It's quite a nice idea, but I'm not too sure why anyone would want to use it. There are already a number of optimised and fully featured mathematical libraries out there. Without somesort a capability for algebraic manipulation, for example, the ability to determine the value of a variable within an equation given a number of relations (which coincidently would be really useful, but non-trivial to implement), the library basically amounts to some santatic sugar. What I find interesting, however, is the named associations for function arguments ( x -> 5 ), for example, but I think there is already a library in Boost that enables such functionality. S. -----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Stephen Gross Sent: 04 April 2006 18:29 To: Boost Subject: [Boost-users] Idea for equation library I've got an idea for a toolkit that uses boost::lambda to let you write 'equations' on the fly in c++. For instance, consider the following pseudo-code: ================== Equation e = x + y; print e(x -> 5, y -> 10) // Prints 15 e = x - y print e(x -> 5, y -> 10) // Prints -5 Equation d = eq(e) + z print d(x -> 1, y -> 2, z -> 3) // Prints 2 ================== The idea is that you can encapsulate an algebraic function in a standalone 'Equation' instance, and dynamically reassign that equation. It's built off of boost::lambda (of course), but it lets you name the variables rather than just refer to them with the standard placeholders (_1, _2, etc.). Is it worthwhile for me to post the toolkit code on this group? Thanks, --Steve Stephen Gross Case Western School of Medicine Cleveland, OH "By Grabthar's hammer, by the sons of Worvan, you shall be avenged." - Dr. Lazarus _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users