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
pub fn value_str(&self) -> Option<Symbol>
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: Decoder> Decodable<__D> for MetaItemKind
impl<__D: Decoder> Decodable<__D> for MetaItemKind
source§impl<__E: Encoder> Encodable<__E> for MetaItemKind
impl<__E: Encoder> 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 !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
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: 48 bytes
Size for each variant:
Word
: 0 bytesList
: 8 bytesNameValue
: 48 bytes