[C++-sig] Return value policies for objects with custom to-python converters

[Roman Yakovenko]

2008/10/2 Ravi <lists_ravi at lavabit.com>:
> Attached; hope you don't mind me using your code in my example.

No, I am glad you find it useful.

> Python code:
> import tuples
> x = tuples.get2() # works
> x = tuples.get1() # fails with conversion error
>

I could be wrong, but it seems to be Boost.Python bug. I would submit
bug report.

I thought about possible work around for you.

Basically you can wrap functionality that registers custom converters
and add that type to some global list. You can use
boost::python::type_info class for the type description.
Then you can create new call policy, that will query that list and
will execute library "reference_existing_object" or yours.

This solution is applicable if you have few types with custom
conversion and many functions.

HTH

-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/