Enum syntax::ast::MetaItemKind

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

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A compile-time attribute item.

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

Variants

Word

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Word meta item.

E.g. test as in #[test]

List(Vec<NestedMetaItem>)

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List meta item.

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

NameValue(Lit)

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Name value meta item.

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

Methods

impl MetaItemKind

pub fn tokens(&self, span: Span) -> TokenStream

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fn from_tokens<I>(tokens: &mut Peekable<I>) -> Option<MetaItemKind> where     I: Iterator<Item = TokenTree>,

🔬 This is a nightly-only experimental API. (rustc_private)

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Trait Implementations

impl Clone for MetaItemKind

fn clone(&self) -> MetaItemKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Encodable for MetaItemKind

fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>

🔬 This is a nightly-only experimental API. (rustc_private)

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impl Decodable for MetaItemKind

fn decode<__D: Decoder>(d: &mut __D) -> Result<MetaItemKind, __D::Error>

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

impl Debug for MetaItemKind

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

Formats the value using the given formatter.