Commit Graph

19 Commits

Author SHA1 Message Date
Arthur O'Dwyer bfbd73f87d [libc++] Alphabetize and include-what-you-use. NFCI.
Differential Revision: https://reviews.llvm.org/D102781
2021-05-29 19:54:48 -04:00
Arthur O'Dwyer 06b40e80ae [libc++] Alphabetize header inclusions and include-what-you-use <__debug>. NFCI. 2021-05-18 19:56:30 -04:00
Arthur O'Dwyer e130fbe24e [libc++] Some fixes to the <bit> utilities.
Fix __bitop_unsigned_integer and rename to __libcpp_is_unsigned_integer.
There are only five unsigned integer types, so we should just list them out.
Also provide `__libcpp_is_signed_integer`, even though the Standard doesn't
consume that trait anywhere yet.

Notice that `concept uniform_random_bit_generator` is specifically specified
to rely on `concept unsigned_integral` and *not* `__is_unsigned_integer`.
Instantiating `std::ranges::sample` with a type `U` satisfying
`uniform_random_bit_generator` where `unsigned_integral<U::result_type>`
and not `__is_unsigned_integer<U::result_type>` is simply IFNDR.

Orthogonally, fix an undefined behavior in std::countr_zero(__uint128_t).

Orthogonally, improve tests for the <bit> manipulation functions.
It was these new tests that detected the bug in countr_zero.

Differential Revision: https://reviews.llvm.org/D102328
2021-05-18 19:56:30 -04:00
Louis Dionne b51756819a [libc++] Rename include/support to include/__support
We do ship those headers, so the directory name should not be something
that can potentially conflict with user-defined directories.

Differential Revision: https://reviews.llvm.org/D95956
2021-02-04 10:16:33 -05:00
Thorsten Schütt b973e2e2f2 [libc++] Introduce __bits
It has the low-level bit fiddling operations from bit. It eliminates a cyclic dependency between __bit_reference, bits, and vector. I want to exploit this in later patches.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D94908
2021-01-22 21:20:23 +01:00
Arthur O'Dwyer d586f92c94 [libc++] Consistently replace `std::` qualification with `_VSTD::` or nothing. NFCI.
I used a lot of `git grep` to find places where `std::` was being used
outside of comments and assert-messages. There were three outcomes:

- Qualified function calls, e.g. `std::move` becomes `_VSTD::move`.
    This is the most common case.

- Typenames that don't need qualification, e.g. `std::allocator` becomes `allocator`.
    Leaving these as `_VSTD::allocator` would also be fine, but I decided
    that removing the qualification is more consistent with existing practice.

- Names that specifically need un-versioned `std::` qualification,
    or that I wasn't sure about. For example, I didn't touch any code in
    <atomic>, <math.h>, <new>, or any ext/ or experimental/ headers;
    and I didn't touch any instances of `std::type_info`.

In some deduction guides, we were accidentally using `class Alloc = typename std::allocator<T>`,
despite `std::allocator<T>`'s type-ness not being template-dependent.
Because `std::allocator` is a qualified name, this did parse as we intended;
but what we meant was simply `class Alloc = allocator<T>`.

Differential Revision: https://reviews.llvm.org/D92250
2020-12-01 22:13:39 -05:00
Mark de Wever 1a036e9cc8 [libcxx] Implement P1956 rename low-level bit functions
Implements P1956: On the names of low-level bit manipulation functions.

Users may use older versions of libc++ or other standard libraries with the old names. In order to keep compatibility the old functions are kept, but marked as deprecated.

The patch also adds a new config macro `_LIBCPP_DEPRECATED_MSG`. Do you prefer a this is a separate patch?

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D90551
2020-11-24 17:37:06 +01:00
Louis Dionne ebddf90a4e [libc++] NFC: Remove outdated numbering in <bit> synopsis 2020-05-28 14:31:21 -04:00
Louis Dionne 6b77ebdc91 [NFC] Strip trailing whitespace from libc++ 2019-10-23 11:19:19 -07:00
Marshall Clow 30f12a4247 Implement most of P1612R1: Relocate endian. Moves the std::endian functionality from 'type-traits' to 'bit'. No other change. The reason that this is 'partial' is that P1621 also recommends a feature-test macro, but I don't have the value for that one yet. In a month or so, I'll add that
llvm-svn: 366776
2019-07-23 04:20:19 +00:00
Marshall Clow f3b851f0b8 Reorganize the 'bit' header to make most of the facilities available for internal use pre-C++20. NFC for external users
llvm-svn: 365854
2019-07-12 01:01:55 +00:00
Marshall Clow bd7f84a482 Use new '__libcpp_is_constant_evaluated' call to remove an '#ifdef' from the bit code. NFC
llvm-svn: 364884
2019-07-02 03:21:16 +00:00
Marshall Clow a5c3485a58 Bit Operations: P0556, P0553 and P1355. Reviewed as: https://reviews.llvm.org/D51262
llvm-svn: 364862
2019-07-01 23:00:32 +00:00
Chandler Carruth 57b08b0944 Update more file headers across all of the LLVM projects in the monorepo
to reflect the new license. These used slightly different spellings that
defeated my regular expressions.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351648
2019-01-19 10:56:40 +00:00
Marshall Clow f56972e224 Implement the infrastructure for feature-test macros. Very few actual feature test macros, though. Reviewed as: https://reviews.llvm.org/D51955
llvm-svn: 342073
2018-09-12 19:41:40 +00:00
Marshall Clow ecb7f4da68 Refactor the newly created <bit> header. Still (almost) NFC. Reviewed as https://reviews.llvm.org/D50876
llvm-svn: 340049
2018-08-17 17:27:25 +00:00
Marshall Clow e02ee4f013 Recommit r339943 - Establish the <bit> header. NFC yet. Reviewed as https://reviews.llvm.org/D50815 - with a fix for the sanitizer bots
llvm-svn: 340045
2018-08-17 16:07:48 +00:00
Vitaly Buka 0d52fce74d Revert "Establish the <bit> header. NFC yet. Reviewed as https://reviews.llvm.org/D50815"
Breaks build on sanitizer bots.

This reverts commit r339943.

llvm-svn: 339971
2018-08-16 23:57:16 +00:00
Marshall Clow 496bb865c6 Establish the <bit> header. NFC yet. Reviewed as https://reviews.llvm.org/D50815
llvm-svn: 339943
2018-08-16 21:35:38 +00:00