Enum rustc_ast::ast::MetaItemKind

pub enum MetaItemKind {
    Word,
    List(Vec<NestedMetaItem>),
    NameValue(Lit),
}

A compile-time attribute item.

E.g., #[test], #[derive(..)] or #[feature = "foo"].

Variants

Word

Word meta item.

E.g., test as in #[test].

List(Vec<NestedMetaItem>)

List meta item.

E.g., derive(..) as in #[derive(..)].

NameValue(Lit)

Name value meta item.

E.g., feature = "foo" as in #[feature = "foo"].

Implementations

impl MetaItemKind

pub fn mac_args(&self, span: Span) -> MacArgs

pub(in attr) fn token_trees_and_spacings(
    &self,
    span: Span
) -> Vec<TreeAndSpacing>

pub(in attr) fn list_from_tokens(
    tokens: TokenStream
) -> Option<MetaItemKind>

pub(in attr) fn name_value_from_tokens(
    tokens: &mut impl Iterator<Item = TokenTree>
) -> Option<MetaItemKind>

pub(in attr) fn from_mac_args(
    args: &MacArgs
) -> Option<MetaItemKind>

pub(in attr) fn from_tokens(
    tokens: &mut Peekable<impl Iterator<Item = TokenTree>>
) -> Option<MetaItemKind>

Trait Implementations

impl Clone for MetaItemKind

pub fn clone(&self) -> MetaItemKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MetaItemKind

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

Formats the value using the given formatter.

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

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

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

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

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

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