* Add return_as_bytes policy

* Fix format

* Fix test failures

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* Fix std::variant

* Resolve comments

* Note this policy experimental

* Add tests for `return_as_bytes` with `def_property`.

* Change comment for the new return_as_bytes enum to note that the policy is not available on master.

* Applying pr3838_sh.patch (exactly as used Google-internally since 2022-03-31).

* Add `case return_as_bytes` to `switch`es in detail/type_caster_base.h and eigen.h

Based on systematic review under https://github.com/pybind/pybind11/pull/3838#issuecomment-1094390333



* Add missing break (clang-tidy).

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* Underscore prefix: _return_as_bytes

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* Simplify numpy dtype ctor

* Simplify c_str ctor

* Remove compat macro for str in numpy

* Added deleted copy constructor for error_scope to comply with rule of 3.

* Added constructor based on typenum, based on PyArray_DescrFromType

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* Fixed the comment for alignment method

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* Adds set_name method of pybind11::capsule class

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modified destructors to query capsules's Name

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* get_name_or_throw->get_name_no_throw

If PyCapsule_GetName raises an error we should write as unraisable
to consume it and notify user, and then restore the error in flight if any.
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* ci: drop dead windows CI jobs

* chore: touch up pre-commit

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* Update configure.yml

* Update configure.yml

* Cleanup cast_safe<void> specialization

Replace explicit specialization of cast_safe<void> with SFINAE.
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Extracted from #3674

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* Update cast.h

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* Update cast.h

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If VOID
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* Make stl_bind take slice as const_ref

* Change eval order if

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* Add more missing std::move for ref steals

* Add missing perfect forwarding for arg_v ctor

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* Revert "Add missing move in arg_v constructor"

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* Add another missing move in cast.h

* Optimize object move ctor

* Don't do useless move

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* Make obj move ctor same as nb

* Revert changes which break MSVC

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* feature: support compilers that use std::experimental::filesystem such as gcc7

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* only use this feature if cpp17

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* more specific namespace alias + style

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* move to pybind11 namespace

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* chore: bump changelog for 2.9.2

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* Update docs/changelog.rst

* style: bump black

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* fix: pycln broken by typer breakage

* Improve str exceptions

* Revert macro change just in case

* Make clang-tidy happy

* Fix one more clang-tidy issue

* Refactor duplicate method

* Revert "ci: test pypy 3.9 (#3789)"

This reverts commit 461937d3.

* Update ci.yml

* ci: test pypy 3.9

* ci: try a use of FindPython with PyPy

* Make capsule errors better match python

* Add missing move in sp matrix caster and microopt char concat

* Remove useless move

* Add a couple more std::move

* Missed one char

* Improve error_string

* Ensure no temp reallocs in errorString concat

* Remove useless move

* Add type_caster<std::monostate> for std::variant

Add type_caster<std::monostate>, allowing std::variant<std::monostate, ...>

* Add  variant<std::monostate, ...> test methods

* Add std::monostate tests

* Update test_stl.py

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* Update test fn name

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* PYBIND11_OBJECT_CVT should use namespace for error_already_set()

This change makes the macro usable outside of pybind11 namespace.

* added test for use of PYBIND11_OBJECT_CVT for classes in external to pybind11 namespaces

* Extended test_pytypes.cpp and test_pytest.py

The added test defines a dummy function that takes a custom-defined class external::float_
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* fixed issues pointed out by CI

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* fixed memory leak in default constructor

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Nearly every call site of cast_op<T> uses an r-value reference.

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* Fixes issue

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* Fix again

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* Fix test

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The docs were not 100% the same as we advertise with our
tooling function: most users do not want to strip symbols
in Debug builds.