rust-lang / rust-lang/rust-mode
Bitwise shift operator breaks indentation rules
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help wanted
indentation
- Dominant language
- Emacs Lisp
- Stars
- 1.3k
- Forks
- 198
- PR merge metrics
- No merged PRs in 30d
Description
When I let Emacs indent this code, it assumes the bitwise shift operator is an opening angle bracket.
let a = u32::MAX << 5;
The issue is caused by the column characters, I personally think rust-is-lt-char-operator doesn't handle this special case.
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First steps
- Read the whole issue, then the project's contributing guide.
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating rust-is-lt-char-operator and reproduce the indentation behavior with let a = u32::MAX << 5;. Trace how the two shift characters are classified during indentation, then verify that the expression is indented as a bitwise shift rather than as an opening angle bracket.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- emacs-lisp, rust
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100