[C++-sig] Calling python virtual function from C++ (original) (raw)

William Marié william.marie at gmail.com
Wed Jan 28 19:16:25 CET 2009

Hi,

I have a little problem, i can't find a way to call a pure virtual function from C++ on a Python object taking a specific class object as argument :

// Base Class for a component class BaseCmp { public: ~BaseCmp() {}; };

// Base class class Base { public: Base() {}; virtual ~Base() {}; virtual void testVirtualPure( BaseCmp* pBaseCmp ) = 0; };

struct BaseWrap : Base, bp::wrapper { void testVirtualPure( BaseCmp* pBaseCmp ) { this->get_override("testVirtualPure")( pBaseCmp ); } };

// Module TestScript BOOST_PYTHON_MODULE(test) { // BaseCmp Class exposition bp::class_<BaseCmp,boost::noncopyable>("BaseCmp", bp::no_init) ;

// Base Class Wrapper exposition
bp::class_<BaseWrap, boost::noncopyable>("Base")
    .def( "testVirtualPure", bp::pure_virtual( &Base::testVirtualPure ) )
    ;

}

I need to call my testVirtualPure function from C++ side : BaseCmp* bc = BaseCmp(); Base* b = Base(); b->testVirtualPure( bc );

But this causes an error : TypeError: No to_python (by-value) converter found for C++ type: class BaseCmp

Does someone know how i can do that ?

Thanks a lot

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