Supposing I have the following code: > module Main(main) where > main = putStr (show [])
I will get these errors from GHC and Hugs respectively: > Main.hs:2:16: > Ambiguous type variable `a' in the constraint: > `Show a' arising from a use of `show' at Main.hs:2:16-22 > Probable fix: add a type signature that fixes these type variable(s) > ERROR "src/Main.hs":2 - Unresolved top-level overloading > *** Binding : main > *** Outstanding context : Show b But if I change my code to the following, it will compile. > module Main(main) where > main = putStr (show [1]) I have no problems typing in "putStr (show [])" in Hugs... runs fine. So what's wrong? I've really tried hard to think of an explanation, but with no luck.. Thanks, Benjamin _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe