pub enum Variants<FieldIdx: Idx, VariantIdx: Idx> {
Single {
index: VariantIdx,
},
Multiple {
tag: Scalar,
tag_encoding: TagEncoding<VariantIdx>,
tag_field: usize,
variants: IndexVec<VariantIdx, LayoutS<FieldIdx, VariantIdx>>,
},
}
Variants§
Single
Single enum variants, structs/tuples, unions, and all non-ADTs.
Fields
§
index: VariantIdx
Multiple
Enum-likes with more than one variant: each variant comes with a discriminant (usually the same as the variant index but the user can assign explicit discriminant values). That discriminant is encoded as a tag on the machine. The layout of each variant is a struct, and they all have space reserved for the tag. For enums, the tag is the sole field of the layout.
Trait Implementations§
source§impl<FieldIdx: Clone + Idx, VariantIdx: Clone + Idx> Clone for Variants<FieldIdx, VariantIdx>
impl<FieldIdx: Clone + Idx, VariantIdx: Clone + Idx> Clone for Variants<FieldIdx, VariantIdx>
source§impl<FieldIdx: Debug + Idx, VariantIdx: Debug + Idx> Debug for Variants<FieldIdx, VariantIdx>
impl<FieldIdx: Debug + Idx, VariantIdx: Debug + Idx> Debug for Variants<FieldIdx, VariantIdx>
source§impl<FieldIdx, VariantIdx, __CTX> HashStable<__CTX> for Variants<FieldIdx, VariantIdx>where
__CTX: HashStableContext,
VariantIdx: HashStable<__CTX> + Idx,
FieldIdx: HashStable<__CTX> + Idx,
impl<FieldIdx, VariantIdx, __CTX> HashStable<__CTX> for Variants<FieldIdx, VariantIdx>where
__CTX: HashStableContext,
VariantIdx: HashStable<__CTX> + Idx,
FieldIdx: HashStable<__CTX> + Idx,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl<FieldIdx: PartialEq + Idx, VariantIdx: PartialEq + Idx> PartialEq for Variants<FieldIdx, VariantIdx>
impl<FieldIdx: PartialEq + Idx, VariantIdx: PartialEq + Idx> PartialEq for Variants<FieldIdx, VariantIdx>
impl<FieldIdx: Eq + Idx, VariantIdx: Eq + Idx> Eq for Variants<FieldIdx, VariantIdx>
impl<FieldIdx: Idx, VariantIdx: Idx> StructuralPartialEq for Variants<FieldIdx, VariantIdx>
Auto Trait Implementations§
impl<FieldIdx, VariantIdx> Freeze for Variants<FieldIdx, VariantIdx>where
VariantIdx: Freeze,
impl<FieldIdx, VariantIdx> RefUnwindSafe for Variants<FieldIdx, VariantIdx>where
VariantIdx: RefUnwindSafe,
impl<FieldIdx, VariantIdx> Send for Variants<FieldIdx, VariantIdx>where
VariantIdx: Send,
impl<FieldIdx, VariantIdx> Sync for Variants<FieldIdx, VariantIdx>where
VariantIdx: Sync,
impl<FieldIdx, VariantIdx> Unpin for Variants<FieldIdx, VariantIdx>where
VariantIdx: Unpin,
impl<FieldIdx, VariantIdx> UnwindSafe for Variants<FieldIdx, VariantIdx>where
VariantIdx: UnwindSafe,
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§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.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: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.