classh.h: renaming of class_ to classh + namespace; forking test_classh_wip from…

classh.h: renaming of class_ to classh + namespace; forking test_classh_wip from test_type_caster_bare_interface_demo.

tests/test_classh_wip.cpp

+#include "pybind11_tests.h"
+
+#include <pybind11/classh.h>
+
+#include <memory>
+
+namespace pybind11_tests {
+namespace classh_wip {
+
+struct mpty {};
+
+mpty        rtrn_mpty_valu() { mpty obj; return obj; }
+mpty&&      rtrn_mpty_rref() { mpty obj; return std::move(obj); }
+mpty const& rtrn_mpty_cref() { static mpty obj; return obj; }
+mpty&       rtrn_mpty_mref() { static mpty obj; return obj; }
+mpty const* rtrn_mpty_cptr() { static mpty obj; return &obj; }
+mpty*       rtrn_mpty_mptr() { static mpty obj; return &obj; }
+
+const char* pass_mpty_valu(mpty)        { return "load_valu"; }
+const char* pass_mpty_rref(mpty&&)      { return "load_rref"; }
+const char* pass_mpty_cref(mpty const&) { return "load_cref"; }
+const char* pass_mpty_mref(mpty&)       { return "load_mref"; }
+const char* pass_mpty_cptr(mpty const*) { return "load_cptr"; }
+const char* pass_mpty_mptr(mpty*)       { return "load_mptr"; }
+
+std::shared_ptr<mpty>       rtrn_mpty_shmp() { return std::shared_ptr<mpty>(new mpty); }
+std::shared_ptr<mpty const> rtrn_mpty_shcp() { return std::shared_ptr<mpty const>(new mpty); }
+
+const char* pass_mpty_shmp(std::shared_ptr<mpty>)       { return "load_shmp"; }
+const char* pass_mpty_shcp(std::shared_ptr<mpty const>) { return "load_shcp"; }
+
+std::unique_ptr<mpty>       rtrn_mpty_uqmp() { return std::unique_ptr<mpty>(new mpty); }
+std::unique_ptr<mpty const> rtrn_mpty_uqcp() { return std::unique_ptr<mpty const>(new mpty); }
+
+const char* pass_mpty_uqmp(std::unique_ptr<mpty>)       { return "load_uqmp"; }
+const char* pass_mpty_uqcp(std::unique_ptr<mpty const>) { return "load_uqcp"; }
+
+}  // namespace classh_wip
+}  // namespace pybind11_tests
+
+namespace pybind11 {
+namespace detail {
+
+using namespace pybind11_tests::classh_wip;
+
+template <>
+struct type_caster<mpty> {
+    static constexpr auto name = _<mpty>();
+
+    // static handle cast(mpty, ...)
+    // is redundant (leads to ambiguous overloads).
+
+    static handle cast(mpty&& /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_rref").release();
+    }
+
+    static handle cast(mpty const& /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_cref").release();
+    }
+
+    static handle cast(mpty& /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_mref").release();
+    }
+
+    static handle cast(mpty const* /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_cptr").release();
+    }
+
+    static handle cast(mpty* /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_mptr").release();
+    }
+
+    template <typename T_>
+    using cast_op_type = conditional_t<
+        std::is_same<remove_reference_t<T_>, mpty const*>::value, mpty const*,
+        conditional_t<
+            std::is_same<remove_reference_t<T_>, mpty*>::value, mpty*,
+            conditional_t<
+                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>>>>>;
+
+    operator mpty()        { return rtrn_mpty_valu(); }
+    operator mpty&&() &&   { return rtrn_mpty_rref(); }
+    operator mpty const&() { return rtrn_mpty_cref(); }
+    operator mpty&()       { return rtrn_mpty_mref(); }
+    operator mpty const*() { return rtrn_mpty_cptr(); }
+    operator mpty*()       { return rtrn_mpty_mptr(); }
+
+    bool load(handle /*src*/, bool /*convert*/) {
+        return true;
+    }
+};
+
+template <>
+struct type_caster<std::shared_ptr<mpty>> {
+    static constexpr auto name = _<std::shared_ptr<mpty>>();
+
+    static handle cast(const std::shared_ptr<mpty>& /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_shmp").release();
+    }
+
+    template <typename> using cast_op_type = std::shared_ptr<mpty>;
+
+    operator std::shared_ptr<mpty>() { return rtrn_mpty_shmp(); }
+
+    bool load(handle /*src*/, bool /*convert*/) {
+        return true;
+    }
+};
+
+template <>
+struct type_caster<std::shared_ptr<mpty const>> {
+    static constexpr auto name = _<std::shared_ptr<mpty const>>();
+
+    static handle cast(const std::shared_ptr<mpty const>& /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_shcp").release();
+    }
+
+    template <typename> using cast_op_type = std::shared_ptr<mpty const>;
+
+    operator std::shared_ptr<mpty const>() { return rtrn_mpty_shcp(); }
+
+    bool load(handle /*src*/, bool /*convert*/) {
+        return true;
+    }
+};
+
+template <>
+struct type_caster<std::unique_ptr<mpty>> {
+    static constexpr auto name = _<std::unique_ptr<mpty>>();
+
+    static handle cast(std::unique_ptr<mpty>&& /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_uqmp").release();
+    }
+
+    template <typename> using cast_op_type = std::unique_ptr<mpty>;
+
+    operator std::unique_ptr<mpty>() { return rtrn_mpty_uqmp(); }
+
+    bool load(handle /*src*/, bool /*convert*/) {
+        return true;
+    }
+};
+
+template <>
+struct type_caster<std::unique_ptr<mpty const>> {
+    static constexpr auto name = _<std::unique_ptr<mpty const>>();
+
+    static handle cast(std::unique_ptr<mpty const>&& /*src*/,
+                       return_value_policy /*policy*/,
+                       handle /*parent*/) {
+        return str("cast_uqcp").release();
+    }
+
+    template <typename> using cast_op_type = std::unique_ptr<mpty const>;
+
+    operator std::unique_ptr<mpty const>() { return rtrn_mpty_uqcp(); }
+
+    bool load(handle /*src*/, bool /*convert*/) {
+        return true;
+    }
+};
+
+}  // namespace detail
+}  // namespace pybind11
+
+namespace pybind11_tests {
+namespace classh_wip {
+
+TEST_SUBMODULE(classh_wip, m) {
+    namespace py = pybind11;
+
+    py::classh<mpty>(m, "mpty")
+        .def(py::init<>())
+    ;
+
+    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);
+}
+
+}  // namespace classh_wip
+}  // namespace pybind11_tests

tests/test_classh_wip.py

+# -*- coding: utf-8 -*-
+import pytest
+
+from pybind11_tests import classh_wip as m
+
+
+def test_mpty():
+    e = m.mpty()
+    assert e.__class__.__name__ == "mpty"
+
+
+def test_cast():
+    assert m.rtrn_mpty_valu() == "cast_rref"
+    assert m.rtrn_mpty_rref() == "cast_rref"
+    assert m.rtrn_mpty_cref() == "cast_cref"
+    assert m.rtrn_mpty_mref() == "cast_mref"
+    assert m.rtrn_mpty_cptr() == "cast_cptr"
+    assert m.rtrn_mpty_mptr() == "cast_mptr"
+
+
+def test_load():
+    assert m.pass_mpty_valu(None) == "load_valu"
+    assert m.pass_mpty_rref(None) == "load_rref"
+    assert m.pass_mpty_cref(None) == "load_cref"
+    assert m.pass_mpty_mref(None) == "load_mref"
+    assert m.pass_mpty_cptr(None) == "load_cptr"
+    assert m.pass_mpty_mptr(None) == "load_mptr"
+
+
+def test_cast_shared_ptr():
+    assert m.rtrn_mpty_shmp() == "cast_shmp"
+    assert m.rtrn_mpty_shcp() == "cast_shcp"
+
+
+def test_load_shared_ptr():
+    assert m.pass_mpty_shmp(None) == "load_shmp"
+    assert m.pass_mpty_shcp(None) == "load_shcp"
+
+
+def test_cast_unique_ptr():
+    assert m.rtrn_mpty_uqmp() == "cast_uqmp"
+    assert m.rtrn_mpty_uqcp() == "cast_uqcp"
+
+
+def test_load_unique_ptr():
+    assert m.pass_mpty_uqmp(None) == "load_uqmp"
+    assert m.pass_mpty_uqcp(None) == "load_uqcp"