That description isn't real numbers, just like the other description wasn't natural numbers.
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2021-03-29 16:41:57 <dolio> Also the usual ordering on the reals doesn't have a bottom to be a domain.
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2021-03-29 16:42:58 <dolio> It's also not directed complete, I think.
2021-03-29 16:43:18 <Gurkenglas> dolio, yeah add -inf and inf

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