Rustfmt refuses to format this block of Rust.

[Qix-]

For some reason, rustfmt won't touch this code.

fn basic_placeholder() {
    let eq =
        stmt.content_eq(
            :: oxc_quote :: private :: Vec ::
from_array_in([stmt.into(), :: oxc_quote :: private :: Statement ::
VariableDeclaration(:: oxc_quote :: private :: Box ::
new_in(:: oxc_quote :: private :: VariableDeclaration
{
    span : span, kind : :: oxc_quote :: private :: VariableDeclarationKind ::
    Var, declarations : :: oxc_quote :: private :: Vec ::
    from_array_in([:: oxc_quote :: private :: VariableDeclarator
    {
        span : span, kind : :: oxc_quote :: private :: VariableDeclarationKind
        :: Var, id : :: oxc_quote :: private :: BindingPattern
        {
            kind : :: oxc_quote :: private :: BindingPatternKind ::
            BindingIdentifier(:: oxc_quote :: private :: Box ::
            new_in(:: oxc_quote :: private :: BindingIdentifier
            {
                span : span, name : :: oxc_quote :: private :: Atom ::
                from("bar"), symbol_id : :: std :: cell :: Cell :: new(None),
            }, & a)), type_annotation : :: std :: option :: Option :: None,
            optional : false,
        }, init : :: std :: option :: Option ::
        Some(:: oxc_quote :: private :: Expression ::
        BinaryExpression(:: oxc_quote :: private :: Box ::
        new_in(:: oxc_quote :: private :: BinaryExpression
        {
            span : span, left : :: oxc_quote :: private :: Expression ::
            Identifier(:: oxc_quote :: private :: Box ::
            new_in(:: oxc_quote :: private :: IdentifierReference
            {
                span : span, name : :: oxc_quote :: private :: Atom ::
                from("foo"), reference_id : :: std :: cell :: Cell ::
                new(None),
            }, & a)), operator : :: oxc_quote :: private :: BinaryOperator ::
            Multiplication, right : :: oxc_quote :: private :: Expression ::
            NumericLiteral(:: oxc_quote :: private :: Box ::
            new_in(:: oxc_quote :: private :: NumericLiteral
            {
                span : span, value : 2f64, raw : :: std :: option :: Option ::
                Some(:: oxc_quote :: private :: Atom :: from("2")), base : ::
                oxc_quote :: private :: NumberBase :: Decimal,
            }, & a)),
        }, & a))), definite : false,
    },], & a), declare : false,
}, & a)),], & a))
    ;
}

https://play.rust-lang.org/?version=stable&mode=debug&edition=2024&gist=14f6ff72d26385355b3f2277bf064107

I'm aware it's hairy (it's generated), but at least it should format it somewhat nicely.

First noticed via the CLI via cargo fmt --all and confirmed in the playground.

If I remove all of the :: oxc_quote :: private :: stuff, it formats fine.

[ytmimi]

This is a duplicate of #3863.

rustfmt typically doesn't handle generated code very well because it can be very nested. If you'd like rustfmt to try and format this you could try bumping the max_width to some sufficiently large value.