rust-lang / rust-lang/rust-clippy
new lint: unneccessary iterator conversion: vec -> iter -> reverse -> collect -> vec
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Description
if we have a Vec and vec.into_iter().rev().collect::<Vec<_>>(), we should probably just vec.reverse().
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
Locate the existing lint implementations and tests for iterator-conversion patterns, then check how this Vec expression is represented and diagnosed. Done means the unnecessary conversion is reported with an appropriate suggestion to reverse the Vec directly, with coverage for the stated pattern.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100