Rustfmt: Combine all delimited exprs as last argument
Summary
- Some expressions with multi-line final arguments will now format as a single line, with the final expression overflowing.
Details
When structs, slices, arrays, and block/array-like macros are used as the last argument in an expression list, they are now allowed to overflow (like blocks/closures) instead of being indented on a new line.
// Edition 2021
fn example() {
foo(ctx, |param| {
action();
foo(param)
});
foo(
ctx,
Bar {
x: value,
y: value2,
},
);
foo(
ctx,
&[
MAROON_TOMATOES,
PURPLE_POTATOES,
ORGANE_ORANGES,
GREEN_PEARS,
RED_APPLES,
],
);
foo(
ctx,
vec![
MAROON_TOMATOES,
PURPLE_POTATOES,
ORGANE_ORANGES,
GREEN_PEARS,
RED_APPLES,
],
);
}
This now formats as the following in the 2024 style edition:
// Edition 2024
fn example() {
foo(ctx, |param| {
action();
foo(param)
});
foo(ctx, Bar {
x: value,
y: value2,
});
foo(ctx, &[
MAROON_TOMATOES,
PURPLE_POTATOES,
ORGANE_ORANGES,
GREEN_PEARS,
RED_APPLES,
]);
foo(ctx, vec![
MAROON_TOMATOES,
PURPLE_POTATOES,
ORGANE_ORANGES,
GREEN_PEARS,
RED_APPLES,
]);
}
Migration
The change can be applied automatically by running cargo fmt
or rustfmt
with the 2024 Edition. See the Style edition chapter for more information on migrating and how style editions work.