P3059R2 Making User-Defined Constructors Of View Iterators/Sentinels `private`
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cxx20
defect report
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- C++
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Description
WG21-P3059R2 Making User-Defined Constructors Of View Iterators/Sentinels private
No feature-test macro is mentioned.
At the 2026-03 meeting in Croydon, this was formally accepted as a Defect Report, which should be implemented retroactively back to C++20.
Contributor guide
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
Read WG21-P3059R2 first, then locate the view iterator and sentinel implementations affected by its requirement. Check how those types are currently constructed and how C++20 conformance is tested; done means the Defect Report is implemented retroactively to C++20, with no feature-test macro added.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 45/100