> Michael Marte wrote:
>
> > I have a simple problem but it seems to be quite involved: I want to print
> > floating point numbers with a given number of decimal points.
> >
> > First, I found out that both ghc and hugs do not consider the precision
> > argument to showPrec.
>
> What precision argument? There's a precedence argument, but the precision
> is news to me...
The library report defines:
class Show a where
showsPrec :: Int -> a -> ShowS
show :: a -> String
showList :: [a] -> ShowS
showsPrec _ x s = show x ++ s
show x = showsPrec 0 x ""
I always thought that the Int argument to showsPrec is the precision.
So what is it good for? The library report does not explain it.
Michael
