Implemented pure_virtual(...)

[SVN r19774]

test/polymorphism.cpp

@@ -9,6 +9,7 @@
 #include <boost/python/manage_new_object.hpp>
 #include <boost/python/reference_existing_object.hpp>
 #include <boost/python/call_method.hpp>
+#include <boost/python/pure_virtual.hpp>
 #include <boost/python/def.hpp>
 #include <boost/utility.hpp>
 
@@ -20,6 +21,27 @@ struct Callback
     PyObject* mSelf;
 };
 
+struct P
+{
+    virtual ~P(){}
+    virtual std::string f() = 0;
+};
+
+struct PCallback : P, Callback
+{
+    PCallback (PyObject* self) : Callback(self) {}
+    
+    std::string f()
+    {
+        return call_method<std::string>(mSelf, "f");
+    }
+};
+
+struct Q : P
+{
+    std::string f() { return "Q::f()"; } 
+};
+
 struct A
 {
     virtual ~A(){}
@@ -44,7 +66,7 @@ struct ACallback :  A,  Callback
 
 struct B : A
 {
-    virtual std::string f() { return "B::f()"; }
+    virtual std::string f() { return "B::f()"; } 
 };
 
 struct C : A
@@ -127,6 +149,13 @@ BOOST_PYTHON_MODULE_INIT(polymorphism_ext)
     def("factory", factory, return_value_policy<manage_new_object>());
 
     def("call_f", call_f);
+
+    class_<P,boost::noncopyable,PCallback>("P")
+        .def("f", pure_virtual(&P::f))
+        ;
+
+    class_<Q, bases<P> >("Q")
+        ;
 }
 
 //#include "module_tail.cpp"