Yomm11 VS Yomm2

There was a YOMM11 written in C++11. It required the user to instrument the classes. Surprisingly, it is still being cloned, and someone even starred it recently.

More information about virtual_ptr is available in the documentation.

YOMM2 is available on GitHub.

And if you don't want to put a virtual function or have a base class, etc. check YOMM, which was recently mentioned in r/cpp.

I have a visitor themed example. I will update it to implement the visitor solution as well, for easier comparison.

the main README

I am publishing and documenting some of the internals of my YOMM2 library. I adopted the same style as cppreference.com. My library uses two constructs nested inside a class. cppreference documents template like this and their members like this. However, I use two constructs that are, AFAICT, not used in the standard library, so there is nothing for me to ape.

I don't know much of type theory, i'm just saying that i don't see when this could be useful in real life. On the other hand, multimethods such as what the Julia language has or, in C++, yomm2, sounds much more useful, as you can have two object *a, *b and calling f(a, b) will dispatch on the concrete type of all virtual arguments.