[ranges] Consistent style for negated fold expressions in constraints
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Description
I'm reasonably certain that LWG has forwarded papers for C++23 that use the syntax (for a type pack class... Ts):
requires (!(meow && ... && Ts))
and other papers that use:
requires (!meow || ... || !Ts)
These forms are functionally equivalent. I think we should pick one syntax for such negated folds and use it consistently.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by searching the draft for the two negated fold-expression forms shown in the issue and list where each occurs. Review the surrounding constraints and the referenced C++23 wording to determine the applicable scope. Done means the selected syntax is used consistently in the relevant draft text.
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Assessment
- Tech stack
- cpp
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- documentation
- Issue type
- Documentation
- Difficulty
- 3/5
- Estimated time
- 1-2 days
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- Stale
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- Mostly clear
- Newbie friendliness
- 35/100