[−][src]Enum syntax::ast::NestedMetaItem
Possible values inside of compile-time attribute lists.
E.g., the '..' in #[name(..)]
.
Variants
MetaItem(MetaItem)
A full MetaItem, for recursive meta items.
Literal(Lit)
A literal.
E.g., "foo"
, 64
, true
.
Methods
impl NestedMetaItem
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pub fn meta_item(&self) -> Option<&MetaItem>
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Returns the MetaItem if self is a NestedMetaItem::MetaItem.
pub fn literal(&self) -> Option<&Lit>
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Returns the Lit if self is a NestedMetaItem::Literal.
pub fn check_name(&self, name: &str) -> bool
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Returns true
if this list item is a MetaItem with a name of name
.
pub fn ident(&self) -> Option<Ident>
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For a single-segment meta-item returns its name, otherwise returns None
.
pub fn ident_str(&self) -> Option<&str>
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pub fn value_str(&self) -> Option<Symbol>
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Gets the string value if self is a MetaItem and the MetaItem is a MetaItemKind::NameValue variant containing a string, otherwise None.
pub fn name_value_literal(&self) -> Option<(Name, &Lit)>
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Returns a name and single literal value tuple of the MetaItem.
pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]>
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Gets a list of inner meta items from a list MetaItem type.
pub fn is_meta_item(&self) -> bool
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Returns true
if the variant is MetaItem.
pub fn is_literal(&self) -> bool
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Returns true
if the variant is Literal.
pub fn is_word(&self) -> bool
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Returns true
if self is a MetaItem and the meta item is a word.
pub fn is_value_str(&self) -> bool
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Returns true
if self is a MetaItem and the meta item is a ValueString.
pub fn is_meta_item_list(&self) -> bool
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Returns true
if self is a MetaItem and the meta item is a list.
impl NestedMetaItem
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Trait Implementations
impl Clone for NestedMetaItem
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fn clone(&self) -> NestedMetaItem
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl Debug for NestedMetaItem
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impl Encodable for NestedMetaItem
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impl Decodable for NestedMetaItem
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Auto Trait Implementations
impl !Send for NestedMetaItem
impl !Sync for NestedMetaItem
Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T> From for T
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impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
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T: UseSpecializedEncodable + ?Sized,
impl<T> Decodable for T where
T: UseSpecializedDecodable,
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T: UseSpecializedDecodable,
impl<E> SpecializationError for E
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impl<T> Send for T where
T: ?Sized,
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T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
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T: ?Sized,