Re: [boost] question BPL mapping

From: David Abrahams (abrahams_at_[hidden])
Date: 2001-04-09 07:16:30

Your code looks correct to me, except for that your world constructor takes
Data by value and you specified in initriskneut that it was passed by
const&.

Regards,
Dave

----- Original Message -----
From: "Xavier Warin" <xavier.warin_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Monday, April 09, 2001 3:40 AM
Subject: [boost] question BPL mapping

> I like to now if it is possible to map a python object to a C++ object
> and to use this object to construct
> a second object i want to bind with BPL.
>
> For example :
> // create the first object
> class Data {
> private :
>   const double w ;
> public :
>   Data(  double v  ) : w(v) {} ;
>   ~Data() {}
> } ;
>
> // create a second object : its constructor needs a Data object
> class world
> {
> private:
>   const double  tu ;
> public :
>   world(Data data, double ti) :tu(ti) {};
>  };
>
> // do the binding
> extern "C"
> void initriskneut()
> {
>   try
>   {
>     // Create an object representing this extension module.
>     python::module_builder this_module("alltest");
>
>     // Create the Python type object
>     boost::python::class_builder< Data > Data_class(this_module, "Data"
> );
>     Data_class.def(boost::python::constructor< double >());
>
>     // Create the Python type object for our extension class world
>     boost::python::class_builder<world> world_mod(this_module, "world");
>
>     // constructor
>     // How to define the mapping Between the Data python object (created
> via BPL) and the
>     // a Data C++ object to give to the constructor ?
>     world_mod(boost::python::constructor< const Data  & ,  double >());
>   }
>   catch(...)
>   {
>     boost::python::handle_exception(); // Deal with the exception for
> Python
>   }
> }
> Thank you for your help.
>
>
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