Enum AttributeArg 

pub enum AttributeArg {
    Path {
        segments: NonEmpty<Ident>,
        span: Span,
    },
    RangeStep {
        step: u64,
        span: Span,
    },
    Group {
        elements: Vec<Self>,
        span: Span,
    },
}

An argument inside an attribute’s parenthesized list.

Supports plain identifiers (pressure_safe), qualified paths (Index.Variant), Nat range steps (#2), and parenthesized groups ((Mode.Boost, Phase.Launch), (Mode.Boost, #2)).

Variants

Path

A path of one or more .-separated segments: foo, Index.Variant.

Fields

segments: NonEmpty<Ident>

span: Span

RangeStep

A Nat range step key: #N — matches the #N slice-label syntax of table expressions for range(N) axes.

Fields

step: u64

span: Span

Group

A parenthesized group of args: (Index.A, Index.B).

Fields

elements: Vec<Self>

span: Span

Implementations

impl AttributeArg

pub const fn span(&self) -> Span

Returns the span of this argument.

Trait Implementations

impl Clone for AttributeArg

fn clone(&self) -> AttributeArg

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AttributeArg

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FormatEquivalent for AttributeArg

fn format_equivalent(&self, other: &Self) -> bool

Returns true if self and other are equivalent up to formatting.