Struct rustc_ap_rustc_ast::ast::MetaItem

pub struct MetaItem {
    pub path: Path,
    pub kind: MetaItemKind,
    pub span: Span,
}

A spanned compile-time attribute item.

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

Fields

path: Path

kind: MetaItemKind

span: Span

Implementations

impl MetaItem

pub fn ident(&self) -> Option<Ident>

For a single-segment meta item, returns its name; otherwise, returns None.

pub fn name_or_empty(&self) -> Symbol

pub fn name_value_literal(&self) -> Option<&Lit>

pub fn value_str(&self) -> Option<Symbol>

pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]>

pub fn is_word(&self) -> bool

pub fn has_name(&self, name: Symbol) -> bool

pub fn is_value_str(&self) -> bool

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

This is used in case you want the value span instead of the whole attribute. Example:

#[doc(alias = "foo")]

In here, it'll return a span for "foo".

Trait Implementations

impl Clone for MetaItem

fn clone(&self) -> MetaItem

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MetaItem

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

Formats the value using the given formatter.

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

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

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

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

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

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