test_multiple_inheritance.cpp revision 11986:c12e4625ab56 
1/*
2    tests/test_multiple_inheritance.cpp -- multiple inheritance,
3    implicit MI casts
4
5    Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
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
14struct Base1 {
15    Base1(int i) : i(i) { }
16    int foo() { return i; }
17    int i;
18};
19
20struct Base2 {
21    Base2(int i) : i(i) { }
22    int bar() { return i; }
23    int i;
24};
25
26struct Base12 : Base1, Base2 {
27    Base12(int i, int j) : Base1(i), Base2(j) { }
28};
29
30struct MIType : Base12 {
31    MIType(int i, int j) : Base12(i, j) { }
32};
33
34test_initializer multiple_inheritance([](py::module &m) {
35    py::class_<Base1>(m, "Base1")
36        .def(py::init<int>())
37        .def("foo", &Base1::foo);
38
39    py::class_<Base2>(m, "Base2")
40        .def(py::init<int>())
41        .def("bar", &Base2::bar);
42
43    py::class_<Base12, Base1, Base2>(m, "Base12");
44
45    py::class_<MIType, Base12>(m, "MIType")
46        .def(py::init<int, int>());
47});
48
49/* Test the case where not all base classes are specified,
50   and where pybind11 requires the py::multiple_inheritance
51   flag to perform proper casting between types */
52
53struct Base1a {
54    Base1a(int i) : i(i) { }
55    int foo() { return i; }
56    int i;
57};
58
59struct Base2a {
60    Base2a(int i) : i(i) { }
61    int bar() { return i; }
62    int i;
63};
64
65struct Base12a : Base1a, Base2a {
66    Base12a(int i, int j) : Base1a(i), Base2a(j) { }
67};
68
69test_initializer multiple_inheritance_nonexplicit([](py::module &m) {
70    py::class_<Base1a, std::shared_ptr<Base1a>>(m, "Base1a")
71        .def(py::init<int>())
72        .def("foo", &Base1a::foo);
73
74    py::class_<Base2a, std::shared_ptr<Base2a>>(m, "Base2a")
75        .def(py::init<int>())
76        .def("bar", &Base2a::bar);
77
78    py::class_<Base12a, /* Base1 missing */ Base2a,
79               std::shared_ptr<Base12a>>(m, "Base12a", py::multiple_inheritance())
80        .def(py::init<int, int>());
81
82    m.def("bar_base2a", [](Base2a *b) { return b->bar(); });
83    m.def("bar_base2a_sharedptr", [](std::shared_ptr<Base2a> b) { return b->bar(); });
84});
85