AliasTermKind in rustc_infer::infer::canonical::ir - Rust
Description: API documentation for the Rust `AliasTermKind` enum in crate `rustc_infer`.

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## AliasTermKind

# Enum AliasTermKind

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    pub enum AliasTermKind<I>where
        I: Interner,{
        ProjectionTy {
            def_id: <I as Interner>::TraitAssocTyId,
        },
        InherentTy {
            def_id: <I as Interner>::InherentAssocTyId,
        },
        OpaqueTy {
            def_id: <I as Interner>::OpaqueTyId,
        },
        FreeTy {
            def_id: <I as Interner>::FreeTyAliasId,
        },
        UnevaluatedConst {
            def_id: <I as Interner>::UnevaluatedConstId,
        },
        ProjectionConst {
            def_id: <I as Interner>::TraitAssocConstId,
        },
        FreeConst {
            def_id: <I as Interner>::FreeConstAliasId,
        },
        InherentConst {
            def_id: <I as Interner>::InherentAssocConstId,
        },
    }

## Variants§

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### ProjectionTy

A projection `<Type as Trait>::AssocType`.

Can get normalized away if monomorphic enough.

The `def_id` is the `DefId` of the `TraitItem` for the associated type.

Note that the `def_id` is not the `DefId` of the `TraitRef` containing this associated type, which is in `interner.associated_item(def_id).container`, aka. `interner.parent(def_id)`.

#### Fields

§`def_id: <I as Interner>::TraitAssocTyId`
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### InherentTy

An associated type in an inherent `impl`

The `def_id` is the `DefId` of the `ImplItem` for the associated type.

#### Fields

§`def_id: <I as Interner>::InherentAssocTyId`
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### OpaqueTy

An opaque type (usually from `impl Trait` in type aliases or function return types)

`def_id` is the `DefId` of the `OpaqueType` item.

Can only be normalized away in `PostAnalysis` mode or its defining scope.

During codegen, `interner.type_of(def_id)` can be used to get the type of the underlying type if the type is an opaque.

#### Fields

§`def_id: <I as Interner>::OpaqueTyId`
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### FreeTy

A type alias that actually checks its trait bounds.

Currently only used if the type alias references opaque types. Can always be normalized away.

#### Fields

§`def_id: <I as Interner>::FreeTyAliasId`
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### UnevaluatedConst

An unevaluated anonymous constants.

#### Fields

§`def_id: <I as Interner>::UnevaluatedConstId`
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### ProjectionConst

An unevaluated const coming from an associated const.

#### Fields

§`def_id: <I as Interner>::TraitAssocConstId`
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### FreeConst

A top level const item not part of a trait or impl.

#### Fields

§`def_id: <I as Interner>::FreeConstAliasId`
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### InherentConst

An associated const in an inherent `impl`

#### Fields

§`def_id: <I as Interner>::InherentAssocConstId`

## Implementations§

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### impl<I> AliasTermKind<I>
where I: Interner,

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#### pub fn descr(self) -> &'static str

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#### pub fn is_type(self) -> bool

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#### pub fn def_id(self) -> <I as Interner>::DefId

## Trait Implementations§

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### impl<I> Clone for AliasTermKind<I>
where I: Interner,

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#### fn clone(&self) -> AliasTermKind<I>

Returns a duplicate 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<I> Debug for AliasTermKind<I>
where I: Interner,

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

Formats the value using the given formatter. Read more
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### impl<I, __D> Decodable<__D> for AliasTermKind<I>
where I: Interner, __D: Decoder, <I as Interner>::TraitAssocTyId: Decodable<__D>, <I as Interner>::InherentAssocTyId: Decodable<__D>, <I as Interner>::OpaqueTyId: Decodable<__D>, <I as Interner>::FreeTyAliasId: Decodable<__D>, <I as Interner>::UnevaluatedConstId: Decodable<__D>, <I as Interner>::TraitAssocConstId: Decodable<__D>, <I as Interner>::FreeConstAliasId: Decodable<__D>, <I as Interner>::InherentAssocConstId: Decodable<__D>,

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#### fn decode(__decoder: &mut __D) -> AliasTermKind<I>

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### impl<I, __E> Encodable<__E> for AliasTermKind<I>
where I: Interner, __E: Encoder, <I as Interner>::TraitAssocTyId: Encodable<__E>, <I as Interner>::InherentAssocTyId: Encodable<__E>, <I as Interner>::OpaqueTyId: Encodable<__E>, <I as Interner>::FreeTyAliasId: Encodable<__E>, <I as Interner>::UnevaluatedConstId: Encodable<__E>, <I as Interner>::TraitAssocConstId: Encodable<__E>, <I as Interner>::FreeConstAliasId: Encodable<__E>, <I as Interner>::InherentAssocConstId: Encodable<__E>,

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#### fn encode(&self, __encoder: &mut __E)

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### impl<I> From<AliasTyKind<I>> for AliasTermKind<I>
where I: Interner,

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#### fn from(value: AliasTyKind<I>) -> AliasTermKind<I>

Converts to this type from the input type.
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### impl<I> Hash for AliasTermKind<I>
where I: Interner,

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#### fn hash<__H>(&self, __state: &mut __H)
where __H: Hasher,

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<I, J> Lift<J> for AliasTermKind<I>
where <I as Interner>::OpaqueTyId: Lift<J, Lifted = <J as Interner>::OpaqueTyId>, I: Interner, <I as Interner>::FreeTyAliasId: Lift<J, Lifted = <J as Interner>::FreeTyAliasId>, <I as Interner>::UnevaluatedConstId: Lift<J, Lifted = <J as Interner>::UnevaluatedConstId>, J: Interner, <I as Interner>::TraitAssocConstId: Lift<J, Lifted = <J as Interner>::TraitAssocConstId>, <I as Interner>::TraitAssocTyId: Lift<J, Lifted = <J as Interner>::TraitAssocTyId>, <I as Interner>::FreeConstAliasId: Lift<J, Lifted = <J as Interner>::FreeConstAliasId>, <I as Interner>::InherentAssocConstId: Lift<J, Lifted = <J as Interner>::InherentAssocConstId>, <I as Interner>::InherentAssocTyId: Lift<J, Lifted = <J as Interner>::InherentAssocTyId>,

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#### type Lifted = AliasTermKind<J>

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#### fn lift_to_interner(self, interner: J) -> AliasTermKind<J>

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### impl<I> PartialEq for AliasTermKind<I>
where I: Interner,

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#### fn eq(&self, __other: &AliasTermKind<I>) -> 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<I> StableHash for AliasTermKind<I>
where I: Interner, <I as Interner>::TraitAssocTyId: StableHash, <I as Interner>::InherentAssocTyId: StableHash, <I as Interner>::OpaqueTyId: StableHash, <I as Interner>::FreeTyAliasId: StableHash, <I as Interner>::UnevaluatedConstId: StableHash, <I as Interner>::TraitAssocConstId: StableHash, <I as Interner>::FreeConstAliasId: StableHash, <I as Interner>::InherentAssocConstId: StableHash,

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#### fn stable_hash<__Hcx>( &self, __hcx: &mut __Hcx, __hasher: &mut StableHasher<SipHasher128>, )
where __Hcx: StableHashCtxt,

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### impl<I> Copy for AliasTermKind<I>
where I: Interner,

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### impl<I> Eq for AliasTermKind<I>
where I: Interner,

## Auto Trait Implementations§

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### impl<I> DynSend for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: DynSend, <I as Interner>::InherentAssocTyId: DynSend, <I as Interner>::OpaqueTyId: DynSend, <I as Interner>::FreeTyAliasId: DynSend, <I as Interner>::UnevaluatedConstId: DynSend, <I as Interner>::TraitAssocConstId: DynSend, <I as Interner>::FreeConstAliasId: DynSend, <I as Interner>::InherentAssocConstId: DynSend,

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### impl<I> DynSync for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: DynSync, <I as Interner>::InherentAssocTyId: DynSync, <I as Interner>::OpaqueTyId: DynSync, <I as Interner>::FreeTyAliasId: DynSync, <I as Interner>::UnevaluatedConstId: DynSync, <I as Interner>::TraitAssocConstId: DynSync, <I as Interner>::FreeConstAliasId: DynSync, <I as Interner>::InherentAssocConstId: DynSync,

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### impl<I> Freeze for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: Freeze, <I as Interner>::InherentAssocTyId: Freeze, <I as Interner>::OpaqueTyId: Freeze, <I as Interner>::FreeTyAliasId: Freeze, <I as Interner>::UnevaluatedConstId: Freeze, <I as Interner>::TraitAssocConstId: Freeze, <I as Interner>::FreeConstAliasId: Freeze, <I as Interner>::InherentAssocConstId: Freeze,

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### impl<I> RefUnwindSafe for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: RefUnwindSafe, <I as Interner>::InherentAssocTyId: RefUnwindSafe, <I as Interner>::OpaqueTyId: RefUnwindSafe, <I as Interner>::FreeTyAliasId: RefUnwindSafe, <I as Interner>::UnevaluatedConstId: RefUnwindSafe, <I as Interner>::TraitAssocConstId: RefUnwindSafe, <I as Interner>::FreeConstAliasId: RefUnwindSafe, <I as Interner>::InherentAssocConstId: RefUnwindSafe,

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### impl<I> Send for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: Send, <I as Interner>::InherentAssocTyId: Send, <I as Interner>::OpaqueTyId: Send, <I as Interner>::FreeTyAliasId: Send, <I as Interner>::UnevaluatedConstId: Send, <I as Interner>::TraitAssocConstId: Send, <I as Interner>::FreeConstAliasId: Send, <I as Interner>::InherentAssocConstId: Send,

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### impl<I> Sync for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: Sync, <I as Interner>::InherentAssocTyId: Sync, <I as Interner>::OpaqueTyId: Sync, <I as Interner>::FreeTyAliasId: Sync, <I as Interner>::UnevaluatedConstId: Sync, <I as Interner>::TraitAssocConstId: Sync, <I as Interner>::FreeConstAliasId: Sync, <I as Interner>::InherentAssocConstId: Sync,

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### impl<I> Unpin for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: Unpin, <I as Interner>::InherentAssocTyId: Unpin, <I as Interner>::OpaqueTyId: Unpin, <I as Interner>::FreeTyAliasId: Unpin, <I as Interner>::UnevaluatedConstId: Unpin, <I as Interner>::TraitAssocConstId: Unpin, <I as Interner>::FreeConstAliasId: Unpin, <I as Interner>::InherentAssocConstId: Unpin,

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### impl<I> UnsafeUnpin for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: UnsafeUnpin, <I as Interner>::InherentAssocTyId: UnsafeUnpin, <I as Interner>::OpaqueTyId: UnsafeUnpin, <I as Interner>::FreeTyAliasId: UnsafeUnpin, <I as Interner>::UnevaluatedConstId: UnsafeUnpin, <I as Interner>::TraitAssocConstId: UnsafeUnpin, <I as Interner>::FreeConstAliasId: UnsafeUnpin, <I as Interner>::InherentAssocConstId: UnsafeUnpin,

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### impl<I> UnwindSafe for AliasTermKind<I>
where <I as Interner>::TraitAssocTyId: UnwindSafe, <I as Interner>::InherentAssocTyId: UnwindSafe, <I as Interner>::OpaqueTyId: UnwindSafe, <I as Interner>::FreeTyAliasId: UnwindSafe, <I as Interner>::UnevaluatedConstId: UnwindSafe, <I as Interner>::TraitAssocConstId: UnwindSafe, <I as Interner>::FreeConstAliasId: UnwindSafe, <I as Interner>::InherentAssocConstId: 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> AnyEq for T
where T: Any + PartialEq,

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#### fn equals(&self, other: &(dyn Any + 'static)) -> bool

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#### fn as_any(&self) -> &(dyn Any + 'static)

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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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, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
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### impl<T, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

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#### type Output = R

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### impl<'tcx, T> DepNodeKey<'tcx> for T
where T: StableHash + Debug,

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#### default fn key_fingerprint_style() -> KeyFingerprintStyle

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#### default fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

This method turns a query key into an opaque `Fingerprint` to be used in `DepNode`.
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#### default fn try_recover_key(_: TyCtxt<'tcx>, _: &DepNode) -> Option<T>

This method tries to recover the query key from the given `DepNode`, something which is needed when forcing `DepNode`s during red-green evaluation. The query system will only call this method if `fingerprint_style()` is not `FingerprintStyle::Opaque`. It is always valid to return `None` here, in which case incremental compilation will treat the query as having changed instead of forcing it.
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### impl<T> DynClone for T
where T: Clone,

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#### fn __clone_box(&self, _: Private) -> *mut ()

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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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#### fn from(t: T) -> T

Returns the argument unchanged.

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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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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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#### 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<K> IntoQueryKey<K> for K

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#### fn into_query_key(self) -> K

Argument conversion from `Self` to `K`. This should always be a very cheap conversion, e.g. `LocalDefId::to_def_id`.
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#### type Error = !

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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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Dereferences the given pointer. Read more
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Mutably dereferences 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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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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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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Performs the conversion.
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#### fn upcast(self, interner: I) -> U

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where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<T> ErasedDestructor for T
where T: 'static,

## 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.