NVIDIA / NVIDIA/cccl

[FEA]: P3383R3 mdspan.at()

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C++26 libcu++
Dominant language
C++
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Description

This issue can be closed by implementing [P3383R3](https://wg21.link/P3383R3)

Contributor guide

Open the contributing guide

Research direction

Start by reading the linked P3383R3 proposal and locating the repository's mdspan implementation and tests; no specific files or entry points are named in the issue. Determine the required mdspan.at() behavior from the proposal, then consider the work complete when the implementation conforms and relevant tests pass.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
hpc
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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