Yeah, I figured as much, but the code is copied right off the referenced page.
Michael --- On Thu, 8/26/10, Ivan Lazar Miljenovic <[email protected]> wrote: From: Ivan Lazar Miljenovic <[email protected]> Subject: Re: [Haskell-cafe] On to applicative To: "michael rice" <[email protected]> Cc: [email protected] Date: Thursday, August 26, 2010, 2:02 AM On 26 August 2010 15:56, michael rice <[email protected]> wrote: > > From: http://en.wikibooks.org/wiki/Haskell/Applicative_Functors > > ============================= > import Control.Applicative > > f :: (a -> b -> c) > fmap :: Functor f => (d -> e) -> f d -> f e > fmap f :: Functor f => f a -> f (b -> c) -- Identify d with a, and e with > (b -> c) > > sumsqr :: Int -> Int -> Int -- my f > sumsqr i j = i*i+j*j > ============================= The line with the error is the one beginning with "fmap f :: ..."; you can't provide a variable/parameter on the left hand side of the :: Also, why are you trying to re-define fmap? -- Ivan Lazar Miljenovic [email protected] IvanMiljenovic.wordpress.com
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