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