X-Git-Url: https://git.rmz.io/my-scheme.git/blobdiff_plain/537e327f072fb094316845a5e3105f4fbb1aa385..5988ad89d4dd34b63abf5512ce3308ed86ff279d:/app/Main.hs

diff --git a/app/Main.hs b/app/Main.hs
index 88ae7f7..01fd038 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -9,6 +9,7 @@ data LispVal = Atom String
              | Number Integer
              | String String
              | Bool Bool
+             deriving Show
 
 symbol :: Parser Char
 symbol = oneOf "!#$%&|*+-/:<=>?@^_~"
@@ -34,9 +35,9 @@ parseAtom = do
                 _    -> Atom atom
 
 parseNumber :: Parser LispVal
-parseNumber = many1 digit >>= \ ds ->
-              let a = read ds
-              in return $ Number a
+parseNumber = do ds <- many1 digit
+                 let a = read ds
+                 return $ Number a
 
 parseExpr :: Parser LispVal
 parseExpr = parseString
@@ -46,7 +47,7 @@ parseExpr = parseString
 readExpr :: String -> String
 readExpr input = case parse parseExpr "lisp" input of
     Left err -> "No match: " ++ show err
-    Right val -> "Found value"
+    Right val -> "Found value: " ++ show val
 
 main :: IO ()
 main = do