rust-lang / rust-lang/rustfmt

Allow not indenting match arms

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#2,937 1 comment 15 reactions 0 assignees View on GitHub

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A-matches C-feature-request only-with-option P-low
Dominant language
Rust
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Description

It's a common style in C++ to see:

switch (foo) {
case Foo::Bar: {
  ...
} break;
case Foo::Baz: {
  ...
} break;
}

I would like a similar style to be possible with rustfmt:

match foo {
| Foo::Bar => {
    ...
}
| Foo::Baz => {
    ...
}
}

or

match foo {
Foo::Bar => {
    ...
}
Foo::Baz => {
    ...
}
}

This would require two configuration options, probably; | before each case, and the non-indentation.

Thanks!

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Research direction

No file or test is named in the issue. Start by locating rustfmt's match-arm formatting and configuration handling, then determine how the proposed alternatives should be represented as options. Done means the requested match-arm styles are configurable and covered by formatting tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
tooling
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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