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Resolves #105430
- Implement all required pieces of P3168R2
- Leverage existing `wrap_iter` and `bounded_iter` classes to implement
the `optional` regular and hardened iterator type, respectively
- Update documentation to match
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Fixes #104977
Fixes #105035
---------
Co-authored-by: Louis Dionne <ldionne.2@gmail.com>
Co-authored-by: A. Jiang <de34@live.cn>
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Reference Type (#141408)
Fixes #105260
This patch applies the change as a DR to C++20. The rationale is that
the paper is more like a bug fix. It does not introduce new features, it
simply changes an existing behaviour (as a bug fix). MSVC STL DRed this
paper to C++20 as well.
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* Implement "P2441R2 `views::join_with`" (https://wg21.link/P2441R2),
closes #105185
* Implement LWG4074 (https://wg21.link/LWG4074), closes #105346
* Complete implementation of "P2711R1 Making multi-param constructors of
views explicit" (https://wg21.link/P2711R1), closes #105252
* Complete implementation of "P2770R0 Stashing stashing iterators for
proper flattening" (https://wg21.link/P2770R0), closes #105250
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pointer over-alignment (#122603)
Closes #118372
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fixes https://github.com/llvm/llvm-project/issues/105193
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# Overview
As a disclaimer, this is my first PR to LLVM and while I've tried to
ensure I've followed the LLVM and libc++ contributing guidelines,
there's probably a good chance I missed something. If I have, just let
me know and I'll try to correct it as soon as I can.
This PR implements `std::ranges::iota` and
`std::ranges::out_value_result` outlined in
[P2440r1](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2440r1.html).
As outlined in the paper above, I've:
- Implemented `out_value_result` and added to `<algorithm>`
- Added `out_value_result`, `iota_result`, and two overloads of `iota`
to `std::ranges` in `<numeric>`
- Updated the version macro `__cpp_lib_ranges_iota` in `<version>`
I've also added tests for `ranges::iota` and `ranges::out_value_result`.
Lastly, I added those structs to the appropriate module files.
Partially implements #105184
EDIT: Forgot to mention in the original post, thanks to @hawkinsw for
taking a look at a preliminary version of this PR!
# TODOs
- [x] Updating the range [status
doc](https://github.com/jamesETsmith/llvm-project/blob/main/libcxx/docs/Status/RangesMajorFeatures.csv)
- [x] Ensure all comments from https://reviews.llvm.org/D121436 are
addressed here
- [X] EDIT (I'll do this in a separate PR). ~~I'm open to implementing
the rest of P2440r1 (`ranges::shift_left` and `ranges::shift_right`) if
that's ok, I just wanted to get feedback on `ranges::iota` first~~
- [x] I've been having trouble building the modules locally and want to
make sure that's working properly
Closes: #134060
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Co-authored-by: Louis Dionne <ldionne.2@gmail.com>
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to temporary" (#128649)
Implements partially: [P2255R2: A type trait to detect reference binding
to temporary](https://wg21.link/P2255R2)
Issue: https://github.com/llvm/llvm-project/issues/105180
https://eel.is/c++draft/meta.type.synop
https://eel.is/c++draft/meta.unary.prop
Implented type traits:
- [x] `reference_constructs_from_temporary`
- [x] `reference_converts_from_temporary`
Closes #129049
Minor drive-by tweak to `std::is_implicit_lifetime` tests.
---------
Co-authored-by: Hristo Hristov <zingam@outlook.com>
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Completes:
- LWG3359 <chrono> leap second support should allow for negative leap
seconds
- P1361R2 Integration of chrono with text formatting
Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
Fixes: #100432
Fixes: #100014
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Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap
seconds
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fixes https://github.com/llvm/llvm-project/issues/105190
---------
Co-authored-by: Hui Xie <huixie@Mac.broadband>
Co-authored-by: Hui Xie <huixie@Huis-MacBook-Pro.local>
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While implementing this feature and its associated LWG issues it turns
out
- LWG3316 Correctly define epoch for utc_clock / utc_timepoint only
added non-normative wording to the standard.
Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- LWG3359 <chrono> leap second support should allow for negative leap
seconds
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This is a continuation of what's been started in #89178.
As a drive-by, this also changes the PSTL macro to say `EXPERIMENTAL`
instead of `INCOMPLETE`.
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This is a follow-up to #89178. This updates the `<__config_site>`
macros.
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Around half of the tests are based on the tests Arthur O'Dwyer's
original implementation of std::flat_map, with modifications and
removals.
partially implement #105190
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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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Implements P2674R1: https://wg21.link/P2674R1
- https://eel.is/c++draft/type.traits
- https://eel.is/c++draft/meta.type.synop
- https://eel.is/c++draft/meta.unary.prop
- https://eel.is/c++draft/support.limits
- https://eel.is/c++draft/version.syn
Implementation details:
- Uses compiler intrinsic `__builtin_is_implicit_lifetime`:
- https://github.com/llvm/llvm-project/pull/101807
- Tests based on:
-
https://github.com/llvm/llvm-project/blob/d213981c80626698a07b11ce872acba098a863d4/clang/test/SemaCXX/type-traits.cpp#L1989
References:
- Implicit-lifetime
- Implicit-lifetime types [basic.types.general]/9:
https://eel.is/c++draft/basic.types.general
- Implicit-lifetime class [class.prop]/9:
https://eel.is/c++draft/class.prop
- P0593R6 Implicit creation of objects for low-level object
manipulation: https://wg21.link/P0593R6
- P1010R1 Container support for implicit lifetime types:
https://wg21.link/P1010R1
- P0593R6 Implicit creation of objects for low-level object
manipulation: https://wg21.link/P0593R6
Closes: #105259
---------
Co-authored-by: Hristo Hristov <zingam@outlook.com>
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We waited before supporting std::jthread fully because we wanted to
investigate other implementation strategies (in particular one involving
std::mutex). Since then, we did some benchmarking and decided that we
wouldn't be moving forward with std::mutex. Hence, there is no real
reason to punt on making std::jthread & friends non-experimental.
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std::is_virtual_base_of was implemented in https://github.com/llvm/llvm-project/pull/105847
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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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Works towards P0619R4/#99985.
- std::uncaught_exception was not previously deprecated. This patch
deprecates it since C++17 as per N4259. std::uncaught_exceptions is
used instead as libc++ unconditionally provides this function.
- _LIBCPP_ENABLE_CXX20_REMOVED_UNCAUGHT_EXCEPTION restores
std::uncaught_exception.
- As a drive-by, this patch updates the C++20 status page to
explain that D.11 is already done, since it was done in
578d09c1b195d859ca7e62840ff6bb83421a77b5.
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It looks like we've accidentally disabled clang-tidy in the CI. This
re-enables it and fixes the issues accumulated while it was disabled.
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This adds the new std::enable_nonlocking_formatter_optimization trait in
<format>. This trait will be used in std::print to implement the
performance benefits.
Implements parts of
- P3107R5 - Permit an efficient implementation of ``std::print``
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Implementing the Hermite polynomials which are part of C++17's
mathematical special functions. The goal is to get early feedback which
will make implementing the other functions easier. Integration of
functions in chunks (e.g. `std::hermite` at first, then `std::laguerre`,
etc.) might make sense as well (also see note on boost.math below).
I started out from this abandoned merge request:
https://reviews.llvm.org/D58876 .
The C++23 standard defines them in-terms of `/* floating-point type */`
arguments. I have not looked into that.
Note, there is still an ongoing discussion on discourse whether
importing boost.math is an option.
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Implements [P1223R5][] completely.
Includes an implementation of `find_last`, `find_last_if`, and
`find_last_if_not`.
[P1223R5]: https://wg21.link/p1223r5
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(#73618)
Differential Revision: https://reviews.llvm.org/D150525
Implements:
- https://wg21.link/P1132R8 - `out_ptr` - a scalable output pointer
abstraction
- https://eel.is/c++draft/smartptr.adapt - 20.3.4 Smart pointer adaptors
- https://wg21.link/LWG3734 - Inconsistency in `inout_ptr` and `out_ptr`
for empty case
- https://wg21.link/LWG3897- `inout_ptr` will not update raw pointer to
0
---------
Co-authored-by: Hristo Hristov <zingam@outlook.com>
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41f7bb9975bcaffae0267fa87b63c90b83ffd551 claimed it implemented this
change but the code was not adjusted. The other spaceship operators in
the calendar code have been validated too.
Implements parts of
- P1614R2 The Mothership has Landed
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Implements parts of:
- P0355 Extending to chrono Calendars and Time Zones
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This implements the class, its non-templated constructors and its
getters to verify the construction.
Completes
- LWG3224 zoned_time constructor from TimeZonePtr does not specify
initialization of tp_
Implements parts of:
- P0355 Extending chrono to Calendars and Time Zones
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Implements parts of:
- P0355 Extending chrono to Calendars and Time Zones
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This implements the overload with the choose argument and adds this
enum.
Implements parts of:
- P0355 Extending chrono to Calendars and Time Zones
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This implements the throwing overload and the exception classes throw by
this overload.
Implements parts of:
- P0355 Extending chrono to Calendars and Time Zones
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This patch reverts 9b832b72 (#87111):
- [libc++] Deprecated `shared_ptr` Atomic Access APIs as per P0718R2
- [libc++] Implemented P2869R3: Remove Deprecated `shared_ptr` Atomic Access APIs from C++26
As explained in [1], the suggested replacement in P2869R3 is `__cpp_lib_atomic_shared_ptr`,
which libc++ does not yet implement. Let's not deprecate the old way of doing things before
the new way of doing things exists.
[1]: https://github.com/llvm/llvm-project/pull/87111#issuecomment-2112740039
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Implement the std::atomic_ref class template by reusing atomic_base_impl.
Based on the work from https://reviews.llvm.org/D72240
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The patch does several things:
- fixes module exports
- disables clang-tidy with Clang-17 due to known issues
- disabled clang-tidy on older libstdc++ versions since it lacks C++20
features used
- fixes the CMake dependency
The issue why clang-tidy was not used in the CI was the last issue; the
plugin was not a
dependency of the tests. Without a plugin the tests disable clang-tidy.
This was noticed while investigating
https://github.com/llvm/llvm-project/issues/89898
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This attribute is used in the headers. Not using this in the modules has
led to several issues. Add them to the modules to avoid these errors in
other placed.
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This was omitted in c1086532d4d5 and not detected by the CI since
clang-tidy is not running. This fixes the exports.
Fixes: https://github.com/llvm/llvm-project/issues/89898
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This patch exports the `std::ranges::range_adaptor_closure` class
template implemented in #89148 from the C++ Modules file.
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This adds the local_info type and its formatting options.
The usage of the local_info object will be done in separate patches.
Implements parts of:
- P0355 Extending to Calendars and Time Zones
- P1361 Integration of chrono with text formatting
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Implemented P2869R3: Remove Deprecated `shared_ptr` Atomic Access APIs from C++26 (#87111)
Implements https://wg21.link/P2869R4
Implements deprecations as per https://wg21.link/P0718R2
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Adds the sys_info class and time_zone::get_info(). The code still has a
few quirks and has not been optimized for performance yet.
The returned sys_info is compared against the output of the zdump tool
in the test giving confidence the implementation is correct.
Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
Implements:
- LWGXXXX The sys_info range should be affected by save
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Implement `std::bind_back` function from P2387R3 "Pipe support for
user-defined range adaptors".
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Implements: https://wg21.link/P2872R3
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It adds the missing member functions of the tzdb class and adds the free
functions that use these member functions.
Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
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Implements: https://wg21.link/P2867R2
---------
Co-authored-by: Hristo Hristov <zingam@outlook.com>
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This implements the loading of the leap-seconds.list file and store its
contents in the tzdb struct.
This adds the required `leap_seconds` member.
The class leap_seconds is fully implemented including its non-member
functions.
Implements parts of:
- P0355 Extending <chrono> to Calendars and Time Zones
- P1614 The Mothership has Landed
Implements:
- P1981 Rename leap to leap_second
- LWG3359 <chrono> leap second support should allow for negative leap
seconds
- LWG3383 §[time.zone.leap.nonmembers] sys_seconds should be replaced
with seconds
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We only define the classes in `<syncstream>` when experimental library
features are enabled, but we would forward-declare them in `<iosfwd>`
even when they are disabled. This led to confusing error messages about
being unable to instantiate an undefined template.
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Otherwise modules.std-module.sh.cpp test fails with following error:
error: no member named 'atomic_signed_lock_free' in namespace 'std'
when the types are not available.
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Implements: P2819R2 <https://wg21.link/P2819R2>
- https://eel.is/c++draft/utilities#concept:tuple-like
- https://eel.is/c++draft/complex.syn
- https://eel.is/c++draft/complex.tuple
---------
Co-authored-by: Zingam <zingam@outlook.com>
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