[Haskell-cafe] Yet another stupid question about numeric conversion

Lennart Augustsson lennart at augustsson.net
Tue Aug 21 13:09:23 EDT 2007

How can you hope to convert an arbitrary Num to a Float?
Num contains things like complex numbers that don't have any reasonable
translation to a Float.
But anyway, realToFrac is a good conversion function.

  -- Lennart

On 8/21/07, Peter Verswyvelen <bf3 at telenet.be> wrote:
> Does a general approach exist to convert any non-constant (Num a) to a
> Float? Not using type annotation of course.
> Now I wrote a Convert class that has a toFloat function which I
> instantiate
> for all different numeric types, but as all these toFloat/toInt functions
> disappeared a long time ago from Haskell, it feels like a bad idea to
> reintroduce them locally in my code...
> Thanks (again!)
> Peter Verswyvelen
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