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
18 class El {
19 public:
20 El() = delete;
El(int v)21 El(int v) : a(v) { }
22
23 int a;
24 };
25
operator <<(std::ostream & s,El const & v)26 std::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
32 class E_nc {
33 public:
E_nc(int i)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
one_to_n(int n)43 template <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
times_ten(int n)50 template <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
TEST_SUBMODULE(stl_binders,m)57 TEST_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", ×_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", ×_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