Hi, Aleksey and I are trying to think of a simple metaprogramming problem which we could use as a sort of "Hello World" example for the MPL. This seems to be a rather hard problem. Aside from being short, a C++ "hello, world" introduces only two library components, cout and endl (three if you count operator<<), the problem it solves, "printing something", is most programmers will want to do, and it gives a small rush of excitement when you see it work.
However, it's hard to "see a metaprogram work" except by error/warning, and it's hard to demonstrate much of any practical use with a very small number of library components. Some of the simplest jobs involve numerical computation at compile-time, but I don't really want to show that right off the bat because: a) of the syntactic/mental overhead of using the type wrappers b) The eye is easily confused by code which mixes placeholders (e.g. "_1") in expressions with numeric constants (e.g. "2"). Thoughts? -- David Abrahams [EMAIL PROTECTED] * http://www.boost-consulting.com Boost support, enhancements, training, and commercial distribution _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost