pybind11/tests/test_copy_move.cpp

61 class CopyOnlyInt {
63     CopyOnlyInt() { print_default_created(this); }
64     CopyOnlyInt(int v) : value{std::move(v)} { print_created(this, value); }
65     CopyOnlyInt(const CopyOnlyInt &c) { print_copy_created(this, c.value); value = c.value; }
66     CopyOnlyInt &operator=(const CopyOnlyInt &c) { print_copy_assigned(this, c.value); value = c.value; return *this; }
67     ~CopyOnlyInt() { print_destroyed(this); }
85 template <> struct type_caster<CopyOnlyInt> {
87     CopyOnlyInt value;
89     static constexpr auto name = _("CopyOnlyInt");
90     bool load(handle src, bool) { value = CopyOnlyInt(src.cast<int>()); return true; }
91     static handle cast(const CopyOnlyInt &m, return_value_policy r, handle p) { return pybind11::cast(m.value, r, p); }
92     static handle cast(const CopyOnlyInt *src, return_value_policy policy, handle parent) {
96     operator CopyOnlyInt*() { return &value; }
97     operator CopyOnlyInt&() { return value; }
118         r += py::cast<CopyOnlyInt>(o).value; /* copies */
121         CopyOnlyInt m3(py::cast<CopyOnlyInt>(o)); /* copies */
130     m.def("copy_only", [](CopyOnlyInt m) { return m.value; });
137     m.def("copy_tuple", [](std::tuple<CopyOnlyInt, CopyOnlyInt> t) {
140     m.def("move_copy_nested", [](std::pair<MoveOnlyInt, std::pair<std::tuple<MoveOrCopyInt, CopyOnlyInt, std::tuple<MoveOnlyInt>>, MoveOrCopyInt>> x) {
151         auto &co = ConstructorStats::get<CopyOnlyInt>();
156         d["CopyOnlyInt"] = py::cast(co, py::return_value_policy::reference);
168     m.def("copy_optional", [](std::optional<CopyOnlyInt> o) {
171     m.def("move_optional_tuple", [](std::optional<std::tuple<MoveOrCopyInt, MoveOnlyInt, CopyOnlyInt>> x) {