| /* |
| example/example9.cpp -- nested modules, importing modules, and |
| internal references |
| |
| Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch> |
| |
| All rights reserved. Use of this source code is governed by a |
| BSD-style license that can be found in the LICENSE file. |
| */ |
| |
| #include "example.h" |
| |
| void submodule_func() { |
| std::cout << "submodule_func()" << std::endl; |
| } |
| |
| class A { |
| public: |
| A(int v) : v(v) { std::cout << "A constructor" << std::endl; } |
| ~A() { std::cout << "A destructor" << std::endl; } |
| A(const A&) { std::cout << "A copy constructor" << std::endl; } |
| std::string toString() { return "A[" + std::to_string(v) + "]"; } |
| private: |
| int v; |
| }; |
| |
| class B { |
| public: |
| B() { std::cout << "B constructor" << std::endl; } |
| ~B() { std::cout << "B destructor" << std::endl; } |
| B(const B&) { std::cout << "B copy constructor" << std::endl; } |
| A &get_a1() { return a1; } |
| A &get_a2() { return a2; } |
| |
| A a1{1}; |
| A a2{2}; |
| }; |
| |
| void init_ex9(py::module &m) { |
| py::module m_sub = m.def_submodule("submodule"); |
| m_sub.def("submodule_func", &submodule_func); |
| |
| py::class_<A>(m_sub, "A") |
| .def(py::init<int>()) |
| .def("__repr__", &A::toString); |
| |
| py::class_<B>(m_sub, "B") |
| .def(py::init<>()) |
| .def("get_a1", &B::get_a1, "Return the internal A 1", py::return_value_policy::reference_internal) |
| .def("get_a2", &B::get_a2, "Return the internal A 2", py::return_value_policy::reference_internal) |
| .def_readwrite("a1", &B::a1) // def_readonly uses an internal reference return policy by default |
| .def_readwrite("a2", &B::a2); |
| |
| m.attr("OD") = py::module::import("collections").attr("OrderedDict"); |
| } |