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

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