[Haskell-cafe] Convert a function to a string of operators?

Erik Hesselink hesselink at gmail.com
Fri Mar 11 10:28:16 CET 2011

On Thu, Mar 10, 2011 at 13:34, Lyndon Maydwell <maydwell at gmail.com> wrote:
>> Will methods explained here work for boolean expressions?
> The convenience of defining using specialised datatypes for
> serialising numeric operations comes from Num being a typeclass. This
> is not the case for Bool:
> Prelude> :info Num
> class (Eq a, Show a) => Num a where
>  (+) :: a -> a -> a
>   ... -- Defined in GHC.Num
> Prelude> :info Bool
> data Bool = False | True        -- Defined in GHC.Bool

If you want something like this for Bool (and other standard data
types) have a look at the Awesome Prelude [1]. It is an implementation
of the prelude where each data type is a type class.


[1] http://tom.lokhorst.eu/2010/02/awesomeprelude-presentation-video

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