[libc++] Implement std::not_fn<NTTP> (#86133)

Implement `std::not_fn<NTTP>` from "P2714R1 Bind front and back to NTTP callables".

[libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)

This patch implements the forwarding to frozen C++03 headers as
discussed in
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-

[libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)

This patch implements the forwarding to frozen C++03 headers as
discussed in
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. In the
RFC, we initially proposed selecting the right headers from the Clang
driver, however consensus seemed to steer towards handling this in the
library itself. This patch implements that direction.

At a high level, the changes basically amount to making each public
header look like this:

```
// inside <vector>
#ifdef _LIBCPP_CXX03_LANG
# include <__cxx03/vector>
#else
// normal <vector> content
#endif
```

In most cases, public headers are simple umbrella headers so there isn't
much code in the #else branch. In other cases, the #else branch contains
the actual implementation of the header.

show more ...

[libc++] Add #if 0 block to all the top-level headers (#119234)

Including The frozen C++03 headers results in a lot of formatting
changes in the main headers, so this splits these changes into a
sep

[libc++] Add #if 0 block to all the top-level headers (#119234)

Including The frozen C++03 headers results in a lot of formatting
changes in the main headers, so this splits these changes into a
separate commit instead.

This is part of
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc.

show more ...

[libc++] Granularize <vector> (#99705)

| | old time | new time |
| ------------------ | -------- | -------- |
| functional - c++23 | 416ms | 225ms |
| random - c++23

[libc++] Granularize <vector> (#99705)

| | old time | new time |
| ------------------ | -------- | -------- |
| functional - c++23 | 416ms | 225ms |
| random - c++23 | 513ms | 392ms |
| vector - c++17 | 206ms | 100ms |

show more ...

[libc++] Fix expression-equivalence for `mem_fn` (#111307)

Previously, SFINAE constraints and exception specification propagation
were missing in the return type of libc++'s `std::mem_fn`. The
req

[libc++] Fix expression-equivalence for `mem_fn` (#111307)

Previously, SFINAE constraints and exception specification propagation
were missing in the return type of libc++'s `std::mem_fn`. The
requirements on expression-equivalence (or even plain "equivalent" in
pre-C++20 specification) in [func.memfn] are actually requiring them.

This PR adds the missed stuffs. Fixes #86043.

Drive-by changes:
- removing no longer used `__invoke_return`,
- updating synopsis comments in several files, and
- merging several test files for `mem_fn` into one.

show more ...

[libc++] Include the rest of the detail headers by version in the umbrella headers (#96032)

This is a follow-up to #83740.

[libc++][functional] P2944R3 (partial): Comparisons for `reference_wrapper` (`reference_wrapper` operators only) (#88384)

Implements https://wg21.link/P2944R3 (partially)
Implements https://wg21.li

[libc++][functional] P2944R3 (partial): Comparisons for `reference_wrapper` (`reference_wrapper` operators only) (#88384)

Implements https://wg21.link/P2944R3 (partially)
Implements https://wg21.link/LWG4071 /
https://cplusplus.github.io/LWG/issue4071 (fixes build failures in the
test suite)
- https://eel.is/c++draft/refwrap.comparisons

show more ...

[libc++] Implement `bind_back` (#81055)

Implement `std::bind_back` function from P2387R3 "Pipe support for
user-defined range adaptors".

[libc++] Clean up includes of <__assert> (#80091)

Originally, we used __libcpp_verbose_abort to handle assertion failures.
That function was declared from all public headers. Since we don't use
th

[libc++] Clean up includes of <__assert> (#80091)

Originally, we used __libcpp_verbose_abort to handle assertion failures.
That function was declared from all public headers. Since we don't use
that mechanism anymore, we don't need to declare __libcpp_verbose_abort
from all public headers, and we can clean up a lot of unnecessary
includes.

This patch also moves the definition of the various assertion categories
to the <__assert> header, since we now rely on regular IWYU for these
assertion macros.

rdar://105510916

show more ...

[libc++] Remove a few transitive includes (#70553)

[libc++][NFC] Fix typo in synopsis comment

[libc++] Remove the legacy debug mode.

See https://discourse.llvm.org/t/rfc-removing-the-legacy-debug-mode-from-libc/71026

Reviewed By: #libc, Mordante, ldionne

Differential Revision: https://revi

[libc++] Remove the legacy debug mode.

See https://discourse.llvm.org/t/rfc-removing-the-legacy-debug-mode-from-libc/71026

Reviewed By: #libc, Mordante, ldionne

Differential Revision: https://reviews.llvm.org/D153672

show more ...

[libc++][spaceship] P1614R2: Removed `operator!=` from `functional`

Implements parts of P1614R2:
- Removed `operator!=` from `functional`

Reviewed By: #libc, Mordante

Differential Revision: https:

[libc++][spaceship] P1614R2: Removed `operator!=` from `functional`

Implements parts of P1614R2:
- Removed `operator!=` from `functional`

Reviewed By: #libc, Mordante

Differential Revision: https://reviews.llvm.org/D152704

show more ...

[libc++] Moves unwrap_reference to type_traits.

This was discovered while working on modules.

Reviewed By: #libc, philnik

Differential Revision: https://reviews.llvm.org/D149351

[libc++] Remove <cstdlib> includes

We changed the `abort` calls when trying to throw exceptions in `-fno-exceptions` mode to `__verbose_abort` calls, which removes the dependency in most files.

Rev

[libc++] Remove <cstdlib> includes

We changed the `abort` calls when trying to throw exceptions in `-fno-exceptions` mode to `__verbose_abort` calls, which removes the dependency in most files.

Reviewed By: ldionne, #libc

Spies: dim, emaste, mikhail.ramalho, smeenai, libcxx-commits

Differential Revision: https://reviews.llvm.org/D146076

show more ...

[libc++] Granularize <exception> includes

Reviewed By: ldionne, #libc

Spies: mikhail.ramalho, smeenai, libcxx-commits

Differential Revision: https://reviews.llvm.org/D146097

[libc++] Granularize <atomic> includes

Reviewed By: ldionne, Mordante, #libc

Spies: arichardson, libcxx-commits

Differential Revision: https://reviews.llvm.org/D144255

[libc++] Granularize <type_traits> includes

Reviewed By: ldionne, #libc, #libc_abi

Spies: #libc_vendors, smeenai, libcxx-commits

Differential Revision: https://reviews.llvm.org/D145320

[libc++] Improves clang-format settings.

Add a new test based .clang-format file which inherits from the generic
one. This moves some test specific formatting rules to the test
directory.

The main

[libc++] Improves clang-format settings.

Add a new test based .clang-format file which inherits from the generic
one. This moves some test specific formatting rules to the test
directory.

The main benefit is that headers are sorted, which makes it more likely
to catch these errors before creating a review instead of spotting the
error in the CI clang-tidy step.

Reviewed By: ldionne, philnik, #libc

Differential Revision: https://reviews.llvm.org/D144755

show more ...

[libc++][NFC] Remove TODOs that are already done

[libc++] Implement P2136R3 std::invoke_r

Differential Revision: https://reviews.llvm.org/D143610

[libc++] Addresses LWG3764.

LWG3764 reference_wrapper::operator() should propagate noexcept

As drive-by adds constexpr to the synopsis, since it has already been
implemented.

Reviewed By: #libc,

[libc++] Addresses LWG3764.

LWG3764 reference_wrapper::operator() should propagate noexcept

As drive-by adds constexpr to the synopsis, since it has already been
implemented.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D142814

show more ...

[libc++] Granularize <concept> includes

Reviewed By: ldionne, #libc

Spies: libcxx-commits

Differential Revision: https://reviews.llvm.org/D137283

[libc++] Avoid including <tuple> in compressed_pair.h

compressed_pair is widely used in the library, but most of the uses don't use the tuple parts. To avoid including <tuple> everywhere, use the fo

[libc++] Avoid including <tuple> in compressed_pair.h

compressed_pair is widely used in the library, but most of the uses don't use the tuple parts. To avoid including <tuple> everywhere, use the forward declaration instead in compressed_pair.h

Reviewed By: ldionne, #libc

Spies: libcxx-commits

Differential Revision: https://reviews.llvm.org/D133331

show more ...

[libc++] Granularize the rest of memory

Reviewed By: ldionne, #libc

Spies: vitalybuka, paulkirth, libcxx-commits, mgorny

Differential Revision: https://reviews.llvm.org/D132790