User-defined conversion operators overloads (typecasts)

[lczech]

Hey @lyskov,

quick question: The Limitations of Binder mention that type casting operators operator T() are ignored. Looking at the implementation in Binder for operator overloads though, it seems thought that at least some common type conversions might be possible, by mapping for instance __bool__, __int__, __float__, __complex__, __str__ to their respective C++ equivalents? Unless I'm missing something, adding those to the map in Binder's cpp_python_operator might just already out of the box, or not?

Of course, custom types would not be supported, but I think at least for those common ones, it might make sense!

Edit: For __str__, there is already an overload in Binder when an operator << is defined for a class, so that might conflict. On the other hand, it seems that Binder does not generate any code that uses __repr__, so maybe that can be used for the operator << instead? Or just kept as overloads in Python as well, if that works?

Let me know what you think, and thanks
Lucas

[lyskov]

Do you mean provide bindings for C++ member type-conversion operators? If so then yes, I think this can be done. I do not think the complex approach used for __str__ is needed though since one can just check for relevant member function definition...