app/Main.hs

   1 module Main where
   2 import Text.ParserCombinators.Parsec
   3 import System.Environment
   4
   5 symbol :: Parser Char
   6 symbol = oneOf "!#$%&|*+-/:<=>?@^_~"
   7
   8 readExpr :: String -> String
   9 readExpr input = case parse symbol "lisp" input of
  10     Left err -> "No match: " ++ show err
  11     Right val -> "Found value"
  12
  13 main :: IO ()
  14 main = do
  15     args <- getLine
  16     putStrLn (readExpr args)