microsoft / microsoft/STL

P2821R5 `span::at()`

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cxx26
Dominant language
C++
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Description

WG21-P2821R5 span::at()

INCREASED feature-test macro; note that WG21-P2833R2 #4177 is intentionally simultaneously updating this value:

#define __cpp_lib_span 202311L

Note: We are not yet accepting PRs for C++26 features.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the implementation of the __cpp_lib_span feature-test macro and review issue #4177, which is intentionally updating the same value. Done would mean coordinating the value as specified, but the issue states that pull requests for C++26 features are not yet being accepted.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
tooling
Issue type
Feature
Difficulty
1/5
Estimated time
Under an hour
Activity status
Active
Clarity
Clearly specified
Newbie friendliness
25/100

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