[Haskell-cafe] First time haskell - parse error!

[S. Doaitse Swierstra]

On 9 mrt 2010, at 20:04, boblettoj wrote:

> 
> Hi, i am getting an error when trying to compile this part of my program, its
> my first time using haskell and as lovely as it is it didn't give me very
> much to go on in the error message!
> 
> <code>score :: String -> String -> String
> score [s] [] = false
> score [s] [g] = 
> 	if valid 4 g
> 	then (s1 ++ s2 ++ s3 ++ s4) where
> 		s1 = "Golds "
> 		s2 = show (gold s g)
> 		s3 = ", Silvers "
> 		s4 = show (silver s g)
> 	else "Bad Guess"</code>

If you want to keep the definitions local to the expression you should write

     then let s1 = ..
              s2 = ...
              ...
          in (s1++s2++s3++s4)
     else ...

Doaitse


> 
> when i try to compile it says: test.hs 63:29: parse error on input 'where'
> (its the line beginning with 'then')
> Anybody got any ideas whats going on?
> thanks!
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