[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++] Granularize <new> includes (#119964)

[libc++] Remove <stddef.h> includes from the granularized <cstddef> headers (#114788)

We can define some of these aliases without having to include the system
<stddef.h> and there doesn't seem to be

[libc++] Remove <stddef.h> includes from the granularized <cstddef> headers (#114788)

We can define some of these aliases without having to include the system
<stddef.h> and there doesn't seem to be much of a reason we shouldn't do
it this way.

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[libc++] Granularize <cstddef> includes (#108696)

[libc++][RFC] Always define internal feature test macros (#89178)

Currently, the library-internal feature test macros are only defined if
the feature is not available, and always have the prefix
`

[libc++][RFC] Always define internal feature test macros (#89178)

Currently, the library-internal feature test macros are only defined if
the feature is not available, and always have the prefix
`_LIBCPP_HAS_NO_`. This patch changes that, so that they are always
defined and have the prefix `_LIBCPP_HAS_` instead. This changes the
canonical use of these macros to `#if _LIBCPP_HAS_FEATURE`, which means
that using an undefined macro (e.g. due to a missing include) is
diagnosed now. While this is rather unlikely currently, a similar change
in `<__configuration/availability.h>` caught a few bugs. This also
improves readability, since it removes the double-negation of `#ifndef
_LIBCPP_HAS_NO_FEATURE`.

The current patch only touches the macros defined in `<__config>`. If
people are happy with this approach, I'll make a follow-up PR to also
change the macros defined in `<__config_site>`.

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[libc++][NFC] Replace _LIBCPP_NORETURN and TEST_NORETURN with [[noreturn]] (#80455)

`[[__noreturn__]]` is now always available, so we can simply use the
attribute directly instead of through a macr

[libc++][NFC] Replace _LIBCPP_NORETURN and TEST_NORETURN with [[noreturn]] (#80455)

`[[__noreturn__]]` is now always available, so we can simply use the
attribute directly instead of through a macro.

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[libc++][NFC] Run clang-format on libcxx/include again (#95874)

As time went by, a few files have become mis-formatted w.r.t.
clang-format. This was made worse by the fact that formatting was not

[libc++][NFC] Run clang-format on libcxx/include again (#95874)

As time went by, a few files have become mis-formatted w.r.t.
clang-format. This was made worse by the fact that formatting was not
being enforced in extensionless headers. This commit simply brings all
of libcxx/include in-line with clang-format again.

We might have to do this from time to time as we update our clang-format
version, but frankly this is really low effort now that we've formatted
everything once.

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[libc++] Mark more types as trivially relocatable (#89724)

Co-authored-by: Louis Dionne <ldionne.2@gmail.com>

[libc++] Make the __availability header a sub-header of __config (#93083)

In essence, this header has always been related to configuration of
the library but we didn't want to put it inside <__conf

[libc++] Make the __availability header a sub-header of __config (#93083)

In essence, this header has always been related to configuration of
the library but we didn't want to put it inside <__config> due to
complexity reasons. Now that we have sub-headers in <__config>, we
can move <__availability> to it and stop including it everywhere since
we already obtain the required macros via <__config>.

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[WebAssembly] Upstream misc. EH changes (#92990)

This upstreams more recent, mostly EH changes from libcxx and libcxxabi:
- `__cxa_init_primary_exception`-related changes made when updating to
LLV

[WebAssembly] Upstream misc. EH changes (#92990)

This upstreams more recent, mostly EH changes from libcxx and libcxxabi:
- `__cxa_init_primary_exception`-related changes made when updating to
LLVM 18.1.2 (https://github.com/emscripten-core/emscripten/pull/21638)
- Removes ctype macros
(https://github.com/emscripten-core/emscripten/pull/20960)
- Guard destructor changes with `__wasm__`
(https://github.com/emscripten-core/emscripten/pull/21974)

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[libc++] Only forward-declare ABI-functions in exception_ptr.h if they are meant to be used (#84707)

This patch fixes the unconditional forward-declarations of ABI-functions
in exception_ptr.h, and

[libc++] Only forward-declare ABI-functions in exception_ptr.h if they are meant to be used (#84707)

This patch fixes the unconditional forward-declarations of ABI-functions
in exception_ptr.h, and makes it dependent on the availability macro, as
it should've been from the beginning.

The declarations being unconditional break the build with libcxxrt
before 045c52ce8 [1], now they are opt-out.

[1]: https://github.com/libcxxrt/libcxxrt/commit/045c52ce821388f4ae4d119fe4fb75f1eb547b85

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[libc++abi] Implement __cxa_init_primary_exception and use it to optimize std::make_exception_ptr (#65534)

This patch implements __cxa_init_primary_exception, an extension to the
Itanium C++ ABI.

[libc++abi] Implement __cxa_init_primary_exception and use it to optimize std::make_exception_ptr (#65534)

This patch implements __cxa_init_primary_exception, an extension to the
Itanium C++ ABI. This extension is already present in both libsupc++ and
libcxxrt. This patch also starts making use of this function in
std::make_exception_ptr: instead of going through a full throw/catch
cycle, we are now able to initialize an exception directly, thus making
std::make_exception_ptr around 30x faster.

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[libc++] Merge _LIBCPP_FUNC_VIS, _LIBCPP_TYPE_VIS and _LIBCPP_EXCEPTION_ABI into _LIBCPP_EXPORTED_FROM_ABI

These macros are always defined identically, so we can simplify the code a bit by merging t

[libc++] Merge _LIBCPP_FUNC_VIS, _LIBCPP_TYPE_VIS and _LIBCPP_EXCEPTION_ABI into _LIBCPP_EXPORTED_FROM_ABI

These macros are always defined identically, so we can simplify the code a bit by merging them.

Reviewed By: ldionne, #libc

Spies: libcxx-commits, krytarowski, smeenai

Differential Revision: https://reviews.llvm.org/D152652

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[libc++][NFC] Fix whitespace problems in the files added to ignore_format.txt in D151115

Reviewed By: ldionne, #libc, Mordante

Spies: arichardson, Mordante, libcxx-commits

Differential Revision: h

[libc++][NFC] Fix whitespace problems in the files added to ignore_format.txt in D151115

Reviewed By: ldionne, #libc, Mordante

Spies: arichardson, Mordante, libcxx-commits

Differential Revision: https://reviews.llvm.org/D151119

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[libc++] Add missing include in exception_ptr.h

Windows builds were failing due to missing include for std::addressof
after D145095.

Differential revision: https://reviews.llvm.org/D145919

[libc++] Granularize <exception>

This patch also updates the moved code to the new style (i.e. formatted, replaced marcos and typedefs)

Reviewed By: ldionne, #libc

Spies: arichardson, libcxx-commi

[libc++] Granularize <exception>

This patch also updates the moved code to the new style (i.e. formatted, replaced marcos and typedefs)

Reviewed By: ldionne, #libc

Spies: arichardson, libcxx-commits

Differential Revision: https://reviews.llvm.org/D145095

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