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Pass string to edit in terminal and confirm with enter-key in Haskell program

Is there a way to "print" a string in terminal and the user can edit this string and press Enter to confirm and pass it back into program?

Solution

  • Yes, using haskeline (a readline-style library). It has the function getInputLineWithInitial which has the behavior you are asking for. Example:

    import System.Console.Haskeline

main = do
  result <- runInputT defaultSettings $ getInputLineWithInitial ""
     ("Pass string to edit in terminal ", "in Haskell program")
  print result