[PATCH v3 0/4] libstdc++: Implement padded layouts.

[Luc Grosheintz]

On 9/25/25 1:27 PM, Tomasz Kaminski wrote:
> Hi,
> 
> I have reviewed all the patches, and the comments are mostly style, and
> few organizational, but there are a bunch of them. I may also take another
> quick look on
> constraints tomorrow, to see if I missed anything, so you may wait with
> posting if you
> prefer avoiding another revision.

Thank you, I've started reading through them. I'll start making
all changes locally; but wait with posting v4. Please let me know
when you consider the review round completed.
> 
> Regards,
> Tomasz
> 
> On Tue, Sep 23, 2025 at 3:32 PM Luc Grosheintz <luc.grosheintz@gmail.com>
> wrote:
> 
>> Changes since v2:
>>
>>    - Refactored/rewrote the implementation of layout_left_padded.
>>    - Added implementation of layout_right_padded.
>>    - Implemented the review comments.
>>
>> Luc Grosheintz (4):
>>    libstdc++: Prepare mapping layout tests for padded layouts.
>>    libstdc++: Refactor __mdspan::__static_quotient.
>>    libstdc++: Implement std::layout_left_padded.
>>    libstdc++: Implement layout_right_padded.
>>
>>   libstdc++-v3/include/bits/version.def         |  10 +
>>   libstdc++-v3/include/bits/version.h           |   9 +
>>   libstdc++-v3/include/std/mdspan               | 947 +++++++++++++++++-
>>   libstdc++-v3/src/c++23/std.cc.in              |   9 +-
>>   .../mdspan/layouts/class_mandate_neg.cc       |   1 +
>>   .../23_containers/mdspan/layouts/ctors.cc     |  70 +-
>>   .../23_containers/mdspan/layouts/empty.cc     | 161 +--
>>   .../23_containers/mdspan/layouts/mapping.cc   | 242 ++++-
>>   .../23_containers/mdspan/layouts/padded.cc    | 679 +++++++++++++
>>   .../mdspan/layouts/padded_neg.cc              | 352 +++++++
>>   .../mdspan/layouts/padded_traits.h            | 192 ++++
>>   11 files changed, 2535 insertions(+), 137 deletions(-)
>>   create mode 100644
>> libstdc++-v3/testsuite/23_containers/mdspan/layouts/padded.cc
>>   create mode 100644
>> libstdc++-v3/testsuite/23_containers/mdspan/layouts/padded_neg.cc
>>   create mode 100644
>> libstdc++-v3/testsuite/23_containers/mdspan/layouts/padded_traits.h
>>
>> --
>> 2.50.1
>>
>>
>