On Wed, Apr 06, 2005 at 06:41:56PM -0400, Beman Dawes wrote:
"Andras Erdei" <aerdei@gmail.com> wrote in message news:7fe28deb05040601041ad29463@mail.gmail.com...
my guess on the major usage of rational<> would be people burnt by floats making CAD, image processing, signal processing, statistical etc applications
One of the rational<> issues is "Should it be standardized?"
The LWG looked at rational<> for TR1, and decided that it would make more sense to consider it later, when a big int class was available. There is now a proposed big int class, so the rational<> question may come up again.
One of the questions that the LWG will as is "Are there enough real-world uses to justify the addition of rational<> to the Standard Library?"
Thus it might be helpful if real-world users (if any) of boost::rational would occasionally make themselves known.
I don't know if it qualifies as real-world, but CGAL (www.cgal.org) provides a Quotient<> class and uses it heavily. It is basically the same thing as boost::rational, although I have not checked the differences in detail, nor tried it. It is used together with big ints or big floats, mostly. As far as standardization is concerned, I think a big int class should go together with a big rational class (which can benefit from being template). -- Sylvain