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123 lines
3.8 KiB
123 lines
3.8 KiB
/*
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tests/test_inheritance.cpp -- inheritance, automatic upcasting for polymorphic types
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Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.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 "pybind11_tests.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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std::string bark() const { return "Woof!"; }
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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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class Hamster : public Pet {
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public:
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Hamster(const std::string &name) : Pet(name, "rodent") {}
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};
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class Chimera : public Pet {
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Chimera() : Pet("Kimmy", "chimera") {}
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};
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std::string pet_name_species(const Pet &pet) {
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return pet.name() + " is a " + pet.species();
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}
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std::string dog_bark(const Dog &dog) {
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return dog.bark();
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}
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struct BaseClass { virtual ~BaseClass() {} };
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struct DerivedClass1 : BaseClass { };
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struct DerivedClass2 : BaseClass { };
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struct MismatchBase1 { };
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struct MismatchDerived1 : MismatchBase1 { };
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struct MismatchBase2 { };
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struct MismatchDerived2 : MismatchBase2 { };
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test_initializer inheritance([](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, Pet>(m, "Rabbit")
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.def(py::init<std::string>());
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/* And another: list parent in class template arguments */
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py::class_<Hamster, Pet>(m, "Hamster")
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.def(py::init<std::string>());
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py::class_<Chimera, Pet>(m, "Chimera");
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m.def("pet_name_species", pet_name_species);
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m.def("dog_bark", dog_bark);
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py::class_<BaseClass>(m, "BaseClass").def(py::init<>());
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py::class_<DerivedClass1>(m, "DerivedClass1").def(py::init<>());
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py::class_<DerivedClass2>(m, "DerivedClass2").def(py::init<>());
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m.def("return_class_1", []() -> BaseClass* { return new DerivedClass1(); });
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m.def("return_class_2", []() -> BaseClass* { return new DerivedClass2(); });
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m.def("return_class_n", [](int n) -> BaseClass* {
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if (n == 1) return new DerivedClass1();
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if (n == 2) return new DerivedClass2();
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return new BaseClass();
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});
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m.def("return_none", []() -> BaseClass* { return nullptr; });
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m.def("test_isinstance", [](py::list l) {
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struct Unregistered { }; // checks missing type_info code path
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return py::make_tuple(
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py::isinstance<py::tuple>(l[0]),
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py::isinstance<py::dict>(l[1]),
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py::isinstance<Pet>(l[2]),
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py::isinstance<Pet>(l[3]),
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py::isinstance<Dog>(l[4]),
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py::isinstance<Rabbit>(l[5]),
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py::isinstance<Unregistered>(l[6])
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);
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});
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m.def("test_mismatched_holder_type_1", []() {
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auto m = py::module::import("__main__");
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py::class_<MismatchBase1, std::shared_ptr<MismatchBase1>>(m, "MismatchBase1");
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py::class_<MismatchDerived1, MismatchBase1>(m, "MismatchDerived1");
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});
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m.def("test_mismatched_holder_type_2", []() {
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auto m = py::module::import("__main__");
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py::class_<MismatchBase2>(m, "MismatchBase2");
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py::class_<MismatchDerived2, std::shared_ptr<MismatchDerived2>, MismatchBase2>(m, "MismatchDerived2");
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});
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});
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