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[smart_holder] Bake smart_holder functionality into class_ and type_caster_base (#5257)

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* Put bakein branch @ 18b72c0ffa on top of smart_holder branch:

Commands used:

```
git checkout bakein
git diff smart_holder > ~/zd
git checkout smart_holder
git checkout -b bakein_sh
patch -p 1 < ~/zd
git checkout smart_holder \
MANIFEST.in \
README.rst \
README_smart_holder.rst \
docs/advanced/smart_ptrs.rst \
ubench/holder_comparison.cpp \
ubench/holder_comparison.py \
ubench/holder_comparison_extract_sheet_data.py \
ubench/number_bucket.h \
ubench/python/number_bucket.clif
git add -A
```

* Add back README_smart_holder.rst in tests/extra_python_package/test_files.py

* Restore smart_holder_poc.h as-is on smart_holder branch (i.e. undo `PYBIND11_SMART_HOLDER_PADDING`, which was meant for stress-testing only).

* Insert `std::move()` as suggested by @laramiel

* `property_cpp_function_sh_*` named specializations, as suggested by @laramiel (https://github.com/pybind/pybind11/pull/5257#discussion_r1688346807)

* Call `property_cpp_function_classic` member functions, rather than inlining the implementations.

* Use `PYBIND11_HAVE_INTERNALS_WITH_SMART_HOLDER_SUPPORT` in holder_comparison.cpp (holder_comparison.py is NOT changed accordingly in this commit, i.e. can still only be run if the smart_holder functionality is available).

* Systematically rename `loaded_as` to `load_as` (`shared_ptr`, `unique_ptr`) as suggested by @laramiel

* Make change as suggested by @laramiel. This makes it much more obvious that the latest implementation of `smart_holder_from_unique_ptr()` accepts all existing `return_value_policy` enum values except `copy`.

* Resolve `BAKEIN_WIP: Rewrite comment.` for `property_cpp_function_*` specializations.

* Resolve `BAKEIN_WIP: Add comment to explain: This is meant for stress-testing only.`

* Resolve all remaining BAKEIN_WIP (in pybind11/cast.h).

Leave only two pairs of SMART_HOLDER_BAKEIN_FOLLOW_ON comments: refactoring of copyable_holder_caster, move_only_holder_caster. This is best left until after the smart_holder branch is merged into the master branch.

* Remove obsolete `using holder_type = smart_holder;` in `load_helper`

* Add SMART_HOLDER_BAKEIN_FOLLOW_ON comment for `internals::default_holder`

* README_smart_holder.rst update (line count reduced from 356 to 123).
This commit is contained in:
Ralf W. Grosse-Kunstleve
2024-07-31 20:17:31 +07:00
committed by GitHub
parent 6765d4e814
commit 48f25275c4
68 changed files with 1331 additions and 1765 deletions
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36
tests/test_smart_ptr.cpp
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@@ -287,42 +287,6 @@ PYBIND11_DECLARE_HOLDER_TYPE(T, custom_unique_ptr<T>);
PYBIND11_DECLARE_HOLDER_TYPE(T, shared_ptr_with_addressof_operator<T>);
PYBIND11_DECLARE_HOLDER_TYPE(T, unique_ptr_with_addressof_operator<T>);
PYBIND11_TYPE_CASTER_BASE_HOLDER(Object, ref<Object>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(MyObject1, ref<MyObject1>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(MyObject2, std::shared_ptr<MyObject2>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(MyObject3, std::shared_ptr<MyObject3>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(MyObject4, std::unique_ptr<MyObject4, py::nodelete>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(MyObject4a, std::unique_ptr<MyObject4a, py::nodelete>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(MyObject4b, std::unique_ptr<MyObject4b>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(MyObject5, huge_unique_ptr<MyObject5>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(SharedPtrRef::A, std::shared_ptr<SharedPtrRef::A>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(SharedPtrRef, std::unique_ptr<SharedPtrRef>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(SharedFromThisRef::B, std::shared_ptr<SharedFromThisRef::B>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(SharedFromThisRef, std::unique_ptr<SharedFromThisRef>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(SharedFromThisVirt, std::shared_ptr<SharedFromThisVirt>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(C, custom_unique_ptr<C>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(TypeForHolderWithAddressOf,
shared_ptr_with_addressof_operator<TypeForHolderWithAddressOf>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(
TypeForMoveOnlyHolderWithAddressOf,
unique_ptr_with_addressof_operator<TypeForMoveOnlyHolderWithAddressOf>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(HeldByDefaultHolder, std::unique_ptr<HeldByDefaultHolder>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(ElementBase, std::shared_ptr<ElementBase>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(ElementA, std::shared_ptr<ElementA>)
PYBIND11_TYPE_CASTER_BASE_HOLDER(ElementList, std::shared_ptr<ElementList>)
#ifdef PYBIND11_USE_SMART_HOLDER_AS_DEFAULT
// To prevent triggering a static_assert in the smart_holder code.
// This is a very special case, because the associated test exercises a holder mismatch.
namespace pybind11 {
namespace detail {
template <>
class type_caster<std::shared_ptr<HeldByDefaultHolder>>
: public copyable_holder_caster<HeldByDefaultHolder, std::shared_ptr<HeldByDefaultHolder>> {};
} // namespace detail
} // namespace pybind11
#endif
TEST_SUBMODULE(smart_ptr, m) {
// Please do not interleave `struct` and `class` definitions with bindings code,
// but implement `struct`s and `class`es in the anonymous namespace above.