Re: [Haskell-cafe] Why is toRational a method of Real?

Yes, for instance to be able to use functions as number. Or to be able to use constructive real numbers as numbers, since equality is not computable. -- Lennart On Thu, Aug 5, 2010 at 4:17 AM, Ivan Lazar Miljenovic wrote:

On 5 August 2010 10:15, Lennart Augustsson wrote:

...

You're right.  It's bad to have toRational in Real.  It's also bad to have Show and Eq as superclasses to Num.

I understand why it's bad to have Show as a superclass, but why Eq? Because it stops you from using functions as numbers, etc. ?

-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com