test_classh_wip.cpp 10.9 KB
Newer Older
1
2
3
4
5
#include "pybind11_tests.h"

#include <pybind11/classh.h>

#include <memory>
6
#include <string>
7
8
9
10

namespace pybind11_tests {
namespace classh_wip {

11
12
13
14
15
struct mpty {
    std::string mtxt;
};

// clang-format off
16

17
18
19
20
21
22
mpty        rtrn_mpty_valu() { mpty obj{"rtrn_valu"}; return obj; }
mpty&&      rtrn_mpty_rref() { mpty obj{"rtrn_rref"}; return std::move(obj); }
mpty const& rtrn_mpty_cref() { static mpty obj; obj.mtxt = "rtrn_cref"; return obj; }
mpty&       rtrn_mpty_mref() { static mpty obj; obj.mtxt = "rtrn_mref"; return obj; }
mpty const* rtrn_mpty_cptr() { static mpty obj; obj.mtxt = "rtrn_cptr"; return &obj; }
mpty*       rtrn_mpty_mptr() { static mpty obj; obj.mtxt = "rtrn_mptr"; return &obj; }
23

24
25
26
27
28
29
std::string pass_mpty_valu(mpty obj)        { return "pass_valu:" + obj.mtxt; }
std::string pass_mpty_rref(mpty&& obj)      { return "pass_rref:" + obj.mtxt; }
std::string pass_mpty_cref(mpty const& obj) { return "pass_cref:" + obj.mtxt; }
std::string pass_mpty_mref(mpty& obj)       { return "pass_mref:" + obj.mtxt; }
std::string pass_mpty_cptr(mpty const* obj) { return "pass_cptr:" + obj->mtxt; }
std::string pass_mpty_mptr(mpty* obj)       { return "pass_mptr:" + obj->mtxt; }
30

31
32
std::shared_ptr<mpty>       rtrn_mpty_shmp() { return std::shared_ptr<mpty      >(new mpty{"rtrn_shmp"}); }
std::shared_ptr<mpty const> rtrn_mpty_shcp() { return std::shared_ptr<mpty const>(new mpty{"rtrn_shcp"}); }
33

34
std::string pass_mpty_shmp(std::shared_ptr<mpty>       obj) { return "pass_shmp:" + obj->mtxt; }
35
std::string pass_mpty_shcp(std::shared_ptr<mpty const> obj) { return "pass_shcp:" + obj->mtxt; }
36

37
38
std::unique_ptr<mpty>       rtrn_mpty_uqmp() { return std::unique_ptr<mpty      >(new mpty{"rtrn_uqmp"}); }
std::unique_ptr<mpty const> rtrn_mpty_uqcp() { return std::unique_ptr<mpty const>(new mpty{"rtrn_uqmp"}); }
39

40
std::string pass_mpty_uqmp(std::unique_ptr<mpty      > obj) { return "pass_uqmp:" + obj->mtxt; }
41
std::string pass_mpty_uqcp(std::unique_ptr<mpty const> obj) { return "pass_uqcp:" + obj->mtxt; }
42

43
44
// clang-format on

45
46
std::string get_mtxt(mpty const &obj) { return obj.mtxt; }

47
48
} // namespace classh_wip
} // namespace pybind11_tests
49
50
51
52
53
54

namespace pybind11 {
namespace detail {

using namespace pybind11_tests::classh_wip;

55
56
57
template <typename T>
struct smart_holder_type_caster_load {
    bool load(handle src, bool /*convert*/) {
58
59
60
61
        if (!isinstance<T>(src))
            return false;
        auto inst  = reinterpret_cast<instance *>(src.ptr());
        auto v_h   = inst->get_value_and_holder(get_type_info(typeid(T)));
62
63
64
65
        smhldr_ptr = &v_h.holder<pybindit::memory::smart_holder>();
        return true;
    }

66
67
protected:
    pybindit::memory::smart_holder *smhldr_ptr = nullptr;
68
69
};

70
template <>
71
struct type_caster<mpty> : smart_holder_type_caster_load<mpty> {
72
73
74
75
76
    static constexpr auto name = _<mpty>();

    // static handle cast(mpty, ...)
    // is redundant (leads to ambiguous overloads).

77
    static handle cast(mpty && /*src*/, return_value_policy /*policy*/, handle /*parent*/) {
78
79
80
        return str("cast_rref").release();
    }

81
    static handle cast(mpty const & /*src*/, return_value_policy /*policy*/, handle /*parent*/) {
82
83
84
        return str("cast_cref").release();
    }

85
    static handle cast(mpty & /*src*/, return_value_policy /*policy*/, handle /*parent*/) {
86
87
88
        return str("cast_mref").release();
    }

89
90
91
92
93
94
95
96
97
    static handle cast(mpty const *src, return_value_policy policy, handle parent) {
        // type_caster_base BEGIN
        // clang-format off
        auto st = src_and_type(src);
        return type_caster_generic::cast(
            st.first, policy, parent, st.second,
            make_copy_constructor(src), make_move_constructor(src));
        // clang-format on
        // type_caster_base END
98
99
    }

100
    static handle cast(mpty * /*src*/, return_value_policy /*policy*/, handle /*parent*/) {
101
102
103
104
105
        return str("cast_mptr").release();
    }

    template <typename T_>
    using cast_op_type = conditional_t<
106
107
        std::is_same<remove_reference_t<T_>, mpty const *>::value,
        mpty const *,
108
        conditional_t<
109
110
            std::is_same<remove_reference_t<T_>, mpty *>::value,
            mpty *,
111
            conditional_t<
112
113
114
115
116
117
118
                std::is_same<T_, mpty const &>::value,
                mpty const &,
                conditional_t<std::is_same<T_, mpty &>::value,
                              mpty &,
                              conditional_t<std::is_same<T_, mpty &&>::value, mpty &&, mpty>>>>>;

    // clang-format off
119

120
121
122
123
124
125
    operator mpty()        { return smhldr_ptr->lvalue_ref<mpty>(); }
    operator mpty&&() &&   { return smhldr_ptr->rvalue_ref<mpty>(); }
    operator mpty const&() { return smhldr_ptr->lvalue_ref<mpty>(); }
    operator mpty&()       { return smhldr_ptr->lvalue_ref<mpty>(); }
    operator mpty const*() { return smhldr_ptr->as_raw_ptr_unowned<mpty>(); }
    operator mpty*()       { return smhldr_ptr->as_raw_ptr_unowned<mpty>(); }
126
127

    // clang-format on
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180

    using itype = mpty;

    // type_caster_base BEGIN
    // clang-format off

    // Returns a (pointer, type_info) pair taking care of necessary type lookup for a
    // polymorphic type (using RTTI by default, but can be overridden by specializing
    // polymorphic_type_hook). If the instance isn't derived, returns the base version.
    static std::pair<const void *, const type_info *> src_and_type(const itype *src) {
        auto &cast_type = typeid(itype);
        const std::type_info *instance_type = nullptr;
        const void *vsrc = polymorphic_type_hook<itype>::get(src, instance_type);
        if (instance_type && !same_type(cast_type, *instance_type)) {
            // This is a base pointer to a derived type. If the derived type is registered
            // with pybind11, we want to make the full derived object available.
            // In the typical case where itype is polymorphic, we get the correct
            // derived pointer (which may be != base pointer) by a dynamic_cast to
            // most derived type. If itype is not polymorphic, we won't get here
            // except via a user-provided specialization of polymorphic_type_hook,
            // and the user has promised that no this-pointer adjustment is
            // required in that case, so it's OK to use static_cast.
            if (const auto *tpi = get_type_info(*instance_type))
                return {vsrc, tpi};
        }
        // Otherwise we have either a nullptr, an `itype` pointer, or an unknown derived pointer, so
        // don't do a cast
        return type_caster_generic::src_and_type(src, cast_type, instance_type);
    }

    using Constructor = void *(*)(const void *);

    /* Only enabled when the types are {copy,move}-constructible *and* when the type
       does not have a private operator new implementation. */
    template <typename T, typename = enable_if_t<is_copy_constructible<T>::value>>
    static auto make_copy_constructor(const T *x) -> decltype(new T(*x), Constructor{}) {
        return [](const void *arg) -> void * {
            return new T(*reinterpret_cast<const T *>(arg));
        };
    }

    template <typename T, typename = enable_if_t<std::is_move_constructible<T>::value>>
    static auto make_move_constructor(const T *x) -> decltype(new T(std::move(*const_cast<T *>(x))), Constructor{}) {
        return [](const void *arg) -> void * {
            return new T(std::move(*const_cast<T *>(reinterpret_cast<const T *>(arg))));
        };
    }

    static Constructor make_copy_constructor(...) { return nullptr; }
    static Constructor make_move_constructor(...) { return nullptr; }

    // clang-format on
    // type_caster_base END
181
182
183
};

template <>
184
struct type_caster<std::shared_ptr<mpty>> : smart_holder_type_caster_load<mpty> {
185
186
    static constexpr auto name = _<std::shared_ptr<mpty>>();

187
    static handle cast(const std::shared_ptr<mpty> & /*src*/,
188
189
190
191
192
                       return_value_policy /*policy*/,
                       handle /*parent*/) {
        return str("cast_shmp").release();
    }

193
194
    template <typename>
    using cast_op_type = std::shared_ptr<mpty>;
195

196
    operator std::shared_ptr<mpty>() { return smhldr_ptr->as_shared_ptr<mpty>(); }
197
198
199
};

template <>
200
struct type_caster<std::shared_ptr<mpty const>> : smart_holder_type_caster_load<mpty> {
201
202
    static constexpr auto name = _<std::shared_ptr<mpty const>>();

203
    static handle cast(const std::shared_ptr<mpty const> & /*src*/,
204
205
206
207
208
                       return_value_policy /*policy*/,
                       handle /*parent*/) {
        return str("cast_shcp").release();
    }

209
210
    template <typename>
    using cast_op_type = std::shared_ptr<mpty const>;
211

212
    operator std::shared_ptr<mpty const>() { return smhldr_ptr->as_shared_ptr<mpty>(); }
213
214
215
};

template <>
216
struct type_caster<std::unique_ptr<mpty>> : smart_holder_type_caster_load<mpty> {
217
218
    static constexpr auto name = _<std::unique_ptr<mpty>>();

219
220
    static handle
    cast(std::unique_ptr<mpty> && /*src*/, return_value_policy /*policy*/, handle /*parent*/) {
221
222
223
        return str("cast_uqmp").release();
    }

224
225
    template <typename>
    using cast_op_type = std::unique_ptr<mpty>;
226

227
    operator std::unique_ptr<mpty>() { return smhldr_ptr->as_unique_ptr<mpty>(); }
228
229
230
};

template <>
231
struct type_caster<std::unique_ptr<mpty const>> : smart_holder_type_caster_load<mpty> {
232
233
    static constexpr auto name = _<std::unique_ptr<mpty const>>();

234
    static handle cast(std::unique_ptr<mpty const> && /*src*/,
235
236
237
238
239
                       return_value_policy /*policy*/,
                       handle /*parent*/) {
        return str("cast_uqcp").release();
    }

240
241
    template <typename>
    using cast_op_type = std::unique_ptr<mpty const>;
242

243
    operator std::unique_ptr<mpty const>() { return smhldr_ptr->as_unique_ptr<mpty>(); }
244
245
};

246
247
} // namespace detail
} // namespace pybind11
248
249
250
251
252
253
254

namespace pybind11_tests {
namespace classh_wip {

TEST_SUBMODULE(classh_wip, m) {
    namespace py = pybind11;

255
256
257
258
259
    py::classh<mpty>(m, "mpty").def(py::init<>()).def(py::init([](const std::string &mtxt) {
        mpty obj;
        obj.mtxt = mtxt;
        return obj;
    }));
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285

    m.def("rtrn_mpty_valu", rtrn_mpty_valu);
    m.def("rtrn_mpty_rref", rtrn_mpty_rref);
    m.def("rtrn_mpty_cref", rtrn_mpty_cref);
    m.def("rtrn_mpty_mref", rtrn_mpty_mref);
    m.def("rtrn_mpty_cptr", rtrn_mpty_cptr);
    m.def("rtrn_mpty_mptr", rtrn_mpty_mptr);

    m.def("pass_mpty_valu", pass_mpty_valu);
    m.def("pass_mpty_rref", pass_mpty_rref);
    m.def("pass_mpty_cref", pass_mpty_cref);
    m.def("pass_mpty_mref", pass_mpty_mref);
    m.def("pass_mpty_cptr", pass_mpty_cptr);
    m.def("pass_mpty_mptr", pass_mpty_mptr);

    m.def("rtrn_mpty_shmp", rtrn_mpty_shmp);
    m.def("rtrn_mpty_shcp", rtrn_mpty_shcp);

    m.def("pass_mpty_shmp", pass_mpty_shmp);
    m.def("pass_mpty_shcp", pass_mpty_shcp);

    m.def("rtrn_mpty_uqmp", rtrn_mpty_uqmp);
    m.def("rtrn_mpty_uqcp", rtrn_mpty_uqcp);

    m.def("pass_mpty_uqmp", pass_mpty_uqmp);
    m.def("pass_mpty_uqcp", pass_mpty_uqcp);
286
287

    m.def("get_mtxt", get_mtxt); // Requires pass_mpty_cref to work properly.
288
289
}

290
291
} // namespace classh_wip
} // namespace pybind11_tests