test_stl_binders.cpp revision 12391 
1/*
2    tests/test_stl_binders.cpp -- Usage of stl_binders functions
3
4    Copyright (c) 2016 Sergey Lyskov
5
6    All rights reserved. Use of this source code is governed by a
7    BSD-style license that can be found in the LICENSE file.
8*/
9
10#include "pybind11_tests.h"
11
12#include <pybind11/stl_bind.h>
13#include <pybind11/numpy.h>
14#include <map>
15#include <deque>
16#include <unordered_map>
17
18class El {
19public:
20    El() = delete;
21    El(int v) : a(v) { }
22
23    int a;
24};
25
26std::ostream & operator<<(std::ostream &s, El const&v) {
27    s << "El{" << v.a << '}';
28    return s;
29}
30
31/// Issue #487: binding std::vector<E> with E non-copyable
32class E_nc {
33public:
34    explicit E_nc(int i) : value{i} {}
35    E_nc(const E_nc &) = delete;
36    E_nc &operator=(const E_nc &) = delete;
37    E_nc(E_nc &&) = default;
38    E_nc &operator=(E_nc &&) = default;
39
40    int value;
41};
42
43template <class Container> Container *one_to_n(int n) {
44    auto v = new Container();
45    for (int i = 1; i <= n; i++)
46        v->emplace_back(i);
47    return v;
48}
49
50template <class Map> Map *times_ten(int n) {
51    auto m = new Map();
52    for (int i = 1; i <= n; i++)
53        m->emplace(int(i), E_nc(10*i));
54    return m;
55}
56
57TEST_SUBMODULE(stl_binders, m) {
58    // test_vector_int
59    py::bind_vector<std::vector<unsigned int>>(m, "VectorInt", py::buffer_protocol());
60
61    // test_vector_custom
62    py::class_<El>(m, "El")
63        .def(py::init<int>());
64    py::bind_vector<std::vector<El>>(m, "VectorEl");
65    py::bind_vector<std::vector<std::vector<El>>>(m, "VectorVectorEl");
66
67    // test_map_string_double
68    py::bind_map<std::map<std::string, double>>(m, "MapStringDouble");
69    py::bind_map<std::unordered_map<std::string, double>>(m, "UnorderedMapStringDouble");
70
71    // test_map_string_double_const
72    py::bind_map<std::map<std::string, double const>>(m, "MapStringDoubleConst");
73    py::bind_map<std::unordered_map<std::string, double const>>(m, "UnorderedMapStringDoubleConst");
74
75    py::class_<E_nc>(m, "ENC")
76        .def(py::init<int>())
77        .def_readwrite("value", &E_nc::value);
78
79    // test_noncopyable_containers
80    py::bind_vector<std::vector<E_nc>>(m, "VectorENC");
81    m.def("get_vnc", &one_to_n<std::vector<E_nc>>, py::return_value_policy::reference);
82    py::bind_vector<std::deque<E_nc>>(m, "DequeENC");
83    m.def("get_dnc", &one_to_n<std::deque<E_nc>>, py::return_value_policy::reference);
84    py::bind_map<std::map<int, E_nc>>(m, "MapENC");
85    m.def("get_mnc", &times_ten<std::map<int, E_nc>>, py::return_value_policy::reference);
86    py::bind_map<std::unordered_map<int, E_nc>>(m, "UmapENC");
87    m.def("get_umnc", &times_ten<std::unordered_map<int, E_nc>>, py::return_value_policy::reference);
88
89    // test_vector_buffer
90    py::bind_vector<std::vector<unsigned char>>(m, "VectorUChar", py::buffer_protocol());
91    // no dtype declared for this version:
92    struct VUndeclStruct { bool w; uint32_t x; double y; bool z; };
93    m.def("create_undeclstruct", [m] () mutable {
94        py::bind_vector<std::vector<VUndeclStruct>>(m, "VectorUndeclStruct", py::buffer_protocol());
95    });
96
97    // The rest depends on numpy:
98    try { py::module::import("numpy"); }
99    catch (...) { return; }
100
101    // test_vector_buffer_numpy
102    struct VStruct { bool w; uint32_t x; double y; bool z; };
103    PYBIND11_NUMPY_DTYPE(VStruct, w, x, y, z);
104    py::class_<VStruct>(m, "VStruct").def_readwrite("x", &VStruct::x);
105    py::bind_vector<std::vector<VStruct>>(m, "VectorStruct", py::buffer_protocol());
106    m.def("get_vectorstruct", [] {return std::vector<VStruct> {{0, 5, 3.0, 1}, {1, 30, -1e4, 0}};});
107}
108