Merge fd486c8afb into eba3d617ee

Example error message (🐍 3.11 • ubuntu-latest • x64, GNU 13.3.0):

```
include/pybind11/detail/value_and_holder.h:56:52: error: ‘uint8_t’ is not a member of ‘std’; did you mean ‘wint_t’?
   56 |             inst->nonsimple.status[index] &= (std::uint8_t) ~instance::status_holder_constructed;
      |                                                    ^~~~~~~
```

include/pybind11/cast.h

@@ -836,8 +836,6 @@ protected:
     holder_type holder;
 };
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 template <typename, typename SFINAE = void>
 struct copyable_holder_caster_shared_ptr_with_smart_holder_support_enabled : std::true_type {};
 
@@ -928,13 +926,13 @@ protected:
             return;
         }
         throw cast_error("Unable to cast from non-held to held instance (T& to Holder<T>) "
-#    if !defined(PYBIND11_DETAILED_ERROR_MESSAGES)
+#if !defined(PYBIND11_DETAILED_ERROR_MESSAGES)
                          "(#define PYBIND11_DETAILED_ERROR_MESSAGES or compile in debug mode for "
                          "type information)");
-#    else
+#else
                          "of type '"
                          + type_id<std::shared_ptr<type>>() + "''");
-#    endif
+#endif
     }
 
     template <typename T = std::shared_ptr<type>,
@@ -968,8 +966,6 @@ protected:
     std::shared_ptr<type> shared_ptr_storage;
 };
 
-#endif // PYBIND11_SMART_HOLDER_ENABLED
-
 /// Specialize for the common std::shared_ptr, so users don't need to
 template <typename T>
 class type_caster<std::shared_ptr<T>> : public copyable_holder_caster<T, std::shared_ptr<T>> {};
@@ -990,8 +986,6 @@ struct move_only_holder_caster {
     static constexpr auto name = type_caster_base<type>::name;
 };
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 template <typename, typename SFINAE = void>
 struct move_only_holder_caster_unique_ptr_with_smart_holder_support_enabled : std::true_type {};
 
@@ -1129,8 +1123,6 @@ public:
     std::shared_ptr<std::unique_ptr<type, deleter>> unique_ptr_storage;
 };
 
-#endif // PYBIND11_SMART_HOLDER_ENABLED
-
 template <typename type, typename deleter>
 class type_caster<std::unique_ptr<type, deleter>>
     : public move_only_holder_caster<type, std::unique_ptr<type, deleter>> {};
@@ -1169,10 +1161,8 @@ struct is_holder_type
 template <typename base, typename deleter>
 struct is_holder_type<base, std::unique_ptr<base, deleter>> : std::true_type {};
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 template <typename base>
 struct is_holder_type<base, smart_holder> : std::true_type {};
-#endif
 
 #ifdef PYBIND11_DISABLE_HANDLE_TYPE_NAME_DEFAULT_IMPLEMENTATION // See PR #4888
 

include/pybind11/detail/common.h

@@ -22,8 +22,6 @@
 // Additional convention: 0xD = dev
 #define PYBIND11_VERSION_HEX 0x030000D1
 
-#define PYBIND11_SMART_HOLDER_ENABLED // TODO(rwgk): purge
-
 // Define some generic pybind11 helper macros for warning management.
 //
 // Note that compiler-specific push/pop pairs are baked into the

include/pybind11/detail/init.h

@@ -198,8 +198,6 @@ void construct(value_and_holder &v_h, Alias<Class> &&result, bool) {
     v_h.value_ptr() = new Alias<Class>(std::move(result));
 }
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 template <typename T, typename D>
 smart_holder init_smart_holder_from_unique_ptr(std::unique_ptr<T, D> &&unq_ptr,
                                                bool void_cast_raw_ptr) {
@@ -268,8 +266,6 @@ void construct(value_and_holder &v_h,
     v_h.type->init_instance(v_h.inst, &smhldr);
 }
 
-#endif // PYBIND11_SMART_HOLDER_ENABLED
-
 // Implementing class for py::init<...>()
 template <typename... Args>
 struct constructor {

include/pybind11/detail/type_caster_base.h

@@ -511,8 +511,6 @@ inline PyThreadState *get_thread_state_unchecked() {
 void keep_alive_impl(handle nurse, handle patient);
 inline PyObject *make_new_instance(PyTypeObject *type);
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 // PYBIND11:REMINDER: Needs refactoring of existing pybind11 code.
 inline bool deregister_instance(instance *self, void *valptr, const type_info *tinfo);
 
@@ -868,8 +866,6 @@ struct load_helper : value_and_holder_helper {
 
 PYBIND11_NAMESPACE_END(smart_holder_type_caster_support)
 
-#endif // PYBIND11_SMART_HOLDER_ENABLED
-
 class type_caster_generic {
 public:
     PYBIND11_NOINLINE explicit type_caster_generic(const std::type_info &type_info)
@@ -974,7 +970,6 @@ public:
 
     // Base methods for generic caster; there are overridden in copyable_holder_caster
     void load_value(value_and_holder &&v_h) {
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
         if (typeinfo->holder_enum_v == detail::holder_enum_t::smart_holder) {
             smart_holder_type_caster_support::value_and_holder_helper v_h_helper;
             v_h_helper.loaded_v_h = v_h;
@@ -984,7 +979,6 @@ public:
                 return;
             }
         }
-#endif
         auto *&vptr = v_h.value_ptr();
         // Lazy allocation for unallocated values:
         if (vptr == nullptr) {

include/pybind11/detail/using_smart_holder.h

@@ -5,29 +5,18 @@
 #pragma once
 
 #include "common.h"
-#include "internals.h"
+#include "struct_smart_holder.h"
 
 #include <type_traits>
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-#    include "struct_smart_holder.h"
-#endif
-
 PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 using pybindit::memory::smart_holder;
-#endif
 
 PYBIND11_NAMESPACE_BEGIN(detail)
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 template <typename H>
 using is_smart_holder = std::is_same<H, smart_holder>;
-#else
-template <typename>
-struct is_smart_holder : std::false_type {};
-#endif
 
 PYBIND11_NAMESPACE_END(detail)
 PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)

include/pybind11/detail/value_and_holder.h

@@ -7,6 +7,7 @@
 #include "common.h"
 
 #include <cstddef>
+#include <cstdint>
 #include <typeinfo>
 
 PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)

include/pybind11/eigen/matrix.h

@@ -225,19 +225,22 @@ struct EigenProps {
         = !show_c_contiguous && show_order && requires_col_major;
 
     static constexpr auto descriptor
-        = const_name("numpy.ndarray[") + npy_format_descriptor<Scalar>::name + const_name("[")
+        = const_name("typing.Annotated[")
+          + io_name("numpy.typing.ArrayLike, ", "numpy.typing.NDArray[")
+          + npy_format_descriptor<Scalar>::name + io_name("", "]") + const_name(", \"[")
           + const_name<fixed_rows>(const_name<(size_t) rows>(), const_name("m")) + const_name(", ")
-          + const_name<fixed_cols>(const_name<(size_t) cols>(), const_name("n")) + const_name("]")
+          + const_name<fixed_cols>(const_name<(size_t) cols>(), const_name("n"))
-          +
+          + const_name("]\"")
           // For a reference type (e.g. Ref<MatrixXd>) we have other constraints that might need to
           // be satisfied: writeable=True (for a mutable reference), and, depending on the map's
           // stride options, possibly f_contiguous or c_contiguous.  We include them in the
           // descriptor output to provide some hint as to why a TypeError is occurring (otherwise
-          // it can be confusing to see that a function accepts a 'numpy.ndarray[float64[3,2]]' and
+          // it can be confusing to see that a function accepts a
-          // an error message that you *gave* a numpy.ndarray of the right type and dimensions.
+          // 'typing.Annotated[numpy.typing.NDArray[numpy.float64], "[3,2]"]' and an error message
-          const_name<show_writeable>(", flags.writeable", "")
+          // that you *gave* a numpy.ndarray of the right type and dimensions.
-          + const_name<show_c_contiguous>(", flags.c_contiguous", "")
+          + const_name<show_writeable>(", \"flags.writeable\"", "")
-          + const_name<show_f_contiguous>(", flags.f_contiguous", "") + const_name("]");
+          + const_name<show_c_contiguous>(", \"flags.c_contiguous\"", "")
+          + const_name<show_f_contiguous>(", \"flags.f_contiguous\"", "") + const_name("]");
 };
 
 // Casts an Eigen type to numpy array.  If given a base, the numpy array references the src data,
@@ -441,7 +444,9 @@ public:
         }
     }
 
-    static constexpr auto name = props::descriptor;
+    // return_descr forces the use of NDArray instead of ArrayLike in args
+    // since Ref<...> args can only accept arrays.
+    static constexpr auto name = return_descr(props::descriptor);
 
     // Explicitly delete these: support python -> C++ conversion on these (i.e. these can be return
     // types but not bound arguments).  We still provide them (with an explicitly delete) so that

include/pybind11/eigen/tensor.h

@@ -124,13 +124,16 @@ struct eigen_tensor_helper<
 template <typename Type, bool ShowDetails, bool NeedsWriteable = false>
 struct get_tensor_descriptor {
     static constexpr auto details
-        = const_name<NeedsWriteable>(", flags.writeable", "") + const_name
+        = const_name<NeedsWriteable>(", \"flags.writeable\"", "") + const_name
               < static_cast<int>(Type::Layout)
-          == static_cast<int>(Eigen::RowMajor) > (", flags.c_contiguous", ", flags.f_contiguous");
+          == static_cast<int>(Eigen::RowMajor)
+                 > (", \"flags.c_contiguous\"", ", \"flags.f_contiguous\"");
     static constexpr auto value
-        = const_name("numpy.ndarray[") + npy_format_descriptor<typename Type::Scalar>::name
+        = const_name("typing.Annotated[")
-          + const_name("[") + eigen_tensor_helper<remove_cv_t<Type>>::dimensions_descriptor
+          + io_name("numpy.typing.ArrayLike, ", "numpy.typing.NDArray[")
-          + const_name("]") + const_name<ShowDetails>(details, const_name("")) + const_name("]");
+          + npy_format_descriptor<typename Type::Scalar>::name + io_name("", "]")
+          + const_name(", \"[") + eigen_tensor_helper<remove_cv_t<Type>>::dimensions_descriptor
+          + const_name("]\"") + const_name<ShowDetails>(details, const_name("")) + const_name("]");
 };
 
 // When EIGEN_AVOID_STL_ARRAY is defined, Eigen::DSizes<T, 0> does not have the begin() member
@@ -502,7 +505,10 @@ protected:
     std::unique_ptr<MapType> value;
 
 public:
-    static constexpr auto name = get_tensor_descriptor<Type, true, needs_writeable>::value;
+    // return_descr forces the use of NDArray instead of ArrayLike since refs can only reference
+    // arrays
+    static constexpr auto name
+        = return_descr(get_tensor_descriptor<Type, true, needs_writeable>::value);
     explicit operator MapType *() { return value.get(); }
     explicit operator MapType &() { return *value; }
     explicit operator MapType &&() && { return std::move(*value); }

include/pybind11/numpy.h

@@ -175,7 +175,6 @@ inline numpy_internals &get_numpy_internals() {
 PYBIND11_NOINLINE module_ import_numpy_core_submodule(const char *submodule_name) {
     module_ numpy = module_::import("numpy");
     str version_string = numpy.attr("__version__");
-
     module_ numpy_lib = module_::import("numpy.lib");
     object numpy_version = numpy_lib.attr("NumpyVersion")(version_string);
     int major_version = numpy_version.attr("major").cast<int>();
@@ -2183,7 +2182,8 @@ vectorize_helper<Func, Return, Args...> vectorize_extractor(const Func &f, Retur
 template <typename T, int Flags>
 struct handle_type_name<array_t<T, Flags>> {
     static constexpr auto name
-        = const_name("numpy.ndarray[") + npy_format_descriptor<T>::name + const_name("]");
+        = io_name("typing.Annotated[numpy.typing.ArrayLike, ", "numpy.typing.NDArray[")
+          + npy_format_descriptor<T>::name + const_name("]");
 };
 
 PYBIND11_NAMESPACE_END(detail)

include/pybind11/pybind11.h

@@ -1663,8 +1663,6 @@ PYBIND11_NAMESPACE_END(detail)
 template <typename T, typename D, typename SFINAE = void>
 struct property_cpp_function : detail::property_cpp_function_classic<T, D> {};
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 PYBIND11_NAMESPACE_BEGIN(detail)
 
 template <typename T, typename D, typename SFINAE = void>
@@ -1842,9 +1840,7 @@ struct property_cpp_function<
         detail::both_t_and_d_use_type_caster_base<T, typename D::element_type>>::value>>
     : detail::property_cpp_function_sh_unique_ptr_member<T, D> {};
 
-#endif // PYBIND11_SMART_HOLDER_ENABLED
+#if defined(PYBIND11_USE_SMART_HOLDER_AS_DEFAULT)
-
-#if defined(PYBIND11_USE_SMART_HOLDER_AS_DEFAULT) && defined(PYBIND11_SMART_HOLDER_ENABLED)
 // NOTE: THIS IS MEANT FOR STRESS-TESTING ONLY!
 //       As of PR #5257, for production use, there is no longer a strong reason to make
 //       smart_holder the default holder:
@@ -1852,7 +1848,6 @@ struct property_cpp_function<
 //       Running the pybind11 unit tests with smart_holder as the default holder is to ensure
 //       that `py::smart_holder` / `py::classh` is backward-compatible with all pre-existing
 //       functionality.
-#    define PYBIND11_ACTUALLY_USING_SMART_HOLDER_AS_DEFAULT
 template <typename>
 using default_holder_type = smart_holder;
 #else
@@ -1911,7 +1906,6 @@ public:
         // A more fitting name would be uses_unique_ptr_holder.
         record.default_holder = detail::is_instantiation<std::unique_ptr, holder_type>::value;
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
         if (detail::is_instantiation<std::unique_ptr, holder_type>::value) {
             record.holder_enum_v = detail::holder_enum_t::std_unique_ptr;
         } else if (detail::is_instantiation<std::shared_ptr, holder_type>::value) {
@@ -1921,7 +1915,6 @@ public:
         } else {
             record.holder_enum_v = detail::holder_enum_t::custom_holder;
         }
-#endif
 
         set_operator_new<type>(&record);
 
@@ -2263,8 +2256,6 @@ private:
         init_holder(inst, v_h, (const holder_type *) holder_ptr, v_h.value_ptr<type>());
     }
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
     template <typename WrappedType>
     static bool try_initialization_using_shared_from_this(holder_type *, WrappedType *, ...) {
         return false;
@@ -2324,8 +2315,6 @@ private:
         v_h.set_holder_constructed();
     }
 
-#endif // PYBIND11_SMART_HOLDER_ENABLED
-
     // Deallocates an instance; via holder, if constructed; otherwise via operator delete.
     // NOTE: The Python error indicator needs to cleared BEFORE this function is called.
     // This is because we could be deallocating while cleaning up after a Python exception.
@@ -2391,8 +2380,6 @@ private:
     }
 };
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 // Supports easier switching between py::class_<T> and py::class_<T, py::smart_holder>:
 // users can simply replace the `_` in `class_` with `h` or vice versa.
 template <typename type_, typename... options>
@@ -2401,8 +2388,6 @@ public:
     using class_<type_, smart_holder, options...>::class_;
 };
 
-#endif
-
 /// Binds an existing constructor taking arguments Args...
 template <typename... Args>
 detail::initimpl::constructor<Args...> init() {

include/pybind11/trampoline_self_life_support.h

@@ -4,13 +4,9 @@
 
 #pragma once
 
-#include "detail/internals.h"
+#include "detail/common.h"
-
+#include "detail/using_smart_holder.h"
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
+#include "detail/value_and_holder.h"
-
-#    include "detail/common.h"
-#    include "detail/using_smart_holder.h"
-#    include "detail/value_and_holder.h"
 
 PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
 
@@ -62,5 +58,3 @@ struct trampoline_self_life_support {
 };
 
 PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
-
-#endif // PYBIND11_SMART_HOLDER_ENABLED

tests/test_class.cpp

@@ -109,11 +109,7 @@ TEST_SUBMODULE(class_, m) {
     struct ToBeHeldByUniquePtr {};
     py::class_<ToBeHeldByUniquePtr, std::unique_ptr<ToBeHeldByUniquePtr>>(m, "ToBeHeldByUniquePtr")
         .def(py::init<>());
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
     m.def("pass_unique_ptr", [](std::unique_ptr<ToBeHeldByUniquePtr> &&) {});
-#else
-    m.attr("pass_unique_ptr") = py::none();
-#endif
 
     // test_inheritance
     class Pet {
@@ -636,7 +632,7 @@ CHECK_NOALIAS(8);
 CHECK_HOLDER(1, unique);
 CHECK_HOLDER(2, unique);
 CHECK_HOLDER(3, unique);
-#ifndef PYBIND11_ACTUALLY_USING_SMART_HOLDER_AS_DEFAULT
+#ifndef PYBIND11_USE_SMART_HOLDER_AS_DEFAULT
 CHECK_HOLDER(4, unique);
 CHECK_HOLDER(5, unique);
 #endif

tests/test_class.py

@@ -51,8 +51,6 @@ def test_instance_new():
 
 def test_pass_unique_ptr():
     obj = m.ToBeHeldByUniquePtr()
-    if m.pass_unique_ptr is None:
-        pytest.skip("smart_holder not available.")
     with pytest.raises(RuntimeError) as execinfo:
         m.pass_unique_ptr(obj)
     assert str(execinfo.value).startswith(

tests/test_class_sh_basic.cpp

@@ -144,24 +144,7 @@ class LocalUnusualOpRef : UnusualOpRef {}; // To avoid clashing with `py::class_
 py::object CastUnusualOpRefConstRef(const LocalUnusualOpRef &cref) { return py::cast(cref); }
 py::object CastUnusualOpRefMovable(LocalUnusualOpRef &&mvbl) { return py::cast(std::move(mvbl)); }
 
-} // namespace class_sh_basic
-} // namespace pybind11_tests
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_basic::atyp)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_basic::uconsumer)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_basic::SharedPtrStash)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_basic::LocalUnusualOpRef)
-
-namespace pybind11_tests {
-namespace class_sh_basic {
-
 TEST_SUBMODULE(class_sh_basic, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     namespace py = pybind11;
 
     py::classh<atyp>(m, "atyp").def(py::init<>()).def(py::init([](const std::string &mtxt) {
@@ -260,7 +243,6 @@ TEST_SUBMODULE(class_sh_basic, m) {
           []() { return CastUnusualOpRefConstRef(LocalUnusualOpRef()); });
     m.def("CallCastUnusualOpRefMovable",
           []() { return CastUnusualOpRefMovable(LocalUnusualOpRef()); });
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }
 
 } // namespace class_sh_basic

tests/test_class_sh_basic.py

@@ -7,9 +7,6 @@ import pytest
 
 from pybind11_tests import class_sh_basic as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_atyp_constructors():
     obj = m.atyp()

tests/test_class_sh_disowning.cpp

@@ -28,16 +28,7 @@ int overloaded(std::unique_ptr<Atype<2>> at2, int i) { return at2->get() * 40 +
 } // namespace class_sh_disowning
 } // namespace pybind11_tests
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning::Atype<1>)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning::Atype<2>)
-
 TEST_SUBMODULE(class_sh_disowning, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     using namespace pybind11_tests::class_sh_disowning;
 
     py::classh<Atype<1>>(m, "Atype1").def(py::init<int>()).def("get", &Atype<1>::get);
@@ -49,5 +40,4 @@ TEST_SUBMODULE(class_sh_disowning, m) {
 
     m.def("overloaded", (int (*)(std::unique_ptr<Atype<1>>, int)) &overloaded);
     m.def("overloaded", (int (*)(std::unique_ptr<Atype<2>>, int)) &overloaded);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_disowning.py

@@ -4,9 +4,6 @@ import pytest
 
 from pybind11_tests import class_sh_disowning as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def is_disowned(obj):
     try:

tests/test_class_sh_disowning_mi.cpp

@@ -48,21 +48,7 @@ int disown_base2(std::unique_ptr<Base2> b2) { return b2->j * 2000 + 2; }
 } // namespace class_sh_disowning_mi
 } // namespace pybind11_tests
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning_mi::B)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning_mi::C0)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning_mi::C1)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning_mi::D)
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning_mi::Base1)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_disowning_mi::Base2)
-
 TEST_SUBMODULE(class_sh_disowning_mi, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     using namespace pybind11_tests::class_sh_disowning_mi;
 
     py::classh<B>(m, "B")
@@ -98,5 +84,4 @@ TEST_SUBMODULE(class_sh_disowning_mi, m) {
     py::classh<Base2>(m, "Base2").def(py::init<int>()).def("bar", &Base2::bar);
     m.def("disown_base1", disown_base1);
     m.def("disown_base2", disown_base2);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_disowning_mi.py

@@ -5,9 +5,6 @@ import pytest
 import env  # noqa: F401
 from pybind11_tests import class_sh_disowning_mi as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_diamond_inheritance():
     # Very similar to test_multiple_inheritance.py:test_diamond_inheritance.

tests/test_class_sh_factory_constructors.cpp

@@ -72,27 +72,7 @@ struct sddwaa : std::default_delete<with_alias_alias> {};
 } // namespace class_sh_factory_constructors
 } // namespace pybind11_tests
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_valu)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_rref)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_cref)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_mref)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_cptr)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_mptr)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_shmp)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_shcp)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_uqmp)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_uqcp)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_udmp)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::atyp_udcp)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_factory_constructors::with_alias)
-
 TEST_SUBMODULE(class_sh_factory_constructors, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     using namespace pybind11_tests::class_sh_factory_constructors;
 
     py::classh<atyp_valu>(m, "atyp_valu")
@@ -183,5 +163,4 @@ TEST_SUBMODULE(class_sh_factory_constructors, m) {
                       [](int, int, int, int, int) {
                           return std::make_shared<with_alias>(); // Invalid alias factory.
                       }));
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_factory_constructors.py

@@ -4,9 +4,6 @@ import pytest
 
 from pybind11_tests import class_sh_factory_constructors as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_atyp_factories():
     assert m.atyp_valu().get_mtxt() == "Valu"

tests/test_class_sh_inheritance.cpp

@@ -59,26 +59,7 @@ inline int pass_cptr_base2(base2 const *b) { return b->id() + 22; }
 inline int pass_cptr_drvd2(drvd2 const *d) { return d->id() + 23; }
 // clang-format on
 
-} // namespace class_sh_inheritance
-} // namespace pybind11_tests
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_inheritance::base)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_inheritance::drvd)
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_inheritance::base1)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_inheritance::base2)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_inheritance::drvd2)
-
-namespace pybind11_tests {
-namespace class_sh_inheritance {
-
 TEST_SUBMODULE(class_sh_inheritance, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     py::classh<base>(m, "base");
     py::classh<drvd, base>(m, "drvd");
 
@@ -105,7 +86,6 @@ TEST_SUBMODULE(class_sh_inheritance, m) {
     m.def("pass_cptr_base1", pass_cptr_base1);
     m.def("pass_cptr_base2", pass_cptr_base2);
     m.def("pass_cptr_drvd2", pass_cptr_drvd2);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }
 
 } // namespace class_sh_inheritance

tests/test_class_sh_inheritance.py

@@ -1,12 +1,7 @@
 from __future__ import annotations
 
-import pytest
-
 from pybind11_tests import class_sh_inheritance as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_rtrn_mptr_drvd_pass_cptr_base():
     d = m.rtrn_mptr_drvd()

tests/test_class_sh_mi_thunks.cpp

@@ -35,17 +35,7 @@ struct Derived : Base1, Base0 {
 
 } // namespace test_class_sh_mi_thunks
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(test_class_sh_mi_thunks::Base0)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(test_class_sh_mi_thunks::Base1)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(test_class_sh_mi_thunks::Derived)
-
 TEST_SUBMODULE(class_sh_mi_thunks, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     using namespace test_class_sh_mi_thunks;
 
     m.def("ptrdiff_drvd_base0", []() {
@@ -103,5 +93,4 @@ TEST_SUBMODULE(class_sh_mi_thunks, m) {
         }
         return obj_der->vec.size();
     });
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_mi_thunks.py

@@ -4,9 +4,6 @@ import pytest
 
 from pybind11_tests import class_sh_mi_thunks as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_ptrdiff_drvd_base0():
     ptrdiff = m.ptrdiff_drvd_base0()

tests/test_class_sh_property.cpp

@@ -46,24 +46,7 @@ struct WithConstCharPtrMember {
 
 } // namespace test_class_sh_property
 
-PYBIND11_TYPE_CASTER_BASE_HOLDER(test_class_sh_property::ClassicField,
-                                 std::unique_ptr<test_class_sh_property::ClassicField>)
-PYBIND11_TYPE_CASTER_BASE_HOLDER(test_class_sh_property::ClassicOuter,
-                                 std::unique_ptr<test_class_sh_property::ClassicOuter>)
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(test_class_sh_property::Field)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(test_class_sh_property::Outer)
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(test_class_sh_property::WithCharArrayMember)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(test_class_sh_property::WithConstCharPtrMember)
-
 TEST_SUBMODULE(class_sh_property, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     using namespace test_class_sh_property;
 
     py::class_<ClassicField, std::unique_ptr<ClassicField>>(m, "ClassicField")
@@ -109,5 +92,4 @@ TEST_SUBMODULE(class_sh_property, m) {
     py::classh<WithConstCharPtrMember>(m, "WithConstCharPtrMember")
         .def(py::init<>())
         .def_readonly("const_char_ptr_member", &WithConstCharPtrMember::const_char_ptr_member);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_property.py

@@ -7,9 +7,6 @@ import pytest
 import env  # noqa: F401
 from pybind11_tests import class_sh_property as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 @pytest.mark.skipif(
     "env.PYPY or env.GRAALPY", reason="gc after `del field` is apparently deferred"

tests/test_class_sh_property_non_owning.cpp

@@ -46,17 +46,7 @@ public:
 
 using namespace test_class_sh_property_non_owning;
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(CoreField)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(DataField)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(DataFieldsHolder)
-
 TEST_SUBMODULE(class_sh_property_non_owning, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     py::classh<CoreField>(m, "CoreField").def_readwrite("int_value", &CoreField::int_value);
 
     py::classh<DataField>(m, "DataField")
@@ -71,5 +61,4 @@ TEST_SUBMODULE(class_sh_property_non_owning, m) {
     py::classh<DataFieldsHolder>(m, "DataFieldsHolder")
         .def(py::init<std::size_t>())
         .def("vec_at", &DataFieldsHolder::vec_at, py::return_value_policy::reference_internal);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_property_non_owning.py

@@ -4,9 +4,6 @@ import pytest
 
 from pybind11_tests import class_sh_property_non_owning as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 @pytest.mark.parametrize("persistent_holder", [True, False])
 @pytest.mark.parametrize(

tests/test_class_sh_shared_ptr_copy_move.cpp

@@ -41,21 +41,8 @@ struct Outer {
 };
 
 } // namespace
-} // namespace pybind11_tests
-
-PYBIND11_TYPE_CASTER_BASE_HOLDER(pybind11_tests::FooShPtr,
-                                 std::shared_ptr<pybind11_tests::FooShPtr>)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::FooSmHld)
-
-namespace pybind11_tests {
 
 TEST_SUBMODULE(class_sh_shared_ptr_copy_move, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     namespace py = pybind11;
 
     py::class_<FooShPtr, std::shared_ptr<FooShPtr>>(m, "FooShPtr")
@@ -63,20 +50,20 @@ TEST_SUBMODULE(class_sh_shared_ptr_copy_move, m) {
     py::classh<FooSmHld>(m, "FooSmHld").def("get_history", &FooSmHld::get_history);
 
     auto outer = py::class_<Outer>(m, "Outer").def(py::init());
-#    define MAKE_PROP(PropTyp)                                                                    \
+#define MAKE_PROP(PropTyp)                                                                        \
     MAKE_PROP_FOO(ShPtr, PropTyp)                                                                 \
     MAKE_PROP_FOO(SmHld, PropTyp)
 
-#    define MAKE_PROP_FOO(FooTyp, PropTyp)                                                        \
+#define MAKE_PROP_FOO(FooTyp, PropTyp)                                                            \
     .def_##PropTyp(#FooTyp "_" #PropTyp "_default", &Outer::FooTyp)                               \
         .def_##PropTyp(                                                                           \
             #FooTyp "_" #PropTyp "_copy", &Outer::FooTyp, py::return_value_policy::copy)          \
         .def_##PropTyp(                                                                           \
             #FooTyp "_" #PropTyp "_move", &Outer::FooTyp, py::return_value_policy::move)
     outer MAKE_PROP(readonly) MAKE_PROP(readwrite);
-#    undef MAKE_PROP_FOO
+#undef MAKE_PROP_FOO
 
-#    define MAKE_PROP_FOO(FooTyp, PropTyp)                                                        \
+#define MAKE_PROP_FOO(FooTyp, PropTyp)                                                            \
     .def_##PropTyp(#FooTyp "_property_" #PropTyp "_default", &Outer::FooTyp)                      \
         .def_property_##PropTyp(#FooTyp "_property_" #PropTyp "_copy",                            \
                                 &Outer::get##FooTyp,                                              \
@@ -85,8 +72,8 @@ TEST_SUBMODULE(class_sh_shared_ptr_copy_move, m) {
                                 &Outer::get##FooTyp,                                              \
                                 py::return_value_policy::move)
     outer MAKE_PROP(readonly);
-#    undef MAKE_PROP_FOO
+#undef MAKE_PROP_FOO
-#    undef MAKE_PROP
+#undef MAKE_PROP
 
     m.def("test_ShPtr_copy", []() {
         auto o = std::make_shared<FooShPtr>("copy");
@@ -113,7 +100,6 @@ TEST_SUBMODULE(class_sh_shared_ptr_copy_move, m) {
         l.append(std::move(o));
         return l;
     });
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }
 
 } // namespace pybind11_tests

tests/test_class_sh_shared_ptr_copy_move.py

@@ -1,12 +1,7 @@
 from __future__ import annotations
 
-import pytest
-
 from pybind11_tests import class_sh_shared_ptr_copy_move as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_shptr_copy():
     txt = m.test_ShPtr_copy()[0].get_history()

tests/test_class_sh_trampoline_basic.cpp

@@ -34,7 +34,6 @@ struct AbaseAlias : Abase<SerNo> {
     }
 };
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 template <>
 struct AbaseAlias<1> : Abase<1>, py::trampoline_self_life_support {
     using Abase<1>::Abase;
@@ -46,7 +45,6 @@ struct AbaseAlias<1> : Abase<1>, py::trampoline_self_life_support {
                                other_val);
     }
 };
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 
 template <int SerNo>
 int AddInCppRawPtr(const Abase<SerNo> *obj, int other_val) {
@@ -63,7 +61,6 @@ int AddInCppUniquePtr(std::unique_ptr<Abase<SerNo>> obj, int other_val) {
     return obj->Add(other_val) * 100 + 13;
 }
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 template <int SerNo>
 void wrap(py::module_ m, const char *py_class_name) {
     py::classh<Abase<SerNo>, AbaseAlias<SerNo>>(m, py_class_name)
@@ -75,24 +72,13 @@ void wrap(py::module_ m, const char *py_class_name) {
     m.def("AddInCppSharedPtr", AddInCppSharedPtr<SerNo>, py::arg("obj"), py::arg("other_val"));
     m.def("AddInCppUniquePtr", AddInCppUniquePtr<SerNo>, py::arg("obj"), py::arg("other_val"));
 }
-#endif
 
 } // namespace class_sh_trampoline_basic
 } // namespace pybind11_tests
 
 using namespace pybind11_tests::class_sh_trampoline_basic;
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(Abase<0>)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(Abase<1>)
-
 TEST_SUBMODULE(class_sh_trampoline_basic, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     wrap<0>(m, "Abase0");
     wrap<1>(m, "Abase1");
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_trampoline_basic.py

@@ -4,9 +4,6 @@ import pytest
 
 from pybind11_tests import class_sh_trampoline_basic as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 class PyDrvd0(m.Abase0):
     def __init__(self, val):

tests/test_class_sh_trampoline_self_life_support.cpp

@@ -38,26 +38,16 @@ protected:
     Big5() : history{"DefaultConstructor"} {}
 };
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 struct Big5Trampoline : Big5, py::trampoline_self_life_support {
     using Big5::Big5;
 };
-#endif
 
 } // namespace class_sh_trampoline_self_life_support
 } // namespace pybind11_tests
 
 using namespace pybind11_tests::class_sh_trampoline_self_life_support;
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(Big5)
-
 TEST_SUBMODULE(class_sh_trampoline_self_life_support, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     py::classh<Big5, Big5Trampoline>(m, "Big5")
         .def(py::init<std::string>())
         .def_readonly("history", &Big5::history);
@@ -94,5 +84,4 @@ TEST_SUBMODULE(class_sh_trampoline_self_life_support, m) {
         py::object o1 = py::cast(std::move(obj));
         return py::make_tuple(o1, o2);
     });
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_trampoline_self_life_support.py

@@ -4,9 +4,6 @@ import pytest
 
 import pybind11_tests.class_sh_trampoline_self_life_support as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 class PyBig5(m.Big5):
     pass

tests/test_class_sh_trampoline_shared_from_this.cpp

@@ -71,11 +71,9 @@ struct SftSharedPtrStash {
     }
 };
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 struct SftTrampoline : Sft, py::trampoline_self_life_support {
     using Sft::Sft;
 };
-#endif
 
 long use_count(const std::shared_ptr<Sft> &obj) { return obj.use_count(); }
 
@@ -111,16 +109,7 @@ std::shared_ptr<Sft> pass_through_shd_ptr(const std::shared_ptr<Sft> &obj) { ret
 
 using namespace pybind11_tests::class_sh_trampoline_shared_from_this;
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(Sft)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(SftSharedPtrStash)
-
 TEST_SUBMODULE(class_sh_trampoline_shared_from_this, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     py::classh<Sft, SftTrampoline>(m, "Sft")
         .def(py::init<const std::string &>())
         .def(py::init([](const std::string &history, int) {
@@ -146,5 +135,4 @@ TEST_SUBMODULE(class_sh_trampoline_shared_from_this, m) {
     m.def("make_pure_cpp_sft_unq_ptr", make_pure_cpp_sft_unq_ptr);
     m.def("make_pure_cpp_sft_shd_ptr", make_pure_cpp_sft_shd_ptr);
     m.def("pass_through_shd_ptr", pass_through_shd_ptr);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_trampoline_shared_from_this.py

@@ -8,9 +8,6 @@ import pytest
 import env
 import pybind11_tests.class_sh_trampoline_shared_from_this as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 class PySft(m.Sft):
     pass

tests/test_class_sh_trampoline_shared_ptr_cpp_arg.cpp

@@ -57,18 +57,7 @@ struct SpGoAwayTester {
 
 using namespace pybind11_tests::class_sh_trampoline_shared_ptr_cpp_arg;
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(SpBase)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(SpBaseTester)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(SpGoAway)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(SpGoAwayTester)
-
 TEST_SUBMODULE(class_sh_trampoline_shared_ptr_cpp_arg, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     // For testing whether a python subclass of a C++ object dies when the
     // last python reference is lost
 
@@ -101,5 +90,4 @@ TEST_SUBMODULE(class_sh_trampoline_shared_ptr_cpp_arg, m) {
     py::classh<SpGoAwayTester>(m, "SpGoAwayTester")
         .def(py::init<>())
         .def_readwrite("obj", &SpGoAwayTester::m_obj);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_trampoline_shared_ptr_cpp_arg.py

@@ -5,9 +5,6 @@ import pytest
 import env  # noqa: F401
 import pybind11_tests.class_sh_trampoline_shared_ptr_cpp_arg as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 @pytest.mark.skipif("env.GRAALPY", reason="Cannot reliably trigger GC")
 def test_shared_ptr_cpp_arg():

tests/test_class_sh_trampoline_unique_ptr.cpp

@@ -34,12 +34,9 @@ private:
 } // namespace class_sh_trampoline_unique_ptr
 } // namespace pybind11_tests
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_trampoline_unique_ptr::Class)
-
 namespace pybind11_tests {
 namespace class_sh_trampoline_unique_ptr {
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 class PyClass : public Class, public py::trampoline_self_life_support {
 public:
     std::unique_ptr<Class> clone() const override {
@@ -48,18 +45,11 @@ public:
 
     int foo() const override { PYBIND11_OVERRIDE_PURE(int, Class, foo); }
 };
-#endif
 
 } // namespace class_sh_trampoline_unique_ptr
 } // namespace pybind11_tests
 
 TEST_SUBMODULE(class_sh_trampoline_unique_ptr, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     using namespace pybind11_tests::class_sh_trampoline_unique_ptr;
 
     py::classh<Class, PyClass>(m, "Class")
@@ -71,5 +61,4 @@ TEST_SUBMODULE(class_sh_trampoline_unique_ptr, m) {
 
     m.def("clone", [](const Class &obj) { return obj.clone(); });
     m.def("clone_and_foo", [](const Class &obj) { return obj.clone()->foo(); });
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_trampoline_unique_ptr.py

@@ -1,12 +1,7 @@
 from __future__ import annotations
 
-import pytest
-
 import pybind11_tests.class_sh_trampoline_unique_ptr as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 class MyClass(m.Class):
     def foo(self):

tests/test_class_sh_unique_ptr_custom_deleter.cpp

@@ -22,25 +22,10 @@ private:
     explicit Pet(const std::string &name) : name(name) {}
 };
 
-} // namespace class_sh_unique_ptr_custom_deleter
-} // namespace pybind11_tests
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_unique_ptr_custom_deleter::Pet)
-
-namespace pybind11_tests {
-namespace class_sh_unique_ptr_custom_deleter {
-
 TEST_SUBMODULE(class_sh_unique_ptr_custom_deleter, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     py::classh<Pet>(m, "Pet").def_readwrite("name", &Pet::name);
 
     m.def("create", &Pet::New);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }
 
 } // namespace class_sh_unique_ptr_custom_deleter

tests/test_class_sh_unique_ptr_custom_deleter.py

@@ -1,12 +1,7 @@
 from __future__ import annotations
 
-import pytest
-
 from pybind11_tests import class_sh_unique_ptr_custom_deleter as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_create():
     pet = m.create("abc")

tests/test_class_sh_unique_ptr_member.cpp

@@ -36,21 +36,7 @@ private:
     std::unique_ptr<pointee> ptr_;
 };
 
-} // namespace class_sh_unique_ptr_member
-} // namespace pybind11_tests
-
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(pybind11_tests::class_sh_unique_ptr_member::pointee)
-
-namespace pybind11_tests {
-namespace class_sh_unique_ptr_member {
-
 TEST_SUBMODULE(class_sh_unique_ptr_member, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     py::classh<pointee>(m, "pointee").def(py::init<>()).def("get_int", &pointee::get_int);
 
     m.def("make_unique_pointee", make_unique_pointee);
@@ -60,7 +46,6 @@ TEST_SUBMODULE(class_sh_unique_ptr_member, m) {
         .def("is_owner", &ptr_owner::is_owner)
         .def("give_up_ownership_via_unique_ptr", &ptr_owner::give_up_ownership_via_unique_ptr)
         .def("give_up_ownership_via_shared_ptr", &ptr_owner::give_up_ownership_via_shared_ptr);
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }
 
 } // namespace class_sh_unique_ptr_member

tests/test_class_sh_unique_ptr_member.py

@@ -4,9 +4,6 @@ import pytest
 
 from pybind11_tests import class_sh_unique_ptr_member as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 def test_make_unique_pointee():
     obj = m.make_unique_pointee()

tests/test_class_sh_virtual_py_cpp_mix.cpp

@@ -31,8 +31,6 @@ int get_from_cpp_plainc_ptr(const Base *b) { return b->get() + 4000; }
 
 int get_from_cpp_unique_ptr(std::unique_ptr<Base> b) { return b->get() + 5000; }
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 struct BaseVirtualOverrider : Base, py::trampoline_self_life_support {
     using Base::Base;
 
@@ -45,24 +43,12 @@ struct CppDerivedVirtualOverrider : CppDerived, py::trampoline_self_life_support
     int get() const override { PYBIND11_OVERRIDE(int, CppDerived, get); }
 };
 
-#endif
-
 } // namespace class_sh_virtual_py_cpp_mix
 } // namespace pybind11_tests
 
 using namespace pybind11_tests::class_sh_virtual_py_cpp_mix;
 
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(Base)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(CppDerivedPlain)
-PYBIND11_SMART_HOLDER_TYPE_CASTERS(CppDerived)
-
 TEST_SUBMODULE(class_sh_virtual_py_cpp_mix, m) {
-    m.attr("defined_PYBIND11_SMART_HOLDER_ENABLED") =
-#ifndef PYBIND11_SMART_HOLDER_ENABLED
-        false;
-#else
-        true;
-
     py::classh<Base, BaseVirtualOverrider>(m, "Base").def(py::init<>()).def("get", &Base::get);
 
     py::classh<CppDerivedPlain, Base>(m, "CppDerivedPlain").def(py::init<>());
@@ -71,5 +57,4 @@ TEST_SUBMODULE(class_sh_virtual_py_cpp_mix, m) {
 
     m.def("get_from_cpp_plainc_ptr", get_from_cpp_plainc_ptr, py::arg("b"));
     m.def("get_from_cpp_unique_ptr", get_from_cpp_unique_ptr, py::arg("b"));
-#endif // PYBIND11_SMART_HOLDER_ENABLED
 }

tests/test_class_sh_virtual_py_cpp_mix.py

@@ -4,9 +4,6 @@ import pytest
 
 from pybind11_tests import class_sh_virtual_py_cpp_mix as m
 
-if not m.defined_PYBIND11_SMART_HOLDER_ENABLED:
-    pytest.skip("smart_holder not available.", allow_module_level=True)
-
 
 class PyBase(m.Base):  # Avoiding name PyDerived, for more systematic naming.
     def __init__(self):

tests/test_eigen_matrix.cpp

@@ -440,4 +440,8 @@ TEST_SUBMODULE(eigen_matrix, m) {
         py::module_::import("numpy").attr("ones")(10);
         return v[0](5);
     });
+    m.def("round_trip_vector", [](const Eigen::VectorXf &x) -> Eigen::VectorXf { return x; });
+    m.def("round_trip_dense", [](const DenseMatrixR &m) -> DenseMatrixR { return m; });
+    m.def("round_trip_dense_ref",
+          [](const Eigen::Ref<DenseMatrixR> &m) -> Eigen::Ref<DenseMatrixR> { return m; });
 }

tests/test_eigen_matrix.py

@@ -95,19 +95,20 @@ def test_mutator_descriptors():
     with pytest.raises(TypeError) as excinfo:
         m.fixed_mutator_r(zc)
     assert (
-        "(arg0: numpy.ndarray[numpy.float32[5, 6],"
+        '(arg0: typing.Annotated[numpy.typing.NDArray[numpy.float32], "[5, 6]",'
-        " flags.writeable, flags.c_contiguous]) -> None" in str(excinfo.value)
+        ' "flags.writeable", "flags.c_contiguous"]) -> None' in str(excinfo.value)
     )
     with pytest.raises(TypeError) as excinfo:
         m.fixed_mutator_c(zr)
     assert (
-        "(arg0: numpy.ndarray[numpy.float32[5, 6],"
+        '(arg0: typing.Annotated[numpy.typing.NDArray[numpy.float32], "[5, 6]",'
-        " flags.writeable, flags.f_contiguous]) -> None" in str(excinfo.value)
+        ' "flags.writeable", "flags.f_contiguous"]) -> None' in str(excinfo.value)
     )
     with pytest.raises(TypeError) as excinfo:
         m.fixed_mutator_a(np.array([[1, 2], [3, 4]], dtype="float32"))
-    assert "(arg0: numpy.ndarray[numpy.float32[5, 6], flags.writeable]) -> None" in str(
+    assert (
-        excinfo.value
+        '(arg0: typing.Annotated[numpy.typing.NDArray[numpy.float32], "[5, 6]", "flags.writeable"]) -> None'
+        in str(excinfo.value)
     )
     zr.flags.writeable = False
     with pytest.raises(TypeError):
@@ -201,7 +202,7 @@ def test_negative_stride_from_python(msg):
         msg(excinfo.value)
         == """
         double_threer(): incompatible function arguments. The following argument types are supported:
-            1. (arg0: numpy.ndarray[numpy.float32[1, 3], flags.writeable]) -> None
+            1. (arg0: typing.Annotated[numpy.typing.NDArray[numpy.float32], "[1, 3]", "flags.writeable"]) -> None
 
         Invoked with: """
         + repr(np.array([5.0, 4.0, 3.0], dtype="float32"))
@@ -213,7 +214,7 @@ def test_negative_stride_from_python(msg):
         msg(excinfo.value)
         == """
         double_threec(): incompatible function arguments. The following argument types are supported:
-            1. (arg0: numpy.ndarray[numpy.float32[3, 1], flags.writeable]) -> None
+            1. (arg0: typing.Annotated[numpy.typing.NDArray[numpy.float32], "[3, 1]", "flags.writeable"]) -> None
 
         Invoked with: """
         + repr(np.array([7.0, 4.0, 1.0], dtype="float32"))
@@ -634,16 +635,16 @@ def test_nocopy_wrapper():
     with pytest.raises(TypeError) as excinfo:
         m.get_elem_nocopy(int_matrix_colmajor)
     assert "get_elem_nocopy(): incompatible function arguments." in str(excinfo.value)
-    assert ", flags.f_contiguous" in str(excinfo.value)
+    assert ', "flags.f_contiguous"' in str(excinfo.value)
     assert m.get_elem_nocopy(dbl_matrix_colmajor) == 8
     with pytest.raises(TypeError) as excinfo:
         m.get_elem_nocopy(int_matrix_rowmajor)
     assert "get_elem_nocopy(): incompatible function arguments." in str(excinfo.value)
-    assert ", flags.f_contiguous" in str(excinfo.value)
+    assert ', "flags.f_contiguous"' in str(excinfo.value)
     with pytest.raises(TypeError) as excinfo:
         m.get_elem_nocopy(dbl_matrix_rowmajor)
     assert "get_elem_nocopy(): incompatible function arguments." in str(excinfo.value)
-    assert ", flags.f_contiguous" in str(excinfo.value)
+    assert ', "flags.f_contiguous"' in str(excinfo.value)
 
     # For the row-major test, we take a long matrix in row-major, so only the third is allowed:
     with pytest.raises(TypeError) as excinfo:
@@ -651,20 +652,20 @@ def test_nocopy_wrapper():
     assert "get_elem_rm_nocopy(): incompatible function arguments." in str(
         excinfo.value
     )
-    assert ", flags.c_contiguous" in str(excinfo.value)
+    assert ', "flags.c_contiguous"' in str(excinfo.value)
     with pytest.raises(TypeError) as excinfo:
         m.get_elem_rm_nocopy(dbl_matrix_colmajor)
     assert "get_elem_rm_nocopy(): incompatible function arguments." in str(
         excinfo.value
     )
-    assert ", flags.c_contiguous" in str(excinfo.value)
+    assert ', "flags.c_contiguous"' in str(excinfo.value)
     assert m.get_elem_rm_nocopy(int_matrix_rowmajor) == 8
     with pytest.raises(TypeError) as excinfo:
         m.get_elem_rm_nocopy(dbl_matrix_rowmajor)
     assert "get_elem_rm_nocopy(): incompatible function arguments." in str(
         excinfo.value
     )
-    assert ", flags.c_contiguous" in str(excinfo.value)
+    assert ', "flags.c_contiguous"' in str(excinfo.value)
 
 
 def test_eigen_ref_life_support():
@@ -700,25 +701,25 @@ def test_dense_signature(doc):
     assert (
         doc(m.double_col)
         == """
-        double_col(arg0: numpy.ndarray[numpy.float32[m, 1]]) -> numpy.ndarray[numpy.float32[m, 1]]
+        double_col(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float32, "[m, 1]"]) -> typing.Annotated[numpy.typing.NDArray[numpy.float32], "[m, 1]"]
     """
     )
     assert (
         doc(m.double_row)
         == """
-        double_row(arg0: numpy.ndarray[numpy.float32[1, n]]) -> numpy.ndarray[numpy.float32[1, n]]
+        double_row(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float32, "[1, n]"]) -> typing.Annotated[numpy.typing.NDArray[numpy.float32], "[1, n]"]
     """
     )
     assert doc(m.double_complex) == (
         """
-        double_complex(arg0: numpy.ndarray[numpy.complex64[m, 1]])"""
+        double_complex(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.complex64, "[m, 1]"])"""
-        """ -> numpy.ndarray[numpy.complex64[m, 1]]
+        """ -> typing.Annotated[numpy.typing.NDArray[numpy.complex64], "[m, 1]"]
     """
     )
     assert doc(m.double_mat_rm) == (
         """
-        double_mat_rm(arg0: numpy.ndarray[numpy.float32[m, n]])"""
+        double_mat_rm(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float32, "[m, n]"])"""
-        """ -> numpy.ndarray[numpy.float32[m, n]]
+        """ -> typing.Annotated[numpy.typing.NDArray[numpy.float32], "[m, n]"]
     """
     )
 
@@ -817,3 +818,22 @@ def test_custom_operator_new():
     o = m.CustomOperatorNew()
     np.testing.assert_allclose(o.a, 0.0)
     np.testing.assert_allclose(o.b.diagonal(), 1.0)
+
+
+def test_arraylike_signature(doc):
+    assert doc(m.round_trip_vector) == (
+        'round_trip_vector(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float32, "[m, 1]"])'
+        ' -> typing.Annotated[numpy.typing.NDArray[numpy.float32], "[m, 1]"]'
+    )
+    assert doc(m.round_trip_dense) == (
+        'round_trip_dense(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float32, "[m, n]"])'
+        ' -> typing.Annotated[numpy.typing.NDArray[numpy.float32], "[m, n]"]'
+    )
+    assert doc(m.round_trip_dense_ref) == (
+        'round_trip_dense_ref(arg0: typing.Annotated[numpy.typing.NDArray[numpy.float32], "[m, n]", "flags.writeable", "flags.c_contiguous"])'
+        ' -> typing.Annotated[numpy.typing.NDArray[numpy.float32], "[m, n]", "flags.writeable", "flags.c_contiguous"]'
+    )
+    m.round_trip_vector([1.0, 2.0])
+    m.round_trip_dense([[1.0, 2.0], [3.0, 4.0]])
+    with pytest.raises(TypeError, match="incompatible function arguments"):
+        m.round_trip_dense_ref([[1.0, 2.0], [3.0, 4.0]])

tests/test_eigen_tensor.py

@@ -271,23 +271,46 @@ def test_round_trip_references_actually_refer(m):
 @pytest.mark.parametrize("m", submodules)
 def test_doc_string(m, doc):
     assert (
-        doc(m.copy_tensor) == "copy_tensor() -> numpy.ndarray[numpy.float64[?, ?, ?]]"
+        doc(m.copy_tensor)
+        == 'copy_tensor() -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]"]'
     )
     assert (
         doc(m.copy_fixed_tensor)
-        == "copy_fixed_tensor() -> numpy.ndarray[numpy.float64[3, 5, 2]]"
+        == 'copy_fixed_tensor() -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[3, 5, 2]"]'
     )
     assert (
         doc(m.reference_const_tensor)
-        == "reference_const_tensor() -> numpy.ndarray[numpy.float64[?, ?, ?]]"
+        == 'reference_const_tensor() -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]"]'
     )
 
-    order_flag = f"flags.{m.needed_options.lower()}_contiguous"
+    order_flag = f'"flags.{m.needed_options.lower()}_contiguous"'
     assert doc(m.round_trip_view_tensor) == (
-        f"round_trip_view_tensor(arg0: numpy.ndarray[numpy.float64[?, ?, ?], flags.writeable, {order_flag}])"
+        f'round_trip_view_tensor(arg0: typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]", "flags.writeable", {order_flag}])'
-        f" -> numpy.ndarray[numpy.float64[?, ?, ?], flags.writeable, {order_flag}]"
+        f' -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]", "flags.writeable", {order_flag}]'
     )
     assert doc(m.round_trip_const_view_tensor) == (
-        f"round_trip_const_view_tensor(arg0: numpy.ndarray[numpy.float64[?, ?, ?], {order_flag}])"
+        f'round_trip_const_view_tensor(arg0: typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]", {order_flag}])'
-        " -> numpy.ndarray[numpy.float64[?, ?, ?]]"
+        ' -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]"]'
     )
+
+
+@pytest.mark.parametrize("m", submodules)
+def test_arraylike_signature(m, doc):
+    order_flag = f'"flags.{m.needed_options.lower()}_contiguous"'
+    assert doc(m.round_trip_tensor) == (
+        'round_trip_tensor(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float64, "[?, ?, ?]"])'
+        ' -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]"]'
+    )
+    assert doc(m.round_trip_tensor_noconvert) == (
+        'round_trip_tensor_noconvert(tensor: typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]"])'
+        ' -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]"]'
+    )
+    assert doc(m.round_trip_view_tensor) == (
+        f'round_trip_view_tensor(arg0: typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]", "flags.writeable", {order_flag}])'
+        f' -> typing.Annotated[numpy.typing.NDArray[numpy.float64], "[?, ?, ?]", "flags.writeable", {order_flag}]'
+    )
+    m.round_trip_tensor(tensor_ref.tolist())
+    with pytest.raises(TypeError, match="incompatible function arguments"):
+        m.round_trip_tensor_noconvert(tensor_ref.tolist())
+    with pytest.raises(TypeError, match="incompatible function arguments"):
+        m.round_trip_view_tensor(tensor_ref.tolist())

tests/test_numpy_array.cpp

@@ -586,4 +586,13 @@ TEST_SUBMODULE(numpy_array, sm) {
     sm.def("return_array_pyobject_ptr_from_list", return_array_from_list<PyObject *>);
     sm.def("return_array_handle_from_list", return_array_from_list<py::handle>);
     sm.def("return_array_object_from_list", return_array_from_list<py::object>);
+
+    sm.def(
+        "round_trip_array_t",
+        [](const py::array_t<float> &x) -> py::array_t<float> { return x; },
+        py::arg("x"));
+    sm.def(
+        "round_trip_array_t_noconvert",
+        [](const py::array_t<float> &x) -> py::array_t<float> { return x; },
+        py::arg("x").noconvert());
 }

tests/test_numpy_array.py

@@ -321,13 +321,13 @@ def test_overload_resolution(msg):
         msg(excinfo.value)
         == """
         overloaded(): incompatible function arguments. The following argument types are supported:
-            1. (arg0: numpy.ndarray[numpy.float64]) -> str
+            1. (arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float64]) -> str
-            2. (arg0: numpy.ndarray[numpy.float32]) -> str
+            2. (arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.float32]) -> str
-            3. (arg0: numpy.ndarray[numpy.int32]) -> str
+            3. (arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.int32]) -> str
-            4. (arg0: numpy.ndarray[numpy.uint16]) -> str
+            4. (arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.uint16]) -> str
-            5. (arg0: numpy.ndarray[numpy.int64]) -> str
+            5. (arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.int64]) -> str
-            6. (arg0: numpy.ndarray[numpy.complex128]) -> str
+            6. (arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.complex128]) -> str
-            7. (arg0: numpy.ndarray[numpy.complex64]) -> str
+            7. (arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.complex64]) -> str
 
         Invoked with: 'not an array'
     """
@@ -343,8 +343,8 @@ def test_overload_resolution(msg):
     assert m.overloaded3(np.array([1], dtype="intc")) == "int"
     expected_exc = """
         overloaded3(): incompatible function arguments. The following argument types are supported:
-            1. (arg0: numpy.ndarray[numpy.int32]) -> str
+            1. (arg0: numpy.typing.NDArray[numpy.int32]) -> str
-            2. (arg0: numpy.ndarray[numpy.float64]) -> str
+            2. (arg0: numpy.typing.NDArray[numpy.float64]) -> str
 
         Invoked with: """
 
@@ -528,7 +528,7 @@ def test_index_using_ellipsis():
     ],
 )
 def test_format_descriptors_for_floating_point_types(test_func):
-    assert "numpy.ndarray[numpy.float" in test_func.__doc__
+    assert "numpy.typing.ArrayLike, numpy.float" in test_func.__doc__
 
 
 @pytest.mark.parametrize("forcecast", [False, True])
@@ -687,3 +687,17 @@ def test_return_array_object_cpp_loop(return_array, unwrap):
     assert isinstance(arr_from_list, np.ndarray)
     assert arr_from_list.dtype == np.dtype("O")
     assert unwrap(arr_from_list) == [6, "seven", -8.0]
+
+
+def test_arraylike_signature(doc):
+    assert (
+        doc(m.round_trip_array_t)
+        == "round_trip_array_t(x: typing.Annotated[numpy.typing.ArrayLike, numpy.float32]) -> numpy.typing.NDArray[numpy.float32]"
+    )
+    assert (
+        doc(m.round_trip_array_t_noconvert)
+        == "round_trip_array_t_noconvert(x: numpy.typing.NDArray[numpy.float32]) -> numpy.typing.NDArray[numpy.float32]"
+    )
+    m.round_trip_array_t([1, 2, 3])
+    with pytest.raises(TypeError, match="incompatible function arguments"):
+        m.round_trip_array_t_noconvert([1, 2, 3])

tests/test_numpy_dtypes.py

@@ -373,7 +373,7 @@ def test_complex_array():
 def test_signature(doc):
     assert (
         doc(m.create_rec_nested)
-        == "create_rec_nested(arg0: int) -> numpy.ndarray[NestedStruct]"
+        == "create_rec_nested(arg0: int) -> numpy.typing.NDArray[NestedStruct]"
     )
 
 

tests/test_numpy_vectorize.py

@@ -150,7 +150,7 @@ def test_docs(doc):
     assert (
         doc(m.vectorized_func)
         == """
-        vectorized_func(arg0: numpy.ndarray[numpy.int32], arg1: numpy.ndarray[numpy.float32], arg2: numpy.ndarray[numpy.float64]) -> object
+        vectorized_func(arg0: typing.Annotated[numpy.typing.ArrayLike, numpy.int32], arg1: typing.Annotated[numpy.typing.ArrayLike, numpy.float32], arg2: typing.Annotated[numpy.typing.ArrayLike, numpy.float64]) -> object
     """
     )
 
@@ -212,12 +212,12 @@ def test_passthrough_arguments(doc):
         + ", ".join(
             [
                 "arg0: float",
-                "arg1: numpy.ndarray[numpy.float64]",
+                "arg1: typing.Annotated[numpy.typing.ArrayLike, numpy.float64]",
-                "arg2: numpy.ndarray[numpy.float64]",
+                "arg2: typing.Annotated[numpy.typing.ArrayLike, numpy.float64]",
-                "arg3: numpy.ndarray[numpy.int32]",
+                "arg3: typing.Annotated[numpy.typing.ArrayLike, numpy.int32]",
                 "arg4: int",
                 "arg5: m.numpy_vectorize.NonPODClass",
-                "arg6: numpy.ndarray[numpy.float64]",
+                "arg6: typing.Annotated[numpy.typing.ArrayLike, numpy.float64]",
             ]
         )
         + ") -> object"

ubench/holder_comparison.cpp

@@ -22,8 +22,6 @@ void wrap_number_bucket(py::module m, const char *class_name) {
         .def("add", &WrappedType::add, py::arg("other"));
 }
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
-
 template <typename T>
 class padded_unique_ptr {
     std::unique_ptr<T> ptr;
@@ -37,21 +35,15 @@ public:
 static_assert(sizeof(padded_unique_ptr<nb_pu>) == sizeof(py::smart_holder),
               "Unexpected sizeof mismatch.");
 
-#endif
-
 } // namespace hc
 
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
 PYBIND11_DECLARE_HOLDER_TYPE(T, hc::padded_unique_ptr<T>);
-#endif
 
 PYBIND11_MODULE(pybind11_ubench_holder_comparison, m) {
     using namespace hc;
     wrap_number_bucket<nb_up, std::unique_ptr<nb_up>>(m, "number_bucket_up");
     wrap_number_bucket<nb_sp, std::shared_ptr<nb_sp>>(m, "number_bucket_sp");
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
     m.def("sizeof_smart_holder", []() { return sizeof(py::smart_holder); });
     wrap_number_bucket<nb_pu, padded_unique_ptr<nb_pu>>(m, "number_bucket_pu");
     wrap_number_bucket<nb_sh, py::smart_holder>(m, "number_bucket_sh");
-#endif
 }