On Jul 10, 2007, at 9:02 AM, Cédric Venet wrote:
2. I've run into the situation where parameters are truly optional - they don't specify default values, but optional components to an algorithm. What's the best way to implement this? How can I test (within a function) to determine if a parameter has been passed or not? I've hacked together an approach using a `not_given` struct. Is there something already like this in the library.
boost.optional should serve your purpose.
I had previously considered that as an option (no pun). Unfortunately, I don't think this helps if I choose to adopt a compile-time function selection. Otherwise, it would work very nicely at runtime. I've still got it on my short list of solutions. Thanks, Andrew Sutton asutton@cs.kent.edu