What Haskell users are actively maintaining or deving software using ghc <8

[amindfv at gmail.com]

> El 27 may 2020, a las 18:19, Joseph C. Sible <josephcsible at gmail.com> escribió:
> 
> On Wed, May 27, 2020 at 5:27 PM Henning Thielemann
> <lemming at henning-thielemann.de> wrote:
>> 
>> I am not giving up anything, because I test my code against both 7.4.2 AND
>> newer GHC versions.
> 
> You're giving up the ability to use every new feature introduced since
> then, since using them would mean your code stops working under 7.4.2.
> 
>> What linter can easily catch "instance Foldable ((,) a)"?
> 
> HLint can: for example, if you run hlint on a file containing "foo =
> maximum (4,2)", it says "Warning: Using maximum on tuple"
> 

maxRatio l = maximum l / toEnum (length l)

main = do
   print $ maxRatio [1..5]
   -- Imagine after some refactoring you're passing around a tuple instead:
   print $ maxRatio ([1..5], 5)