Question

Is it possible to send lua-function to a main C++ program like this?

function a()
    ... -- do something
end

cpp_exported_function(a);

Or better, like this?

cpp_exported_function(function () .... end);

And how do I call it from the main program?
If it is possible – use lua table the same way. I mean exported_function(table);?

Answer 1

Yes – you’d have a C++ function that accepts a luabind::object as a parameter in both those cases. Luabind defines operator[] (for indexing a table) and operator() (for calling a function) for luabind::object for exactly that reason. See the documentation here: http://www.hci.iastate.edu/~rpavlik/doxygen/luabind/docs.html#object