shithub: MicroHs

ref: 7f46be28c1bc76a5861bcea0fa1ca8254468d6a3
dir: /lib/System/IO/PrintOrRun.hs/

View raw version 
-- Copyright 2023,2024 Lennart Augustsson
-- See LICENSE file for full license.
module System.IO.PrintOrRun(PrintOrRun(..)) where
import Prelude()              -- do not import Prelude
import Primitives
import System.IO
import Text.Show

-- Helper for interactive system
class PrintOrRun a where
  printOrRun :: a -> IO ()

instance PrintOrRun (IO ()) where
  printOrRun a = a

instance forall a . Show a => PrintOrRun a where
  printOrRun a = putStrLn (show a)