rustc_abi

Enum Variants

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pub enum Variants<FieldIdx: Idx, VariantIdx: Idx> {
    Single {
        index: VariantIdx,
    },
    Multiple {
        tag: Scalar,
        tag_encoding: TagEncoding<VariantIdx>,
        tag_field: usize,
        variants: IndexVec<VariantIdx, LayoutData<FieldIdx, VariantIdx>>,
    },
}

Variants§

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Single

Single enum variants, structs/tuples, unions, and all non-ADTs.

Fields

§index: VariantIdx
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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.

Fields

§tag: Scalar
§tag_encoding: TagEncoding<VariantIdx>
§tag_field: usize
§variants: IndexVec<VariantIdx, LayoutData<FieldIdx, VariantIdx>>

Trait Implementations§

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impl<FieldIdx: Clone + Idx, VariantIdx: Clone + Idx> Clone for Variants<FieldIdx, VariantIdx>

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fn clone(&self) -> Variants<FieldIdx, VariantIdx>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<FieldIdx: Debug + Idx, VariantIdx: Debug + Idx> Debug for Variants<FieldIdx, VariantIdx>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<FieldIdx: Hash + Idx, VariantIdx: Hash + Idx> Hash for Variants<FieldIdx, VariantIdx>

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<FieldIdx, VariantIdx, __CTX> HashStable<__CTX> for Variants<FieldIdx, VariantIdx>
where __CTX: HashStableContext, VariantIdx: HashStable<__CTX> + Idx, FieldIdx: HashStable<__CTX> + Idx,

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fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

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impl<FieldIdx: PartialEq + Idx, VariantIdx: PartialEq + Idx> PartialEq for Variants<FieldIdx, VariantIdx>

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fn eq(&self, other: &Variants<FieldIdx, VariantIdx>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<FieldIdx: Eq + Idx, VariantIdx: Eq + Idx> Eq for Variants<FieldIdx, VariantIdx>

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impl<FieldIdx: Idx, VariantIdx: Idx> StructuralPartialEq for Variants<FieldIdx, VariantIdx>

Auto Trait Implementations§

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impl<FieldIdx, VariantIdx> DynSend for Variants<FieldIdx, VariantIdx>
where VariantIdx: DynSend,

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impl<FieldIdx, VariantIdx> DynSync for Variants<FieldIdx, VariantIdx>
where VariantIdx: DynSync,

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impl<FieldIdx, VariantIdx> Freeze for Variants<FieldIdx, VariantIdx>
where VariantIdx: Freeze,

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impl<FieldIdx, VariantIdx> RefUnwindSafe for Variants<FieldIdx, VariantIdx>
where VariantIdx: RefUnwindSafe,

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impl<FieldIdx, VariantIdx> Send for Variants<FieldIdx, VariantIdx>
where VariantIdx: Send,

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impl<FieldIdx, VariantIdx> Sync for Variants<FieldIdx, VariantIdx>
where VariantIdx: Sync,

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impl<FieldIdx, VariantIdx> Unpin for Variants<FieldIdx, VariantIdx>
where VariantIdx: Unpin,

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impl<FieldIdx, VariantIdx> UnwindSafe for Variants<FieldIdx, VariantIdx>
where VariantIdx: UnwindSafe,

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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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 more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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 more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.