Vague Union Legality Rules (4.4.3)
Open
Nobody has claimed this yet.
A-content
A-unions
C-enhancement
- Dominant language
- reStructuredText
- Stars
- 497
- Forks
- 41
- Avg merge
- 3h 52m
- Merged PRs (30d)
- 4
Description
4.4.3:1 A union type is an abstract data type similar to a C-like union.
This isn't sufficient and improperly permissive. Rust rules for unions will have some mismatch with C unions. It does not defined (subsets of) the permitted values as per B.509. type, making unions effectively uninstantiable.
See also: ongoing internal discussion
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
Start by reading section 4.4.3 and the referenced B.509 type definition, then review the linked unsafe-code-guidelines discussion. The work is complete when the specification defines the permitted values for union types and resolves their instantiability without relying on the current C-union wording.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100