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110 lines
2.9 KiB
110 lines
2.9 KiB
/*
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example/example5.cpp -- inheritance, callbacks, acquiring and releasing the
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global interpreter lock
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Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#include "example.h"
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#include <pybind11/functional.h>
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class Pet {
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public:
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Pet(const std::string &name, const std::string &species)
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: m_name(name), m_species(species) {}
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std::string name() const { return m_name; }
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std::string species() const { return m_species; }
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private:
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std::string m_name;
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std::string m_species;
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};
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class Dog : public Pet {
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public:
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Dog(const std::string &name) : Pet(name, "dog") {}
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void bark() const { std::cout << "Woof!" << std::endl; }
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};
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class Rabbit : public Pet {
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public:
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Rabbit(const std::string &name) : Pet(name, "parrot") {}
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};
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void pet_print(const Pet &pet) {
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std::cout << pet.name() + " is a " + pet.species() << std::endl;
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}
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void dog_bark(const Dog &dog) {
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dog.bark();
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}
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bool test_callback1(py::object func) {
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func.call();
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return false;
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}
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int test_callback2(py::object func) {
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py::object result = func.call("Hello", 'x', true, 5);
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return result.cast<int>();
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}
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void test_callback3(const std::function<int(int)> &func) {
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cout << "func(43) = " << func(43)<< std::endl;
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}
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std::function<int(int)> test_callback4() {
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return [](int i) { return i+1; };
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}
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void init_ex5(py::module &m) {
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py::class_<Pet> pet_class(m, "Pet");
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pet_class
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.def(py::init<std::string, std::string>())
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.def("name", &Pet::name)
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.def("species", &Pet::species);
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/* One way of declaring a subclass relationship: reference parent's class_ object */
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py::class_<Dog>(m, "Dog", pet_class)
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.def(py::init<std::string>());
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/* Another way of declaring a subclass relationship: reference parent's C++ type */
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py::class_<Rabbit>(m, "Rabbit", py::base<Pet>())
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.def(py::init<std::string>());
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m.def("pet_print", pet_print);
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m.def("dog_bark", dog_bark);
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m.def("test_callback1", &test_callback1);
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m.def("test_callback2", &test_callback2);
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m.def("test_callback3", &test_callback3);
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m.def("test_callback4", &test_callback4);
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/* Test cleanup of lambda closure */
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struct Payload {
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Payload() {
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std::cout << "Payload constructor" << std::endl;
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}
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~Payload() {
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std::cout << "Payload destructor" << std::endl;
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}
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Payload(const Payload &) {
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std::cout << "Payload copy constructor" << std::endl;
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}
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Payload(Payload &&) {
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std::cout << "Payload move constructor" << std::endl;
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}
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};
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m.def("test_cleanup", []() -> std::function<void(void)> {
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Payload p;
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return [p]() {
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/* p should be cleaned up when the returned function is garbage collected */
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};
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});
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}
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