Include trailing comma in single param vertical fn#6890
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Thanks. Considering
- Self-consistency with
fn_params_layout = "Tall"which already adds trailing commas for single param fn, and - Inserting a trailing comma is generally better for minimizing extra diff lines
This makes sense to me. However, I think the fix needs to be gated behind a style edition.
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed. Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers. |
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When formatting a function with a single parameter with `fn_params_layout` set to `Vertical`, the previous tactic would remove any trailing commas before spilling to multiple lines for other reasons, such as long function names or return types. Instead, use the same tactic as `Tall` does, so that the trailing comma is kept if the end result spans multiple lines. `fn_params_layout = "Vertical"` is stable, so this is a breaking change. Guard on the style edition so that it only takes effect starting in the next edition. Issue rust-lang#6889 `fn_params_layout = "Vertical"` removes single argument's trailing comma
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When formatting a function with a single parameter with
fn_params_layoutset toVertical, the previous tactic would remove any trailing commas before spilling to multiple lines for other reasons, such as long function names or return types. Instead, use the same tactic asTalldoes, so that the trailing comma is kept if the end result spans multiple lines.Resolves #6889
fn_params_layout = "Vertical"removes single argument's trailing comma