rust-lang / rust-lang/rust-analyzer
Add undefined feature diagnostic
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A-diagnostics
A-ide
C-feature
S-actionable
- Dominant language
- Rust
- Stars
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- Forks
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- Avg merge
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Description
Since this isn't really possible to solve in Clippy, I was wondering whether rust-analyzer could check for existance of a feature or optional dependency named foo in Cargo.toml when encountering cfg(feature = "foo"), and raise a warning if there isn't one.
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 tracing rust-analyzer's handling of cfg(feature = "foo") and how it reads feature and optional-dependency names from Cargo.toml. Done means an unknown feature or optional dependency produces a diagnostic, while existing names do not; add or run the relevant diagnostic tests once their location is identified.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100