The first and third work, but not the second. Why?
Michael
==============
f :: String -> IO ()
f s = do putStrLn s
{-
g :: [String] -> IO ()
g l = do s <- l
putStrLn s
-}
{-
h :: [Int] -> [Int]
h l = do i <- l
return (i+1)
-}
==============
serialize2.hs:29:9:
Couldn't match expected type `[String]'
against inferred type `IO String'
In a stmt of a 'do' expression: s <- l
In the expression:
do { s <- l;
putStrLn s }
In the definition of `g':
g l = do { s <- l;
putStrLn s }
_______________________________________________
Haskell-Cafe mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/haskell-cafe
