Commit Graph

1302 Commits

Author SHA1 Message Date
Boris Staletic
5cd3750757
Enable -Wstrict-aliasing warning (#2816)
* Enable -Wstrict-aliasing warning

* Narrow down the scope of -Wstrict-aliasing

* Go home, MSVC, you're drunk

* Make sure "pragma GCC" is not executed on ICC

Co-authored-by: Yannick Jadoul <yannick.jadoul@belgacom.net>
2021-07-15 12:38:52 -04:00
Ralf W. Grosse-Kunstleve
279c93654e Merge branch 'master' into smart_holder 2021-07-13 21:24:02 -07:00
Shane Loretz
7331d381af
Raise codec errors when casting to std::string (#2903)
* Raise codec errors when casting to std::string

Allow the codec's exception to be raised instead of RuntimeError when
casting from py::str to std::string.

PY2 allows ucs surrogates in UTF-8 conversion

Signed-off-by: Shane Loretz <sloretz@openrobotics.org>
Signed-off-by: Shane Loretz <sloretz@osrfoundation.org>

* Attempt to fix py2 error

* Revert all unicode literals

* Fixed

Co-authored-by: Aaron Gokaslan <skylion.aaron@gmail.com>
2021-07-13 21:21:55 -07:00
Ralf W. Grosse-Kunstleve
aca6c3ba37
* Removing stray semicolons (discovered by running clang-format v12 followed by tools/check-style.sh). (#3087)
* Manually moving `// NOLINT` comments so that clang-format does not move them to the wrong places.

* Manually reformatting comments related to `static_assert`s so that clang-format does not need two passes.

* Empty lines between #includes, to prevent clang-format from shuffling the order and thereby confusing MSVC 2015.

* git diff -U0 --no-color HEAD^ | python3 $HOME/clone/llvm-project/clang/tools/clang-format/clang-format-diff.py -p1 -style=file -i
2021-07-13 18:14:58 -07:00
Ralf W. Grosse-Kunstleve
42c123f59d Merge branch 'master' into smart_holder 2021-07-13 13:27:31 -07:00
jbarlow83
2b7985e548
Improve documentation of discard_as_unraisable() API (#2697)
* Improve documentation of discard_as_unraisable() API

* Update pytypes.h

Remove "the above"

* Update pytypes.h

Fix precommit error

Co-authored-by: Aaron Gokaslan <skylion.aaron@gmail.com>
2021-07-13 15:32:56 -04:00
Ralf W. Grosse-Kunstleve
6133fc7b0c Merge branch 'master' into smart_holder 2021-07-13 10:29:36 -07:00
Aaron Gokaslan
25e470c57d
fix(clang-tidy): Add cppcoreguidelines-init-vars,slicing, and throw-by-value-catch-by-reference checks (#3094)
* clang-tidy: guard against more UB behavior

* Remove slicing check for now
2021-07-13 09:54:32 -04:00
Ralf W. Grosse-Kunstleve
932a4cf409 Merge branch 'master' into smart_holder 2021-07-12 14:07:26 -07:00
Henry Schreiner
f0a65c899c
docs(fix): spelling mistake in recent commit 2021-07-12 16:57:28 -04:00
Ralf W. Grosse-Kunstleve
7472d37a93
Adding iostream.h thread-safety documentation. (#2995)
* Adding iostream.h thread-safety documentation.

* Restoring `TestThread` code with added `std::lock_guard<std::mutex>`.

* Updating new comments to reflect new information.

* Fixing up `git rebase -X theirs` accidents.
2021-07-12 13:39:06 -07:00
Ralf W. Grosse-Kunstleve
4a3444ad2f clang-tidy fixes related to the just-merged PR #3080. Also fixing a minor clang-format mishap. 2021-07-09 07:11:07 -07:00
Ralf W. Grosse-Kunstleve
e7d146bdbd Merge branch 'master' into smart_holder 2021-07-09 06:47:46 -07:00
Aaron Gokaslan
b5357d1fa8
fix(clang-tidy): Enable clang-tidy else-after-return and redundant void checks (#3080)
* Enable clang-tidy else-after-return and redundant void checks

* Fix remaining else-after

* Address reviewer comments

* Fix indentation

* Rerun clang-tidy post merge
2021-07-09 06:45:53 -07:00
Ralf W. Grosse-Kunstleve
c03061fcff Merge branch 'master' into smart_holder 2021-07-08 09:48:42 -07:00
Ralf W. Grosse-Kunstleve
6d1b197b46
Splitting out pybind11/stl/filesystem.h. (#3077)
* Splitting out pybind11/stl/filesystem.h.

To solve breakages like: https://github.com/deepmind/open_spiel/runs/2999582108

Mostly following the suggestion here: https://github.com/pybind/pybind11/pull/2730#issuecomment-750507575

Except using pybind11/stl/filesystem.h instead of pybind11/stlfs.h, as decided via chat.

stl.h restored to the exact state before merging PR #2730 via:
```
git checkout 733f8de24f stl.h
```

* Properly including new stl subdirectory in pip wheel config.

This now passes interactively:
```
pytest tests/extra_python_package/
```

* iwyu cleanup.

iwyuh.py -c -std=c++17 -DPYBIND11_TEST_BOOST -Ipybind11/include -I/usr/include/python3.9 -I/usr/include/eigen3 include/pybind11/stl/filesystem.h

* Adding PYBIND11_HAS_FILESYSTEM_IS_OPTIONAL.

* Eliminating else after return.
2021-07-08 09:02:48 -07:00
Robert Haschke
c090c8c409
Unify cast_error message thrown by [simple|unpacking]_collector (#3013)
* Unify cast_error message thrown by [simple|unpacking]_collector

simple_collector and unpacking_collector throw different error messages
when the casting of an argument failed: While the former mentions make_tuple(),
the latter emphasises the call argument (and its name/position).

* Consolidating "Unable to convert call argument" error reporting code to guarantee uniformity.

Co-authored-by: Ralf W. Grosse-Kunstleve <rwgk@google.com>
2021-07-06 15:13:13 -07:00
Ralf W. Grosse-Kunstleve
00b0365ca3 codespell fixes and adding .codespell-ignorelines 2021-07-06 14:31:18 -07:00
Ralf W. Grosse-Kunstleve
704daac879 Merge branch 'master' into smart_holder 2021-07-06 14:12:08 -07:00
luzpaz
8bee61b645
docs: fix various typos (#3075)
Found via `codespell -q 3 -L nd,ot,thist`
2021-07-04 19:58:35 -04:00
Ralf W. Grosse-Kunstleve
52c3f4cc30
This was meant to be PR #3065: pure clang-format changes. NO manual changes. (#3073) 2021-07-02 16:51:24 -07:00
Ralf W. Grosse-Kunstleve
84cbec0bc1 Merge branch 'master' into smart_holder 2021-07-02 07:07:49 -07:00
Dustin Spicuzza
6d4409466b
Check dict item accesses where it isn't already checked (#2863)
* Convert PyDict_GetXXX to internal error checking variant

* Check unlikely error return from PyDict_DelItemString
2021-07-02 07:02:33 -07:00
Antony Lee
5bcaaa0423
Add a std::filesystem::path <-> os.PathLike caster. (#2730) 2021-07-02 07:00:50 -07:00
Ralf W. Grosse-Kunstleve
9ae7f87fb6 Merge branch 'master' into smart_holder 2021-06-30 23:39:32 -07:00
cyy
f067deb563
avoid unnecessary strlen (#3058) 2021-06-30 23:35:25 -07:00
jonathan-conder-sm
733f8de24f
Avoid string copy if possible when passing a Python object to std::ostream (#3042) 2021-06-30 22:19:14 -07:00
Ralf W. Grosse-Kunstleve
c2111fd353 Merge branch 'master' into smart_holder 2021-06-30 12:36:27 -07:00
Ralf W. Grosse-Kunstleve
fbae8f313b
pickle setstate: setattr __dict__ only if not empty (#2972)
* pickle setstate: setattr __dict__ only if not empty, to not force use of py::dynamic_attr() unnecessarily.

* Adding unit test.

* Clang 3.6 & 3.7 compatibility.

* PyPy compatibility.

* Minor iwyu fix, additional comment.

* Addressing reviewer requests.

* Applying clang-tidy suggested fixes.

* Adding check_dynamic_cast_SimpleCppDerived, related to issue #3062.
2021-06-30 12:34:32 -07:00
Ralf W. Grosse-Kunstleve
93169cc907 Small reduction in code complexity. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
f128f1b6db Converting C assert to pybind11_fail (to play safe). 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
a021e045a9 Adding test_multiple_registered_instances_for_same_pointee_leak. Subtle changes in smart_holder_type_caster_load, trying to work on weak_ptr for shared_ptr_trampoline_self_life_support, but that didn't work out. Manually fully leak-checked again. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
e2108546e1 Adding unit tests: 2 x test_std_make_shared_factory
Completes unit test coverage for the changed code in smart_holder_type_casters.h.
2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
1b752f56c1 Adding unit test: test_multiple_registered_instances_for_same_pointee 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
cb548bb3cc This change fixes the 6 unit tests in
bbfb0259b5/open_spiel/python/mfg/algorithms
    best_response_value_test
    distribution_test
    fictitious_play_test
    greedy_policy_test
    nash_conv_test
    policy_value_test

CAVEAT: The fix is NOT covered by pybind11 unit tests.
2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
9fce2956bc A couple more enhancements based on feedback by @laramiel. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
64716cc14c Adding a few comments after review by @laramiel. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
ab3c5134ad Cleaning out debug code. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
146a925e4e Resolving TODOs for from_unique_ptr void_cast_raw_ptr. Adding test to exercise the path through cast. The path through init.h is missing a test that would fail if the flag is incorrect. The plan is to systematically cover all situations (there are many that are not exercised for shared_from_this). 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
a0e19bdc46 Use casting to void * to evade to shared_from_this mechanism only if pointee_depends_on_holder_owner, but currently only for from_raw_ptr_take_ownership. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
1b9f85a09e Preparation for being smarter about casting to void * to evade to shared_from_this mechanism. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
48eb78ae77 Simpler and safe implementation based on new requirement: C++ (outside of the Python object) needs to hold a shared_ptr before shared_from_this is called. This is more similar to the existing implementation on current smart_holder HEAD, but still uses a weak_ptr to always return the same shared_ptr as long as C++ does not let it expire. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
3dd89f14df smart_holder_poc.h: type-erase raw_ptr before passing to shared_ptr::reset, to not trigger populating the shared_from_this weak_ptr. This way the only way the weak_ptr is populated is through loaded_as_shared_ptr. Breaks all but one test in test_class_sh_trampoline_shared_from_this.py, now marked skip WIP to test everything else with the GitHub CI. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
adfd3e1700 Partial cleanup of tests. WIP. The cleanup uncovered a major problem. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
bfd4c4893e Leveraging new noop_deleter_acting_as_weak_ptr_owner to retrieve released vptr.
The placeholder `vptr` is never exposed anymore, therefore the externally visible `use_count`s are more intuitive.
2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
4b872febcc Adding test_pass_released_shared_ptr_as_unique_ptr, exercising new guard in smart_holder_type_casters.h. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
223283295f Two minor platform-specific fixes. Using static_cast instead of reinterpret_cast. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
993613d9bf Trying again, to get around unused parameter warnings-as-erros. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
20ef96c87d Disabling debugging call of weak_from_this for C++ < 17. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
bf8d6a2900 First fully successful attempt to make shared_from_this and trampolines play nicely.
Now also passes the open_spiel iterated_prisoners_dilemma_test ASAN clean, in addition to all pybind11 and PyCLIF unit tests.

The problem was that calling `std::shared_ptr<void>::reset()` with a `void` pointer cannot possibly update the `shared_from_this` `weak_ptr`.

The solution is to store a `shd_ptr_reset` function pointer in `guarded_deleter` (similar in idea to the stored function pointer for calling `delete`).

This commit still includes all debugging code, i.e. is "dirty". The code will be cleaned up after the GitHub CI is fully successful.
2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
dcf8d0762f First attempt to make shared_from_this and trampolines play nicely. Passes all pybind11 and PyCLIF unit tests ASAN clean, but not the open_spiel iterated_prisoners_dilemma_test. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
bc21158082 Fixing git rebase -X theirs accident. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
4ab4f36a92 Fixing silly oversight (discovered while creating PR #3041). 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
cd5fbc56db Replacing virtual guarded_operator_call with non-virtual guarded_delete. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
1e6cc9dd69 Adding back explicit but default copy constructor, to keep some older compilers happy. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
275aaf977a Inserting const_cast for std::get_deleter return, to keep Ubuntu 20 GCC 6.3.0 happy. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
b04a70b5cc Fixing oversight (clang-tidy error). 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
362e64e1ca WIP snapshot: replacing std::shared_ptr<bool> flag_ptr with simple bool armed_flag. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
459301d9a8 WIP snapshot: std::get_deleter experiment. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
e80a1f0617 WIP snapshot. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
eae174b491 Revert "Experiment: effectively undoing all shared_from_this modifications."
This reverts commit d72d54ebb0b7784f5616edc02910dbd9cce0b2a4.
2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
a6abb7cff1 Revert "Experiment: undoing even more."
This reverts commit 59bc2e183e7aef5e45c06aed6965de0ac52d7b06.
2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
5f92b4ff1c Revert "Experiment: restoring original smart_holder_type_casters.h from smart_holder branch."
This reverts commit 19c5a3613fee71878ba2af0339eed325a5916089.
2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
2ae3c2ceb7 Experiment: restoring original smart_holder_type_casters.h from smart_holder branch. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
9da1e81590 Experiment: undoing even more. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
715ceb4bf3 Experiment: effectively undoing all shared_from_this modifications. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
05bd93543b Fully emulating type_caster_base-related behavior: trying shared_from_this also for unowned pointees. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
775873d0b6 Adding from_raw_pointer_take_ownership_or_shared_from_this(). 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
2a265860a7 enable_shared_from_this_from_raw_ptr_take_ownership_guard: better static_assert that also triggers for derived classes. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
24c223ad8e static_assert in from_raw_ptr_take_ownership, to be tested. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
7a74bfede7 Restoring init_holder overload for std::enable_shared_from_this and original tests/test_smart_ptr.py. 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
94523e8a02 Experiments: 1. disabling enable_shared_from_this, 2. using smart_holder in test_class_sh_shared_from_this.cpp 2021-06-30 07:04:31 -07:00
Ralf W. Grosse-Kunstleve
bcad852f6b Pure clang-format fixes (minor accident in PR #3039). 2021-06-29 16:16:00 -07:00
Jakob Lykke Andersen
7312e624b2 SH, improve error message from shared_ptr cast policy check 2021-06-29 05:57:32 -07:00
Jakob Lykke Andersen
be60fc52a4 Allow move policy in smart holder caster for shared_ptr 2021-06-29 05:57:32 -07:00
Jakob Lykke Andersen
c807807c55 Allow copy policy in smart holder caster for shared_ptr 2021-06-29 05:57:32 -07:00
Ralf W. Grosse-Kunstleve
68b6f8c612 Tracking change in type_caster_base.h on master (PR #3059). 2021-06-25 21:57:45 -07:00
Cris Luengo
57a36633c4 fix: enable py::implicitly_convertible<py::none, ...> for py::class_-wrapped types (#3059)
* Allow casting from None to a custom object, closes #2778

* ci.yml patch from the smart_holder branch for full CI coverage.
2021-06-25 21:57:45 -07:00
Cris Luengo
93e69191c1
fix: enable py::implicitly_convertible<py::none, ...> for py::class_-wrapped types (#3059)
* Allow casting from None to a custom object, closes #2778

* ci.yml patch from the smart_holder branch for full CI coverage.
2021-06-25 17:56:17 -07:00
Ralf W. Grosse-Kunstleve
898d5b301c Manually fixing merge conflict. 2021-06-22 12:19:40 -07:00
Aaron Gokaslan
dac74ebdf5
fix(clang-tidy): performance fixes applied in tests and CI (#3051)
* Initial fixes

* Whoops

* Finish clang-tidy manual fixes

* Add two missing fixes

* Revert

* Update clang-tidy

* Try to fix unreachable code error

* Move nolint comment

* Apply missing fix

* Don't override clang-tidy config

* Does this fix clang-tidy?

* Make all clang-tidy errors visible

* Add comments about NOLINTs and remove a few

* Fix typo
2021-06-22 12:11:54 -04:00
Ralf W. Grosse-Kunstleve
8d1e0b3903
[smart_holder] clang-tidy fixes (related to recent clang-tidy changes on master). (#3053)
* clang-tidy fixes (related to recent clang-tidy changes on master).

* More clang-tidy fixes.
2021-06-21 12:40:10 -07:00
Ralf W. Grosse-Kunstleve
274b014578 Merge branch 'master' into smart_holder 2021-06-21 07:51:19 -07:00
Aaron Gokaslan
3b30b0a51e
fix(clang-tidy): clang-tidy readability and misc fixes, like adding const (#3052)
* Enable and apply clang-tidy readability and misc fixes.

* Revert deprecated tester

* add space to tests/test_constants_and_functions.cpp
2021-06-21 10:37:48 -04:00
Ralf W. Grosse-Kunstleve
dca304f29e Merge branch 'master' into smart_holder 2021-06-19 10:55:20 -07:00
Aaron Gokaslan
af6218ff78
fix(clang-tidy): Apply performance fixes from clang-tidy (#3046)
* Apply performance fixes from clang-tidy

* 2nd Round of Perf Optimizations

* 3rd round of fixes & handle false-positive

* Apply missing fix and clang-format

* Apply reviewer comment
2021-06-19 10:53:27 -07:00
Aaron Gokaslan
c44b41e7c6
[SmartHolder] fix(clang-tidy): apply clang-tidy performance fixes (#3048)
* Apply clang-tidy performance fixes

* Fix bug introduced by double insert

* Revert all non-smart-holder changes
2021-06-18 12:43:31 -07:00
Ralf W. Grosse-Kunstleve
840eb84aff
Removing std::get_deleter const_cast to retest because the code has changed significantly. (#3045) 2021-06-17 13:13:21 -07:00
Ralf W. Grosse-Kunstleve
4f61912646
py::smart_holder std::shared_ptr deleter simplification & optimization. (#3041) 2021-06-16 17:47:22 -07:00
Ralf W. Grosse-Kunstleve
a6b2aadf45 Merge branch 'smart_holder' of https://github.com/pybind/pybind11 into smart_holder 2021-06-08 12:15:34 -07:00
Ralf W. Grosse-Kunstleve
48c7a3a68f Merge branch 'master' into smart_holder 2021-06-08 12:05:19 -07:00
Jack S. Hale
4c7697dbe9
Add const T to docstring generation. (#3020)
* Add const T to docstring generation.

* Change order.

* See if existing test triggers for a const type.

* Add tests.

* Fix test.

* Remove experiment.

* Reformat.

* More tests, checks run.

* Adding `test_fmt_desc_` prefix to new test functions.

* Using pytest.mark.parametrize to 1. condense test; 2. exercise all functions even if one fails; 3. be less platform-specific (e.g. C++ float is not necessarily float32).

Co-authored-by: Ralf W. Grosse-Kunstleve <rwgk@google.com>
2021-06-08 11:56:45 -07:00
Robert Haschke
91f97ca401
smart_holder fixups (#3012)
* Drop constraints on casting of std::shared_ptr

std::shared_ptrs can be shared across python and C++ by design.

* Correctly report casting error

It is important to return an empty handle.
Simply returning None, would skip the error handling in
simple_collector / unpacking_collector, although a python exception is set.
A function call would then be processed with a (wrong) None argument!

* Return None for nullptr

* Revert "Drop constraints on casting of std::shared_ptr"

This reverts commit 7cf53ae8b4.
2021-05-28 06:35:50 -07:00
Ralf W. Grosse-Kunstleve
2cfc017e2d Merge branch 'master' into smart_holder 2021-05-27 11:30:03 -07:00
Yichen
3ac690b88b
Explicitly export exception types. (#2999)
* Set visibility of exceptions to default.

Co-authored-by: XZiar <czktc2007@gmail.com>

* add test

* update docs

* Skip failed test.
2021-05-27 08:00:18 -07:00
Ralf W. Grosse-Kunstleve
6cca66b276 Merge branch 'master' into smart_holder 2021-05-03 22:15:44 -07:00
Ralf W. Grosse-Kunstleve
bc3cd8a8a8
Splitting out include/pybind11/detail/pragma_warning_block.h (#2988)
* Splitting out include/pybind11/detail/pragma_warning_block.h

* Always including pragma_warning_block.h before common.h (resolved 8 CI failures).
2021-05-03 22:08:04 -07:00
Pieter P
0c93a0f3fc
Fix Unicode support for ostream redirects (#2982)
* Crash when printing Unicode to redirected cout
Add failing tests

* Fix Unicode crashes redirected cout

* pythonbuf::utf8_remainder check end iterator

* Remove trailing whitespace and formatting iostream

* Avoid buffer overflow if ostream redirect races
This doesn't solve the actual race, but at least it now has a much lower
probability of reading past the end of the buffer even when data races
do occur.
2021-05-03 22:04:38 -07:00
Ralf W. Grosse-Kunstleve
7c7c336d6d Merge branch 'master' into smart_holder 2021-04-19 11:32:47 -07:00
Ralf W. Grosse-Kunstleve
99de498b26
Bug fix: adding back !is_alias<Class>(ptr) that were accidentally omitted. (#2958)
* Bug fix: adding back `!is_alias<Class>(ptr)` that were accidentally omitted.

* Introducing PYBIND11_SH_AVL, PYBIND11_SH_DEF macros. Applying PYBIND11_SH_DEF to test_factory_constructors.py to complete test coverage.

* Using PYBIND11_SH_DEF in test_methods_and_attributes.cpp, for more complete test coverage.

* Using PYBIND11_SH_DEF in test_multiple_inheritance.cpp, for more complete test coverage.

* Cleaning up test_classh_mock.cpp.

* Better explanations for PYBIND11_SH_AVL, PYBIND11_SH_DEF.

* Disabling 3.10-dev builds.
2021-04-19 10:54:37 -07:00