Jason Rhinelander | ec62d97 | 2016-09-09 02:42:51 -0400 | [diff] [blame] | 1 | /* |
| 2 | tests/test_alias_initialization.cpp -- test cases and example of different trampoline |
| 3 | initialization modes |
| 4 | |
| 5 | Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>, Jason Rhinelander <jason@imaginary.ca> |
| 6 | |
| 7 | All rights reserved. Use of this source code is governed by a |
| 8 | BSD-style license that can be found in the LICENSE file. |
| 9 | */ |
| 10 | |
| 11 | #include "pybind11_tests.h" |
| 12 | |
| 13 | test_initializer alias_initialization([](py::module &m) { |
| 14 | // don't invoke Python dispatch classes by default when instantiating C++ classes that were not |
| 15 | // extended on the Python side |
| 16 | struct A { |
| 17 | virtual ~A() {} |
| 18 | virtual void f() { py::print("A.f()"); } |
| 19 | }; |
| 20 | |
| 21 | struct PyA : A { |
| 22 | PyA() { py::print("PyA.PyA()"); } |
| 23 | ~PyA() { py::print("PyA.~PyA()"); } |
| 24 | |
| 25 | void f() override { |
| 26 | py::print("PyA.f()"); |
| 27 | PYBIND11_OVERLOAD(void, A, f); |
| 28 | } |
| 29 | }; |
| 30 | |
| 31 | auto call_f = [](A *a) { a->f(); }; |
| 32 | |
| 33 | py::class_<A, PyA>(m, "A") |
| 34 | .def(py::init<>()) |
| 35 | .def("f", &A::f); |
| 36 | |
| 37 | m.def("call_f", call_f); |
| 38 | |
| 39 | |
| 40 | // ... unless we explicitly request it, as in this example: |
| 41 | struct A2 { |
| 42 | virtual ~A2() {} |
| 43 | virtual void f() { py::print("A2.f()"); } |
| 44 | }; |
| 45 | |
| 46 | struct PyA2 : A2 { |
| 47 | PyA2() { py::print("PyA2.PyA2()"); } |
| 48 | ~PyA2() { py::print("PyA2.~PyA2()"); } |
| 49 | void f() override { |
| 50 | py::print("PyA2.f()"); |
| 51 | PYBIND11_OVERLOAD(void, A2, f); |
| 52 | } |
| 53 | }; |
| 54 | |
| 55 | py::class_<A2, PyA2>(m, "A2") |
| 56 | .def(py::init_alias<>()) |
| 57 | .def("f", &A2::f); |
| 58 | |
| 59 | m.def("call_f", [](A2 *a2) { a2->f(); }); |
| 60 | |
| 61 | }); |
| 62 | |