[Haskell-cafe] Way to implement toFloat :: (Num a) => a -> Float

[Niklas Haas]

On Thu, 12 Dec 2013 20:19:35 +0100, EatsKittens <temporalabstraction at gmail.com> wrote:
> Is there a way to add a method to a typeclass like num to implement this
> concept? A function that converts any number to floats?
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The typeclass Real has this in a slightly different form:

toRational :: Real a => a -> Rational

You can use fromRational :: Rational -> Float together with this to
implement your function.