The complicated parts of boost where this is what you end up doing are really more like libraries for library writers. You'd almost certainly wrap something lik

The complicated parts of boost where this is what you end up doing are really more like libraries for library writers. You'd almost certainly wrap something like Boost.Geometry for your specific needs. It's made with flexibility as the goal. So it's really not the problem you're presenting. The alternative is dozens of different half-baked libraries for specific use cases.