[C++-sig] Re: return value policy for returning same python object...

[David Abrahams]

Nikolay Mladenov <nickm at sitius.com> writes:

> What do you think about the following?
>
> namespace boost { namespace python
> {
>      struct return_self : default_call_policies
>     {
>         static PyObject* postcall(PyObject *args, PyObject* ){
>             return incref(PyTuple_GetItem(args,0));
>         }
>         struct result_converter
>         {
>             template <class T> struct apply{
>                 struct type{
>                     static bool convertible() {return true;}
>                     PyObject *operator()(T) const {return 0;}
                                           ^
I'd like to see ---------------------------^

    typename add_reference<typenameadd_const<T>::type>::type

right here.

>                 };
>             };
>         };
>     };
> }}

Otherwise, it looks great!  If you'd like to write an HTML page for
the reference manual and modify one of the tests to exercise it, I'd
be happy to add it to the system.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com