pybind11/tests/test_callbacks.cpp

123     struct MovableObject {
126         MovableObject() = default;
127         MovableObject(const MovableObject &) = default;
128         MovableObject &operator=(const MovableObject &) = default;
129         MovableObject(MovableObject &&o) : valid(o.valid) { o.valid = false; }
130         MovableObject &operator=(MovableObject &&o) {
136     py::class_<MovableObject>(m, "MovableObject");
139     m.def("callback_with_movable", [](std::function<void(MovableObject &)> f) {
140         auto x = MovableObject();