Enum AttrArgs 

pub enum AttrArgs {
    Empty,
    Delimited(DelimArgs),
    Eq {
        eq_span: Span,
        expr: Box<Expr>,
    },
}

Arguments passed to an attribute macro.

Variants

Empty

No arguments: #[attr].

Delimited(DelimArgs)

Delimited arguments: #[attr()/[]/{}].

Eq

Arguments of a key-value attribute: #[attr = "value"].

Fields

eq_span: Span

Span of the = token.

expr: Box<Expr>

Implementations

impl AttrArgs

pub fn span(&self) -> Option<Span>

pub fn inner_tokens(&self) -> TokenStream

Tokens inside the delimiters or after =. Proc macros see these tokens, for example.

Trait Implementations

impl Clone for AttrArgs

fn clone(&self) -> AttrArgs

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttrArgs

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

Formats the value using the given formatter.

impl<__D: SpanDecoder> Decodable<__D> for AttrArgs

fn decode(__decoder: &mut __D) -> Self

impl<__E: SpanEncoder> Encodable<__E> for AttrArgs

fn encode(&self, __encoder: &mut __E)

impl<V: MutVisitor> MutVisitable<V> for AttrArgs

type Extra = ()

fn visit_mut(&mut self, visitor: &mut V, _extra: Self::Extra) -> V::Result

impl<__V> MutWalkable<__V> for AttrArgs

where __V: MutVisitor,

fn walk_mut(&mut self, __visitor: &mut __V)

impl<'a, V: Visitor<'a>> Visitable<'a, V> for AttrArgs

type Extra = ()

fn visit(&'a self, visitor: &mut V, _extra: Self::Extra) -> V::Result

impl<'__ast, __V> Walkable<'__ast, __V> for AttrArgs

where __V: Visitor<'__ast>,

fn walk_ref(&'__ast self, __visitor: &mut __V) -> __V::Result

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

• Empty: 0 bytes
• Delimited: 32 bytes
• Eq: 16 bytes