[Haskell-cafe] Implementation of scaled integers

[Twan van Laarhoven]

Stefan Heinzmann wrote:

> Hi all,
> 
> is there a library for Haskell that implements scaled integers, i.e.
> integers with a fixed scale factor so that the scale factor does not
> need to be stored, but is part of the type?

Data.Fixed [1] does exactly that, only it is based on Integer. Using 
fixed point with finite sized integers is more tricky, because you have 
to be careful not to get overflows in intermediate results.

Twan


[1] http://haskell.org/ghc/docs/latest/html/libraries/base/Data-Fixed.html