[Haskell-cafe] A really bad way to say "all isSpace"

[Neil Mitchell]

Hi,

Reading through the code to read:

read s          =  case [x | (x,t) <- reads s, ("","") <- lex t] of
            [x] -> x
            []  -> error "Prelude.read: no parse"
            _   -> error "Prelude.read: ambiguous parse"

Reading through the code to lex, it appear that it will return
[("","")] if and only if all isSpace t.

If this is really the case, does it make sense to state all isSpace t?
It has a much clearer meaning to me.

Thanks

Neil