Re: [Haskell-cafe] How do I include polymorphic function type signatures in a data element ?

On Tue, 20 Jul 2004, Crypt Master wrote:

Exmaple:

<CODE> type Fitness = Integer data Population a = Population [(Fitness, a)] deriving (Show)

data GAParams = GAParams { randomNums :: [Integer] , someFunc :: (Int->Int->(Population a))} </CODE>

Like for 'Population a' you have to specify a type parameter for 'GAParams', i.e. | v data GAParams a = GAParams { randomNums :: [Integer] , someFunc :: (Int->Int->(Population a))}