Support matches! with if guard
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A-macros
C-feature-request
P-low
- Dominant language
- Rust
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Description
rustfmt struggles with matches! and if guards.
fn test() {
let a = matches!(something.very_very_very.long.even.more.fields, Some(very_long_field_name_name_to_check) if method(very_long_field_name));
}
rustfmt 1.5.1-nightly (c0941dfb 2022-08-21)
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 reproducing the reported rustfmt behavior with the provided matches! example and the noted nightly version. Trace the formatter's handling of matches! expressions and if guards; done means the example formats successfully without the reported struggle.
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
- 35/100