Brad Roberts: > Abs _should_ be pure. If the type being passed to it is incapable performing > the algorithm purely, then the type isn't valid to be used with abs.
I agree. On the other hand if you use multiprecision GNU numbers, your large numbers aren't immutable, you are able to change their sign in-place. Is it an abs() or something different like inplaceAbs()? Bye, bearophile
