rust-lang / rust-lang/rustfmt

rustfmt removes comments from visibility annotation

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#6,669 0 comments 0 reactions 0 assignees View on GitHub

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A-comments C-bug I-unexpectedly-removes-code
Dominant language
Rust
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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Description

Noticed a few times

-pub(crate /* important comment */) fn add(left: u64, right: u64) -> u64 {
+pub(crate) fn add(left: u64, right: u64) -> u64 {
     left + right
 }

There seem to be a lot of issues related to comments but I couldn't find this specific one after some basic searching.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the issue with the visibility-annotation snippet in rustfmt and trace how that syntax is formatted. Locate the relevant formatter tests and add a regression case showing that the comment is preserved; the work is done when rustfmt retains the comment and the regression test passes.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
48/100

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