This implements P0009 std::mdspan ((https://wg21.link/p0009)),
a multidimensional span with customization points for
layouts and data access.
Co-authored-by: Damien L-G <dalg24@gmail.com>
Differential Revision: https://reviews.llvm.org/154367
Drive-by fix to make sure the __retarget_buffer works correctly whan
using a hint of 1. This was discovered in one of the new tests.
Drive-by fixes __retarget_buffer when initialized with size 1.
Implements parts of
- P2093R14 Formatted output
- P2539R4 Should the output of std::print to a terminal be
synchronized with the underlying stream?
Reviewed By: #libc, ldionne
Differential Revision: https://reviews.llvm.org/D150044
This commit implements default_accessor in support of C++23 mdspan
(https://wg21.link/p0009). default_accessor is the trivial accessor
using plain pointers and reference to element types.
Co-authored-by: Damien L-G <dalg24@gmail.com>
Differential Revision: https://reviews.llvm.org/D153935
Remove spaces between operator"" and identifier to suppress
-Wdeprecated-literal-operator, and between operator and ""
like how they are written in [string.view.literals] and [basic.string.literals].
Differential Revision: https://reviews.llvm.org/D155200
This is a preparation for
P2093R14 Formatted output
When the output of print is to the terminal it needs to use the native
API. This means transcoding UTF-8 to UTF-16 on Windows. The encoder's
interface is modeled after
P2728 Unicode in the Library, Part 1: UTF Transcoding
But only the required part for P2093R14 is implemented.
On Windows wchar_t is 16 bits, in order to test on platforms where
wchar_t is 32 bits the transcoder has support for char16_t. It also adds
and UTF-8 to UTF-32 encoder which is useful for other tests.
Note it is possible to use <codecvt> for transcoding, but that header is
deprecated. So rather write new code that is not deprecated; the hard
part, decoding, has already been done. The <codecvt> header also
requires locale support while the new code works without including
<locale>.
Note the current transcoder implementation can be optimized since it
basically does UTF-8 -> UTF-32 -> UTF-16. The first goal is to have a
working implementation. Since it's not part of the ABI it's possible to
do the optimization later.
Depends on D149672
Reviewed By: ldionne, tahonermann, #libc
Differential Revision: https://reviews.llvm.org/D150031
The first issue was found by @ldionne, upon further investigation there
were more duplicates. This removes the duplicates and updates the
clang-tidy test to detect duplicates.
Reviewed By: ldionne, #libc
Differential Revision: https://reviews.llvm.org/D154723
This commit implements layout_left in support of C++23 mdspan
(https://wg21.link/p0009). layout_left is a layout mapping policy
whose index mapping corresponds to the memory layout of Fortran arrays.
Thus the left most index has stride-1 access, and the right most index
is associated with the largest stride.
Co-authored-by: Damien L-G <dalg24@gmail.com>
Differential Revision: https://reviews.llvm.org/D153783
This commit implements layout_right in support of C++23 mdspan
(https://wg21.link/p0009). layout_right is a layout mapping policy
whose index mapping corresponds to the memory layout of multidimensional
C-arrays, and is thus also referred to as the C-layout.
Co-authored-by: Damien L-G <dalg24@gmail.com>
Differential Revision: https://reviews.llvm.org/D151267
This updates:
- The status tables
- Feature test macros
- New headers for modules
The latter avoids forgetting about modules when implementing the feature
in a new header.
Reviewed By: #libc, philnik
Differential Revision: https://reviews.llvm.org/D153192
The patch is based on D144994.
D151030 added the module definitions for the module std.
This patch wires in the module and enables the basic testing.
Some notable features are missing:
- There is no test that libc++ can be fully imported as a module.
- This lacks the parts for the std.compat module.
- The module is not shipped with libc++.
Implements parts of
- P2465R3 Standard Library Modules std and std.compat
Reviewed By: ldionne, aaronmondal, #libc
Differential Revision: https://reviews.llvm.org/D151814
This adds the cppm files of D144994. These files by themselves will do
nothing. The goal is to reduce the size of D144994 and making it easier
to review the real changes of the patch.
Implements parts of
- P2465R3 Standard Library Modules std and std.compat
Reviewed By: ldionne, ChuanqiXu, aaronmondal, #libc
Differential Revision: https://reviews.llvm.org/D151030
