[C++-sig] re: implicitly_convertible

[aashish]

Hi, 

 

I have this porgram where I need to convert a python float in to C++ class
object and for that I am using implicitly_convertible

 

In the porgram below (a very simple one) the constructor takd two arguments
and when I compile with that I got this error ..

 

c:\users\aashish\boost-1.30.2\boost\python\converter\implicit.hpp(34): error
C2664: 'PlotVariableTable::PlotVariableTable(const PlotVariableTable &)' :
cannot convert parameter 1 from 'const double' to 'const PlotVariableTable
&'

 

Now when I compiled and tested with the constructor taking only a single
value (and hence changed some lines accordingly) program just worked fine. 

 

Please let know is someone can help me as soon as possible. 

 

Thanks, 

Aashish 

 

 

  

#include <boost/any.hpp>

#include <boost/python.hpp>

#include <boost/python/extract.hpp>

#include <boost/python/dict.hpp>

#include <boost/any.hpp>

#include <boost/python/implicit.hpp>

#include <boost/python/module.hpp>

 

#include <cstdio>

#include<iostream>

//#include <PlotVariableTable.h>

 

 

using namespace boost::python;

namespace bp = boost::python;

 

 

class PlotVariableTable

{  

 

 

 

 

      public:

      

      /**

       * Default Constructor

       * 

       * @param   cols        number of columns in the table

       */

            PlotVariableTable(double rows, double cols):v(rows), v1(cols){}

            double v, v1;

};

 

PlotVariableTable make_x(double n, double n1)

{

      PlotVariableTable a = PlotVariableTable( n , n1); 

      return a;

}

 

 

BOOST_PYTHON_MODULE(hello)

{

      def("make_x",make_x);

      

      class_<PlotVariableTable>("PlotVariableTable",init<double, double>());

      

      implicitly_convertible<double,PlotVariableTable>();

      

}

 

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