[Haskell-beginners] Confusing Show/print error

[Francesco Ariis]

Hello Lawrence,

Il 09 settembre 2021 alle 16:25 Galaxy Being ha scritto:
> import Data.Tuple
> fswp :: (a, b) -> (b, a)
> fswp = Data.Tuple.swap

this typechecks without problem.

maybe you invoked fswp without an argument? (i.e. `λ> fwsp`
instead of `λ> fwsp (1,'a')`)