dict.sh

rivendell% stack ghci                                                                                                                          not sandboxed 
Configuring GHCi with the following packages: 
GHCi, version 8.0.1: http://www.haskell.org/ghc/  :? for help
Loaded GHCi configuration from /home/sdiehl/.ghci
Loaded GHCi configuration from /tmp/ghci18272/ghci-script
λ> class Foo a where { foo :: a -> Int }
λ> instance Foo () where { foo _ = 3 }
λ> bar = foo ()
λ> bar
3
λ> instance Foo () where { foo _ = 4 }
λ> bar
3