cppyy passing arguments by name to C++ binding

[will-cern]

Feature description

Is it possible to support passing arguments by name to a C++ method in cppyy, including passing out of order and not passing all arguments if some are defaulted?

Here is an example:

import ROOT

ROOT.gInterpreter.ProcessLine("""
class MyClass {
public:
    class MyObj {
    public:
        MyObj(const char* in) : s(in) { }
        TString s;
    };
    void MyMethod(const MyObj& x="hello", bool opt=false, bool opt2=true) {
      std::cout << x.s << " " << opt << " " << opt2 << std::endl;
    }

};
""")

ROOT.MyClass().MyMethod(opt2=False,x="hi") # I'd like this to output "hi 0 0"

At the moment this produces:

File cppyy_default_compiler:1, in <module>

NameError: name 'false' is not defined

Thanks!

Alternatives considered

No response

Additional context

No response

[guitargeek]

I thought this was already working 🙂 But okay, if it's not working I agree we should support this 👍 This will help a lot in making C++ interfaces feel more pythonic without writing explicit pythonization wrappers.