rust-lang / rust-lang/rustfmt

Only generic `impl` blocks get formatted in macros

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#6,036 2 comments 1 reaction 0 assignees View on GitHub

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A-macros C-bug I-unformatted-code
Dominant language
Rust
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Description

Ideally, both should be formatted.

Test:

> echo "m!(impl One {}); m!(impl<> Two {});" | rustup run nightly rustfmt
m!(impl One {});
m!(
    impl Two {}
);

> rustup run nightly rustfmt -Vv
rustfmt 1.7.0-nightly (88189a71 2024-01-19)

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Research direction

Reproduce the behavior with the shell command in the issue using the specified nightly rustfmt version, then trace the formatter's handling of macro contents and impl blocks. Done means both impl One {} and impl<> Two {} forms are formatted consistently, with regression coverage for the demonstrated input.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
tooling
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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