Hi group, Some time ago I've written a set of class templates for bounded types (types whose variables may hold a value only from within a specified range). You can download the sources at http://www.rk.w.pl/progz/bounded. I've created a thread in comp.lang.c++.moderated (http://groups-beta.google.com/group/comp.lang.c++.moderated/browse_frm/thre ad/0298fc4ac6c6d223/) as I was hoping to work the project on and maybe transform it into a proposal for the C++0x standard library, but unfortunately the feedback was very low. Just today I saw in this newsgroup a thread titled "Checked Integral Class" concerning a very similar facility so I'm writing this post to call attention to my implementation. Maybe it would be better to include such class templates in Boost first, and then think about making a proposal for the C++ standard... Unfortuantely there's no documentation yet as this is only a sketch for further refinements, but comments in the code and posts in comp.lang.c++.moderated may answer some of your questions about design decisions and usage. If not then please ask them here or on comp.lang.c++.moderated. Any comments and suggestions are welcome. I hope there are more people who need such a facility and would like to work on it, let's finally do it - C++ lacks bounded types and it's high time to fix that! ;-) Best regards, Robert Kawulak -=##############=- <gg> 6934572 </gg> <gsm> 603654215 </gsm> <www> www.rk.w.pl </www> -=##############=- "I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones." - Albert Einstein