| // Copyright David Abrahams 2002. |
| // Distributed under the Boost Software License, Version 1.0. (See |
| // accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| #include <boost/python/module.hpp> |
| #include <boost/python/class.hpp> |
| #include <boost/python/return_value_policy.hpp> |
| #include <boost/python/manage_new_object.hpp> |
| #include <boost/python/reference_existing_object.hpp> |
| #include <boost/python/pure_virtual.hpp> |
| #include <boost/python/wrapper.hpp> |
| #include <boost/python/def.hpp> |
| #include <boost/python/call.hpp> |
| #include <boost/utility.hpp> |
| |
| #include <memory> |
| |
| #ifdef HELD_BY_AUTO_PTR |
| # define HELD_PTR(X) , std::auto_ptr< X > |
| #else |
| # define HELD_PTR(X) |
| #endif |
| |
| using namespace boost::python; |
| |
| struct P |
| { |
| virtual ~P(){} |
| virtual char const* f() = 0; |
| char const* g() { return "P::g()"; } |
| }; |
| |
| struct PCallback : P, wrapper<P> |
| { |
| char const* f() |
| { |
| #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
| return call<char const*>(this->get_override("f").ptr()); |
| #else |
| return this->get_override("f")(); |
| #endif |
| } |
| }; |
| |
| struct Q : virtual P |
| { |
| char const* f() { return "Q::f()"; } |
| }; |
| |
| struct A |
| { |
| virtual ~A(){} |
| virtual char const* f() { return "A::f()"; } |
| }; |
| |
| struct ACallback : A, wrapper<A> |
| { |
| char const* f() |
| { |
| if (override f = this->get_override("f")) |
| #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
| return call<char const*>(f.ptr()); |
| #else |
| return f(); |
| #endif |
| |
| return A::f(); |
| } |
| |
| char const* default_f() { return this->A::f(); } |
| }; |
| |
| struct B : A |
| { |
| virtual char const* f() { return "B::f()"; } |
| }; |
| |
| struct C : A |
| { |
| virtual char const* f() { return "C::f()"; } |
| }; |
| |
| struct D : A |
| { |
| virtual char const* f() { return "D::f()"; } |
| char const* g() { return "D::g()"; } |
| }; |
| |
| struct DCallback : D, wrapper<D> |
| { |
| char const* f() |
| { |
| if (override f = this->get_override("f")) |
| #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
| return call<char const*>(f.ptr()); |
| #else |
| return f(); |
| #endif |
| //else |
| return D::f(); |
| } |
| }; |
| |
| |
| A& getBCppObj () |
| { |
| static B b; |
| return b; |
| } |
| |
| char const* call_f(A& a) { return a.f(); } |
| |
| A* factory(unsigned choice) |
| { |
| switch (choice % 3) |
| { |
| case 0: return new A; |
| break; |
| case 1: return new B; |
| break; |
| default: return new C; |
| break; |
| } |
| } |
| |
| C& getCCppObj () |
| { |
| static C c; |
| return c; |
| } |
| |
| A* pass_a(A* x) { return x; } |
| |
| #ifdef HELD_BY_AUTO_PTR |
| BOOST_PYTHON_MODULE_INIT(polymorphism2_auto_ptr_ext) |
| #else |
| BOOST_PYTHON_MODULE_INIT(polymorphism2_ext) |
| #endif |
| { |
| class_<ACallback HELD_PTR(A),boost::noncopyable>("A") |
| .def("f", &A::f, &ACallback::default_f) |
| ; |
| |
| def("getBCppObj", getBCppObj, return_value_policy<reference_existing_object>()); |
| |
| class_<C HELD_PTR(C),bases<A>,boost::noncopyable>("C") |
| .def("f", &C::f) |
| ; |
| |
| class_<DCallback HELD_PTR(D),bases<A>,boost::noncopyable>("D") |
| .def("f", &D::f) |
| .def("g", &D::g) |
| ; |
| |
| def("pass_a", &pass_a, return_internal_reference<>()); |
| |
| def("getCCppObj", getCCppObj, return_value_policy<reference_existing_object>()); |
| |
| def("factory", factory, return_value_policy<manage_new_object>()); |
| |
| def("call_f", call_f); |
| |
| class_<PCallback,boost::noncopyable>("P") |
| .def("f", pure_virtual(&P::f)) |
| ; |
| |
| class_<Q HELD_PTR(Q), bases<P> >("Q") |
| .def("g", &P::g) // make sure virtual inheritance doesn't interfere |
| ; |
| } |
| |
| //#include "module_tail.cpp" |