[libc++] Put _LIBCPP_NODEBUG on all internal aliases (#118710)

This significantly reduces the amount of debug information generated
for codebases using libc++, without hurting the debugging experie

[libc++] Put _LIBCPP_NODEBUG on all internal aliases (#118710)

This significantly reduces the amount of debug information generated
for codebases using libc++, without hurting the debugging experience.

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[libc++] Refactor the configuration macros to being always defined (#112094)

This is a follow-up to #89178. This updates the `<__config_site>`
macros.

[libc++][NFC] Run clang-format on libcxx/include

This re-formats a few headers that had become out-of-sync with respect
to formatting since we ran clang-format on the whole codebase. There's
surpris

[libc++][NFC] Run clang-format on libcxx/include

This re-formats a few headers that had become out-of-sync with respect
to formatting since we ran clang-format on the whole codebase. There's
surprisingly few instances of it.

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[libc++] Remove <tuple> include from <__format/concepts.h> (#80214)

This also moves `tuple_size_v` into `tuple_size` as a drive-by.

[libc++][NFC] Move __format/format_fwd.h to __fwd/format.h (#84336)

[libc++] Format the code base (#74334)

This patch runs clang-format on all of libcxx/include and libcxx/src, in
accordance with the RFC discussed at [1]. Follow-up patches will format
the benchmar

[libc++] Format the code base (#74334)

This patch runs clang-format on all of libcxx/include and libcxx/src, in
accordance with the RFC discussed at [1]. Follow-up patches will format
the benchmarks, the test suite and remaining parts of the code. I'm
splitting this one into its own patch so the diff is a bit easier to
review.

This patch was generated with:

find libcxx/include libcxx/src -type f \
| grep -v 'module.modulemap.in' \
| grep -v 'CMakeLists.txt' \
| grep -v 'README.txt' \
| grep -v 'libcxx.imp' \
| grep -v '__config_site.in' \
| xargs clang-format -i

A Git merge driver is available in libcxx/utils/clang-format-merge-driver.sh
to help resolve merge and rebase issues across these formatting changes.

[1]: https://discourse.llvm.org/t/rfc-clang-formatting-all-of-libc-once-and-for-all

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[libc++][format] Adds formattable-with concept.

This change has a few additional effects:
- Abstract classes are now formattable.
- Volatile objects are no longer formattable.

Implements
- LWG3631

[libc++][format] Adds formattable-with concept.

This change has a few additional effects:
- Abstract classes are now formattable.
- Volatile objects are no longer formattable.

Implements
- LWG3631 basic_format_arg(T&&) should use remove_cvref_t<T> throughout
- LWG3925 Concept formattable's definition is incorrect

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D152092

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[libc++][format] Fixes invalid usage of m type.

The m type in a range formatter may only be used when a pair or a tuple
with two elements is used. This was not correctly validated as reported
in llv

[libc++][format] Fixes invalid usage of m type.

The m type in a range formatter may only be used when a pair or a tuple
with two elements is used. This was not correctly validated as reported
in llvm.org/PR60995.

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D145309

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[libc++][format] Removes transitive type_traits.

Reviewed By: #libc, philnik

Differential Revision: https://reviews.llvm.org/D144498

[libc++][NFC] Replace _LIBCPP_STD_VER > x with _LIBCPP_STD_VER >= x

This change is almost fully mechanical. The only interesting change is in `generate_feature_test_macro_components.py` to generate

[libc++][NFC] Replace _LIBCPP_STD_VER > x with _LIBCPP_STD_VER >= x

This change is almost fully mechanical. The only interesting change is in `generate_feature_test_macro_components.py` to generate `_LIBCPP_STD_VER >=` instead. To avoid churn in the git-blame this commit should be added to the `.git-blame-ignore-revs` once committed.

Reviewed By: ldionne, var-const, #libc

Spies: jloser, libcxx-commits, arichardson, arphaman, wenlei

Differential Revision: https://reviews.llvm.org/D143962

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[libc++][format] Adds range-default-formatter.

This adds an incomplete version where the specializations for the
format_kinds are disabled dummy formatters.

Implements part of
- P2585R0 Improving d

[libc++][format] Adds range-default-formatter.

This adds an incomplete version where the specializations for the
format_kinds are disabled dummy formatters.

Implements part of
- P2585R0 Improving default container formatting

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D137271

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[libc++][format] Implements formattable concept.

This concept is introduced in P2286, but was implemented in libc++
before. This implementation was used in the library internally. This
implementatio

[libc++][format] Implements formattable concept.

This concept is introduced in P2286, but was implemented in libc++
before. This implementation was used in the library internally. This
implementation lacked the resolution of LWG3636. The original formatter
had a non-const member function that wasn't trivial to make a const
member. The recent parser improvements made this member a const member
in preparation of LWG3636.

Note LWG3636 isn't voted in. Its status is Ready. P2286's concept has
been written as-if LWG3636 is accepted and refers to that LWG issue.

Updates some tests make format a const member function and removes a
tests that's mainly a duplicate of the formattable concept test.

Implements
- LWG3636 formatter<T>::format should be const-qualified

Implements parts of
- P2286R8 Formatting Ranges

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D134110

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[NFC][libc++][format] Renames __char_type concept.

Move the concept to the concepts header and uses a name in the style of
P2286.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews

[NFC][libc++][format] Renames __char_type concept.

Move the concept to the concepts header and uses a name in the style of
P2286.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D131176

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[libc++][format] Adds a formattable concept.

The concept is based on P2286R2 Formatting Ranges. It will be used to
optimise the storage of __format_arg_store as required by LWG-3473.

Depends on D12

[libc++][format] Adds a formattable concept.

The concept is based on P2286R2 Formatting Ranges. It will be used to
optimise the storage of __format_arg_store as required by LWG-3473.

Depends on D120916

Reviewed By: #libc, Mordante

Differential Revision: https://reviews.llvm.org/D120921

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