[C++-sig] Boost.Python v2: implicit conversion support

[Martin Casado]

> --- David Abrahams <david.abrahams at rcn.com> wrote:
> > Support for C++ implicit conversions has now been added to the v2
> > codebase. Please see libs/python/test/implicit.* for examples.
>
> Cool!
> Could this mechanism also be used to convert, e.g., python tuples
> to std::vector?

Ralf,

  I wrote a conversion mechanism for python sequence types to c++
  container types using boost type coersion.  It works pretty well,
  however I was having troubles with recursive types, i.e. lists of
  lists and haven't had the time to look back into that.  If you are
  interested I can forward you my code.

                    ~~m

> implicitly_convertible<boost::python::tuple, std::vector<double> >();
>
> I guess not since there is no appropriate C++ implicit conversion.
> What about something like this:
>
> struct my_converter_type {
>   operator()(const boost::python::tuple& t, std::vector<double>& v) const
>   {
>     // convert the elements of the tuple and store in v
>   };
> };
>
> implicitly_convertible<
>   boost::python::tuple,
>   std::vector<double>,
>   my_converter_type>();
>
> Thanks,
>         Ralf
>
>
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