[−][src]Enum syntax::ast::VariantData
Fields and Ids of enum variants and structs
For enum variants: NodeId
represents both an Id of the variant itself (relevant for all
variant kinds) and an Id of the variant's constructor (not relevant for Struct
-variants).
One shared Id can be successfully used for these two purposes.
Id of the whole enum lives in Item
.
For structs: NodeId
represents an Id of the structure's constructor, so it is not actually
used for Struct
-structs (but still presents). Structures don't have an analogue of "Id of
the variant itself" from enum variants.
Id of the whole struct lives in Item
.
Variants
Struct(Vec<StructField>, NodeId)
Struct variant.
E.g., Bar { .. }
as in enum Foo { Bar { .. } }
.
Tuple(Vec<StructField>, NodeId)
Tuple variant.
E.g., Bar(..)
as in enum Foo { Bar(..) }
.
Unit(NodeId)
Unit variant.
E.g., Bar = ..
as in enum Foo { Bar = .. }
.
Methods
impl VariantData
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pub fn fields(&self) -> &[StructField]
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pub fn id(&self) -> NodeId
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pub fn is_struct(&self) -> bool
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pub fn is_tuple(&self) -> bool
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pub fn is_unit(&self) -> bool
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Trait Implementations
impl Clone for VariantData
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fn clone(&self) -> VariantData
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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 VariantData
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impl Encodable for VariantData
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impl Decodable for VariantData
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Auto Trait Implementations
impl !Send for VariantData
impl !Sync for VariantData
Blanket Implementations
impl<T> From for T
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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, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = !
try_from
)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> Any for T where
T: 'static + ?Sized,
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T: 'static + ?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
try_from
)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> 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,