Enum rustc_ast::ast::MacArgs

pub enum MacArgs {
    Empty,
    Delimited(DelimSpan, MacDelimiter, TokenStream),
    Eq(Span, Token),
}

Arguments passed to an attribute or a function-like macro.

Variants

Empty

No arguments - #[attr].

Delimited(DelimSpan, MacDelimiter, TokenStream)

Delimited arguments - #[attr()/[]/{}] or mac!()/[]/{}.

Tuple Fields of Delimited

0: DelimSpan1: MacDelimiter2: TokenStream

Eq(Span, Token)

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

Tuple Fields of Eq

0: Span

Span of the = token.

1: Token

“value” as a nonterminal token.

Implementations

impl MacArgs

pub fn delim(&self) -> DelimToken

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.

pub fn need_semicolon(&self) -> bool

Whether a macro with these arguments needs a semicolon when used as a standalone item or statement.

Trait Implementations

impl Clone for MacArgs

fn clone(&self) -> MacArgs

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MacArgs

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for MacArgs

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<__E: Encoder> Encodable<__E> for MacArgs

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<__CTX> HashStable<__CTX> for MacArgs where
    __CTX: HashStableContext, 

fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

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: 40 bytes

Size for each variant:

• Empty: 0 bytes
• Delimited: 31 bytes
• Eq: 39 bytes