fork download
copy 
  1. import qualified Prelude
  2. import Prelude hiding (Maybe)
  3.  
  4. class Maybe a
  5.  
  6. newtype Just a = Just a
  7. data Nothing a = Nothing
  8.  
  9. instance Maybe (Just a)
  10. instance Maybe (Nothing a)
  11.  
  12. main = print "ok"
Success #stdin #stdout 0.01s 5520KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
"ok"
https://ideone.com/wE58V4
language:
Haskell (ghc 8.4.4)
created:
2 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!