Enum MetaItem

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pub enum MetaItem {
    Path(Path),
    Tokens(TokenStream),
    KeyValue {
        path: Path,
        eq: Eq,
        tokens: TokenStream,
    },
    List {
        path: Path,
        delimiter: MacroDelimiter,
        items: Punctuated<MetaItem, Comma>,
    },
}

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Path(Path)

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Tokens(TokenStream)

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KeyValue

Fields

§path: Path
§eq: Eq
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List

Fields

§path: Path
§delimiter: MacroDelimiter

Implementations§

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impl MetaItem

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pub fn attr_path(&self) -> Option<&Path>

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

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pub fn tokens(&self) -> Option<&TokenStream>

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pub fn parse_value<T: Parse>(&self, expected: &str) -> Result<T>

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pub fn parse_value_with<P: Parser>( &self, parser: P, expected: &str, ) -> Result<P::Output>

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pub fn expected(&self, k: &str) -> Diagnostic

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pub fn description(&self) -> &'static str

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pub fn is_bare(&self) -> bool

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pub fn expr(&self) -> Result<Expr>

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pub fn path(&self) -> Result<Path>

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pub fn lit(&self) -> Result<Lit>

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pub fn list(&self) -> Result<impl Iterator<Item = &MetaItem> + Clone>

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pub fn value_span(&self) -> Span

Trait Implementations§

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impl Clone for MetaItem

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fn clone(&self) -> MetaItem

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MetaItem

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

Formats the value using the given formatter. Read more
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impl Parse for MetaItem

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fn parse(input: ParseStream<'_>) -> Result<Self>

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impl ToTokens for MetaItem

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fn to_tokens(&self, stream: &mut TokenStream)

Write self to the given TokenStream. Read more
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fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object. Read more
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fn into_token_stream(self) -> TokenStream
where Self: Sized,

Convert self directly into a TokenStream object. Read more
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impl TryFrom<Meta> for MetaItem

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(value: Meta) -> Result<Self, Self::Error>

Performs the conversion.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AstItemExt for T
where T: ToTokens,

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fn respanned(&self, span: Span) -> T
where T: Parse,

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

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Spanned for T
where T: Spanned + ?Sized,

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fn span(&self) -> Span

Returns a Span covering the complete contents of this syntax tree node, or Span::call_site() if this node is empty.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.