From: Brian Candler <B.Candler@...>
Date: 2004-10-05T00:09:28+09:00
Subject: Re: Too Many Ways?

On Mon, Oct 04, 2004 at 11:46:15PM +0900, trans.  (T. Onoma) wrote:
> >   def foo(a,b,c=nil)
> >   end
> >   method(:foo).arity  # => -3
> >
> >   def bar(a,b,c=nil,d=nil,e=nil)
> >   end
> >   method(:bar).arity  # => -3
> >
> > It would be a nice use for ranges with infinite bounds, if they existed.
> 
> Exactly what I was thinking.

I can't see what's hard about implementing them: have a couple of constant
objects for positive and negative infinity (like 'true' and 'false').

Then define -@ method so that -INF == NEGINF, and away you go.

I'd be quite happy to have this just for ranges, although I expect everyone
would want them to integrate with numbers: 3 * INF == INF and so on.

Or can we use the Float 'Infinity' for this?

Regards,

Brian.