## Introduction
This patch implements LWG3564:
`transform_view::iterator<true>::value_type` and `iterator_category`
should use `const F&`.
`transform_view`'s iterator currently obtained from a `const
transform_view` invoke the transformation function as `const`, but the
`value_type` and `iterator_category` determination uses non-`const`
`F&`.
## Reference
-
[[range.transform.iterator]](https://eel.is/c++draft/range.transform.iterator)
- [LWG3564](https://cplusplus.github.io/LWG/issue3564)
This adds addressof at the required places in [input.output]. Some of
the new tests failed since string used operator& internally. These have
been fixed too.
Note the new fstream tests perform output to a basic_string instead of a
double. Using a double requires num_get specialization
num_get<CharT, istreambuf_iterator<CharT,
char_traits_operator_hijacker<CharT>>
This facet is not present in the locale database so the conversion would
fail due to a missing locale facet. Using basic_string avoids using the
locale.
As a drive-by fixes several bugs in the ofstream.cons tests. These
tested ifstream instead of ofstream with an open mode.
Implements:
- LWG3130 [input.output] needs many addressof
Closes#100246.
The tests kept being based on std::string instead of std::string_view to
allow testing with older C++ dialects.
Adds tests for:
- LWG3112 system_error and filesystem_error constructors taking a string
may not be able to meet their postconditions
- Update note for P0156 which was reverted in Kona, to avoid unusual status.
- Add the LWG issue number for an old C++14 NB comment.
- Fix broken link for LWG2118
- Capitalize paper numbers and links consistently
- Remove weird status '* *' which was likely added by mistake
- Make sure we always have the same number of entries. In particular, I
dropped the "Group" entry that was tracked for papers but not for LWG
issues, since I don't think that added much. The group is already
tracked on the paper itself.
- Add "Label" row to all the CSV files.
This is mechanical, but it's necessary if we want to process our CSV
files uniformly, for example to synchronize their state with Github
issues.
There were a few places where we didn't properly quote entries in the
CSV status pages, or where we followed inconsistent spacing. This causes
issue when trying to synchronize status pages with Github issues.
As mentioned in the LWG issue libc++ has already implemented the
optimization. This adds tests and documents the implementation defined
behaviour.
Drive-by fixes an initialization.
The polymorphic_allocator was added in C++17.
This issue was filed in 2022 so well after C++20. This issue adds an
operator==.
Starting with C++20 this adds a compiler generated operator!=. To have
the same behaviour in C++17 and C++20 (and later) a manual operator!= is
defined in C++17.
Implements
- LWG3683 operator== for polymorphic_allocator cannot deduce template
argument in common cases
- LWG3147 Definitions of "likely" and "unlikely" are likely to cause
problems Adjusts the requirements on programs using the Standard
library.
- LWG3328 Clarify that std::string is not good for UTF-8 Adds a
non-normative note, aimed at users of the Standard library.
- LWG3784 std.compat should not provide ::byte and its friends was
implemented during modules.
- LWG3062 Unnecessary decay_t in is_execution_policy_v should be
remove_cvref_t Was implemented while implementing parallel algorithms.
- LWG3362 Strike stop_source's operator!= The removed operator was never
implemented.
- LWG3616 LWG 3498 seems to miss the non-member swap for basic_syncbuf
This was implemented correctly from the start.
- LWG3199 istream >> bitset<0> fails This was implemented in
fc4486c2472b84384d4a31d2436a91bdb9b29792, might be in LLVM-9
- LWG3828 Sync intmax_t and uintmax_t with C2x Standardardized existing
practice.
- LWG3713 Sorted with respect to comparator (only) Wording issue in the
Standard.
- LWG3823 Unnecessary precondition for is_aggregate Changes the
preconditions
- LWG3826 Redundant specification [for overload of yield_value] Changes
a remark to a note
- LWG3203 span element access invalidation Update wording relevant for
users of the Standard library.
This implements the requirements for the container iterator requirements
for array, deque, vector, and `vector<bool>`.
Implements:
- LWG3352 strong_equality isn't a thing
Implements parts of:
- P1614R2 The Mothership has Landed
Fixes: https://github.com/llvm/llvm-project/issues/62486
The work was done in a8ae392718313e64e2d7bc092b00f51476c074b2 which
implements parts of
N4258: Cleaning-up noexcept in the Library
However that's paper Summary of Proposed Changes contains
No change in vector<bool>
This patch updates the status and as a few NFC cleanups. The fixed
version is based on the release page and might be off.
Updates
- LWG3778 vector<bool> missing exception specifications
## Introduction
This patch implements LWG3618: Unnecessary `iter_move` for
`transform_view::iterator`.
`transform_view`'s iterator currently specifies a customization point
for `iter_move`. This customization point does the same thing that the
default implementation would do, but its sole purpose is to ensure the
appropriate conditional `noexcept` specification.
## Reference
-
[[range.transform.iterator]](https://eel.is/c++draft/range.transform.iterator)
- [LWG3618](https://cplusplus.github.io/LWG/issue3618)
Implements parts of:
- P0355 Extending to chrono Calendars and Time Zones
- P1361 Integration of chrono with text formatting
- P2372 Fixing locale handling in chrono formatters
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.
Implements [P1223R5][] completely.
Includes an implementation of `find_last`, `find_last_if`, and
`find_last_if_not`.
[P1223R5]: https://wg21.link/p1223r5
This patch implements P2389R2, which was adopted at the St. Louis meeting.
It builds upon previous enhancements from P2299R3, which introduced deduction
guides and the `dextents` alias template.
Completes
- LWG3232 Inconsistency in zoned_time deduction guides
- LWG3294 zoned_time deduction guides misinterprets stringchar*
Implements parts of:
- P0355 Extending to chrono Calendars and Time Zones
Completes
- LWG3225 zoned_time converting constructor shall not be noexcept
- LWG3226 zoned_time constructor from string_view should accept
zoned_time<Duration2, TimeZonePtr2>
Implements parts of:
- P0355 Extending to chrono Calendars and Time Zones
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
See [LWG4061](https://cplusplus.github.io/LWG/issue4061) and
[P3341R0](https://wg21.link/p3341r0). Effectively reverts commit
36ce0c3b1e581ca310ae7d0cbc6af002cc5d0251.
`libcxx/test/std/utilities/format/format.functions/bug_81590.compile.pass.cpp`
has a `format` function that unexpectedly takes the
`basic_format_context` by value, which is made ill-formed by LWG4061.
This PR changes the function to take the context by reference.
See [LWG4106](https://cplusplus.github.io/LWG/issue4106) and
[P3341R0](https://wg21.link/p3341r0).
The test coverage for the empty state of `basic_format_args` in
`get.pass.cpp` is to be completely removed, because the
non-default-constructibility is covered in `ctor.pass.cpp`.
While implementing the UTC clock it turns out that the implementation of
the leap seconds was not correct, it should store the individual value,
not the sum.
It also looks like LWG3359 has not been fully implemented.
Implements parts of:
- LWG3359 <chrono> leap second support should allow for negative leap
seconds
Try it again. Use the approach suggested by Tim in the LWG thread :
using function default argument SFINAE
- Revert "[libc++] Revert LWG3233 Broken requirements for shared_ptr
converting constructors (#93071)"
- Revert "[libc++] Revert temporary attempt to implement LWG 4110
(#95263)"
- test for default_delete
- Revert "Revert "[libc++] Revert temporary attempt to implement LWG
4110 (#95263)""
- test for NULL
This reverts commit d868f0970, which was shown to break some code and we
don't know yet whether the code should be valid or not. Reverting until
we've had time to figure it out next week.
When I filed LWG4110 after the discussion in #93071, I thought it was
going to be a straightforward fix. It turns out that it isn't, so we
should stay in the state where libc++ is Standards conforming even if
that state leads to some reasonable code being rejected by the library.
Once WG21 figures out what to do with this issue and votes on it, we'll
implement it through our normal means.
This reverts f638f7b6a7c2 and 16f2aa1a2ddf.
The feature has been implemented in LLVM 18 as an experimental feature.
This marks the paper as complete and sets the feature-test macro.
Implements
- P2465R3 Standard Library Modules std and std.compat
Fixes: https://github.com/llvm/llvm-project/issues/89579
