[Cpptool-cvs] rfta/include/xtl/python ExposeEnumerator.h,NONE,1.1

[<bl...@us...>]

Update of /cvsroot/cpptool/rfta/include/xtl/python
In directory sc8-pr-cvs1:/tmp/cvs-serv25288/include/xtl/python

Added Files:
	ExposeEnumerator.h 
Log Message:
* added ExposeEnumerator to expose a Enumerato as a python iterator.

--- NEW FILE: ExposeEnumerator.h ---
#ifndef PYRFTA_EXPOSE_ENUMERATOR_H_INCLUDED
#define PYRFTA_EXPOSE_ENUMERATOR_H_INCLUDED

#include <boost/python.hpp>
#include <xtl/Enumerator.h>


namespace Xtl { namespace Python {


class ExposeEnumeratorInit
{
public:
   ExposeEnumeratorInit()
   {
      static Initializer dummy;
   }

   static void 
   translate_EnumeratorError( const Xtl::EnumeratorError &e )
   {
       // Use the Python 'C' API to set up an exception object
       PyErr_SetString( PyExc_StopIteration, e.what() );
   }

private:
   class Initializer
   {
   public:
      Initializer()
      {
         boost::python::register_exception_translator<Xtl::EnumeratorError>( &translate_EnumeratorError );
      }
   };
};



/** Use this to expose a Xtl::Enumerator to python.
 * For example,
 * \code
 * Xtl::Python::ExposeEnumerator<StatementPtr>( "StatementEnumerator" );
 * \endcode
 * will expose the class Xtl::Enumerator<StatementPtr> to python as a python iterator.
 */
template<typename EnumeratedType>
class ExposeEnumerator : private ExposeEnumeratorInit
{
public:
   typedef Xtl::Enumerator<EnumeratedType> WrappedEnumerator;

   ExposeEnumerator( const char *name )
   {
      boost::python::class_< WrappedEnumerator >( "StatementEnumerator" )
         .def( "next", &WrappedEnumerator::getNext )
         .def( "__iter__", &Enumerator_iter )
         ;
   }

private:
   static WrappedEnumerator
      Enumerator_iter( const WrappedEnumerator &enumerator )
   {
      return enumerator;
   }
};


} }  // namespace Xtl { namespace Python

#endif // PYRFTA_EXPOSE_ENUMERATOR_H_INCLUDED