"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. --Beman