Enum rustc_ast::ast::MetaItemKind
source · pub enum MetaItemKind {
Word,
List(ThinVec<NestedMetaItem>),
NameValue(MetaItemLit),
}
Expand description
The meta item kind, containing the data after the initial path.
Variants§
Word
Word meta item.
E.g., #[test]
, which lacks any arguments after test
.
List(ThinVec<NestedMetaItem>)
List meta item.
E.g., #[derive(..)]
, where the field represents the ..
.
NameValue(MetaItemLit)
Name value meta item.
E.g., #[feature = "foo"]
, where the field represents the "foo"
.
Implementations§
source§impl MetaItemKind
impl MetaItemKind
fn list_from_tokens(tokens: TokenStream) -> Option<ThinVec<NestedMetaItem>>
fn name_value_from_tokens<'a>( tokens: &mut impl Iterator<Item = &'a TokenTree>, ) -> Option<MetaItemKind>
fn from_tokens<'a>( tokens: &mut Peekable<impl Iterator<Item = &'a TokenTree>>, ) -> Option<MetaItemKind>
fn from_attr_args(args: &AttrArgs) -> Option<MetaItemKind>
Trait Implementations§
source§impl Clone for MetaItemKind
impl Clone for MetaItemKind
source§fn clone(&self) -> MetaItemKind
fn clone(&self) -> MetaItemKind
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for MetaItemKind
impl Debug for MetaItemKind
source§impl<__D: SpanDecoder> Decodable<__D> for MetaItemKind
impl<__D: SpanDecoder> Decodable<__D> for MetaItemKind
source§impl<__E: SpanEncoder> Encodable<__E> for MetaItemKind
impl<__E: SpanEncoder> Encodable<__E> for MetaItemKind
source§impl<__CTX> HashStable<__CTX> for MetaItemKindwhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for MetaItemKindwhere
__CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
Auto Trait Implementations§
impl Freeze for MetaItemKind
impl !RefUnwindSafe for MetaItemKind
impl !Send for MetaItemKind
impl !Sync for MetaItemKind
impl Unpin for MetaItemKind
impl !UnwindSafe for MetaItemKind
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
Layout§
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.
Size: 40 bytes
Size for each variant:
Word
: 0 bytesList
: 8 bytesNameValue
: 40 bytes