Hi Robert,
"ordinary functions are fine but make sure you define a return_type typedef in your functions oh.. and make sure the return type of the operator()() is the same as that... " Then I have to add a way of sanely catching if they have not done this - I doubt I can... Crazy!
Why not define your code to take a boost::function<double(/* whatever goes here */)>?
That well be the way to go. It's worth a shot... I was (still am slightly) reluctant to do this for the following reasons. a) I think minimising interdependencies (#includ ing stuff) is a good idea, of course that grand idea got drop kicked out of the window ages ago. I'm #include <boost/....>'d to the eyeballs now, one more won't hurt! b) It's for a generic function timer code, for measuring the relative performance of functions. Therefore I wanted to try and keep any cruft surrounding the callee as minimal as possible -- at least until I can be reasonably sure it has no impact. I'll give it a bash and see, Cheers, -ed ------------------------------------------------ "No more boom and bust." -- Dr. J. G. Brown, 1997