rust-lang / rust-lang/rust-clippy
iterating over empty collections
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A-lint
- Dominant language
- Rust
- Stars
- 13.5k
- Forks
- 2.2k
- Avg merge
- 2d 10h
- Merged PRs (30d)
- 32
Description
What it does
Warn when we iterate over a collection that we know is empty
let v = vec![1,2,3];
if v.is_empty() {
v.iter()....
}
maybe the condition was supposed to be inverted?
Lint Name
maybe iter_empty ?
Category
suspicious
Advantage
No response
Drawbacks
No response
Example
see above
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
No file, test, or entry point is named; begin by locating Clippy's suspicious-lint implementations and their UI tests. Clarify the intended lint name and what counts as a provably empty collection, then define completion as a warning and regression coverage for the shown pattern.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100