[jcelerier]

I'm curious about how you could use https://celtera.github.io/avendish for this. I've developed it to enable very easily creating media processors with the little reflection we can do currently in c++20; in my mind data gathering would not be too dissimilar of a task.

It makes me really sad reading about the objections to pack indexing as this library needs it a LOT (and currently, doing it with std::get<> or similar is pretty pretty bad and does not scale at all past 200 elements in terms of build time, compiler memory usage & debug build size)