Function wrap

tests/test_pickling.cpp:32–56

struct SimpleCppDerived : SimpleBase {};

void wrap(py::module m) {
    py::class_<SimpleBase, SimpleBaseTrampoline>(m, "SimpleBase")
        .def(py::init<>())
        .def_readwrite("num", &SimpleBase::num)
        .def(py::pickle(
            [](const py::object &self) {
                py::dict d = py::getattr(self, "__dict__", py::dict());
                return py::make_tuple(self.attr("num"), d);
            },
            [](const py::tuple &t) {
                if (t.size() != 2) {
                    throw std::runtime_error("Invalid state!");
                }
                auto cpp_state = std::unique_ptr<SimpleBase>(new SimpleBaseTrampoline);
                cpp_state->num = t[0].cast<int>();
                auto py_state = t[1].cast<py::dict>();
                return std::make_pair(std::move(cpp_state), py_state);
            }));

    m.def("make_SimpleCppDerivedAsBase",
          []() { return std::unique_ptr<SimpleBase>(new SimpleCppDerived); });
    m.def("check_dynamic_cast_SimpleCppDerived", [](const SimpleBase *base_ptr) {
        return dynamic_cast<const SimpleCppDerived *>(base_ptr) != nullptr;
    });
}

} // namespace exercise_trampoline