sample02.cpp

#include <pybind11/pybind11.h>

int add(int a, int b) { return a + b; }

class Animal {
public:
	virtual ~Animal() {}
	virtual std::string go(int n_times) = 0;
};

class Dog : public Animal {
	std::string go(int n_times) override {
		std::string result;
		for (int i = 0; i < n_times; i++) {
			result += u8"ワン! ";
		}
		return result;
	}
};

class PyAnimal : public Animal {
public:
	using Animal::Animal;

	std::string go(int n_times) override {
		PYBIND11_OVERLOAD_PURE(std::string, Animal, go, n_times);
	}
};

std::string call_go(Animal* animal) { return animal->go(3); }

namespace py = pybind11;

PYBIND11_PLUGIN(sample02) {
	py::module m("sample02", "pybind11 module sample.");

	m.def("add", &add, u8"2つの数値を足し合わせます");

	py::class_<Animal, PyAnimal> animal(m, "Animal");
	animal.def(py::init<>()).def("go", &Animal::go);

	py::class_<Dog> dog(m, "Dog", animal);
	dog.def(py::init<>());

	m.def("call_go", &call_go);

	return m.ptr();
}