overload_cast | C14 syntax sugar for overload resolution | Reflection library

I'm building a ml project which will use tensorflow, game rule set controlled by c++ library and python players.

I decided to use pybind as translation layer between game rules engine and control layer with players.

Here are classes that I tried to wrap with pybind:

I have the following setup (1 Base class, 1 Derived class, 1 Container). The container takes a shared_ptr as an input.

I have a class that is quite similar to an STL-vector (the differences are not important for the pybind11 type caster, so I will ignore them here). I have written a type caster for this class. A minimal working example of my code is given below. An example showing the problem is included below the code.

The problem is that my caster is quite limited (because I have used py::array_t). In principle the interface does accept tuples, lists, and numpy-arrays. However, when I overload based on typename, the interface fails for inputted tuples and lists (simply the first overload is selected even though it is the incorrect type).

My question is: How can I make the type caster more robust? Is there an effective way to re-use as much as possible existing type casters for STL-vector-like classes?

I am having trouble overloading class member functions that are marked const, while there is no problem when the functions are not marked const. Also the overload itself works fine in pure C++.

The following fails

I have found a specific case in which the overload_cast fails, and I have no idea how to solve this.

A minimal example that shows the behavior is