X-Git-Url: https://git.rmz.io/my-scheme.git/blobdiff_plain/200ca1efa940b94af2099828c36d6580addb6de9..HEAD:/app/Main.hs?ds=inline

diff --git a/app/Main.hs b/app/Main.hs
index 996f921..78f37ea 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -11,7 +11,6 @@ data LispVal = Atom String
              | String String
              | Character Char
              | Bool Bool
-             deriving Show
 
 symbol :: Parser Char
 symbol = oneOf "!#$%&|*+-/:<=>?@^_~"
@@ -96,6 +95,7 @@ readExpr input = case parse parseExpr "lisp" input of
     Left err -> "No match: " ++ show err
     Right val -> "Found value: " ++ showVal val
 
+instance Show LispVal where show = showVal
 showVal :: LispVal -> String
 showVal (Atom atom)   = atom
 showVal (List list)   = "(" ++ unwordsList list ++ ")"