Struct rustc_type_ir::predicate::AliasTerm

source ·
pub struct AliasTerm<I: Interner> {
    pub args: I::GenericArgs,
    pub def_id: I::DefId,
    _use_alias_term_new_instead: (),
}
Expand description

Represents the unprojected term of a projection goal.

  • For a projection, this would be <Ty as Trait<...>>::N<...>.
  • For an inherent projection, this would be Ty::N<...>.
  • For an opaque type, there is no explicit syntax.

Fields§

§args: I::GenericArgs

The parameters of the associated or opaque item.

For a projection, these are the generic parameters for the trait and the GAT parameters, if there are any.

For an inherent projection, they consist of the self type and the GAT parameters, if there are any.

For RPIT the generic parameters are for the generics of the function, while for TAIT it is used for the generic parameters of the alias.

§def_id: I::DefId

The DefId of the TraitItem or ImplItem for the associated type N depending on whether this is a projection or an inherent projection or the DefId of the OpaqueType item if this is an opaque.

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

Note that if this is an associated type, this 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).

§_use_alias_term_new_instead: ()

This field exists to prevent the creation of AliasTerm without using AliasTerm::new.

Implementations§

source§

impl<I: Interner> AliasTerm<I>

source

pub fn new( interner: I, def_id: I::DefId, args: impl IntoIterator<Item: Into<I::GenericArg>>, ) -> AliasTerm<I>

source

pub fn expect_ty(self, interner: I) -> AliasTy<I>

source

pub fn kind(self, interner: I) -> AliasTermKind

source

pub fn to_term(self, interner: I) -> I::Term

source§

impl<I: Interner> AliasTerm<I>

The following methods work only with (trait) associated type projections.

source

pub fn self_ty(self) -> I::Ty

source

pub fn with_self_ty(self, interner: I, self_ty: I::Ty) -> Self

source

pub fn trait_def_id(self, interner: I) -> I::DefId

source

pub fn trait_ref_and_own_args( self, interner: I, ) -> (TraitRef<I>, I::GenericArgsSlice)

Extracts the underlying trait reference and own args from this projection. For example, if this is a projection of <T as StreamingIterator>::Item<'a>, then this function would return a T: StreamingIterator trait reference and ['a] as the own args.

source

pub fn trait_ref(self, interner: I) -> TraitRef<I>

Extracts the underlying trait reference from this projection. For example, if this is a projection of <T as Iterator>::Item, then this function would return a T: Iterator trait reference.

WARNING: This will drop the args for generic associated types consider calling Self::trait_ref_and_own_args to get those as well.

Trait Implementations§

source§

impl<I: Interner> Clone for AliasTerm<I>

source§

fn clone(&self) -> Self

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
source§

impl<I: Interner> Debug for AliasTerm<I>

source§

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

Formats the value using the given formatter. Read more
source§

impl<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for AliasTerm<I>
where I::GenericArgs: Decodable<__D>, I::DefId: Decodable<__D>,

source§

fn decode(__decoder: &mut __D) -> Self

source§

impl<I: Interner> Display for AliasTerm<I>

source§

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

Formats the value using the given formatter. Read more
source§

impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for AliasTerm<I>
where I::GenericArgs: Encodable<__E>, I::DefId: Encodable<__E>,

source§

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

source§

impl<I: Interner> From<AliasTy<I>> for AliasTerm<I>

source§

fn from(ty: AliasTy<I>) -> Self

Converts to this type from the input type.
source§

impl<I: Interner> From<UnevaluatedConst<I>> for AliasTerm<I>

source§

fn from(ct: UnevaluatedConst<I>) -> Self

Converts to this type from the input type.
source§

impl<I: Interner> Hash for AliasTerm<I>

source§

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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
source§

impl<I: Interner, __CTX> HashStable<__CTX> for AliasTerm<I>
where I::GenericArgs: HashStable<__CTX>, I::DefId: HashStable<__CTX>,

source§

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

source§

impl<I, J> Lift<J> for AliasTerm<I>
where I: Interner, J: Interner, I::GenericArgs: Lift<J, Lifted = J::GenericArgs>, I::DefId: Lift<J, Lifted = J::DefId>, (): Lift<J, Lifted = ()>,

§

type Lifted = AliasTerm<J>

source§

fn lift_to_tcx(self, interner: J) -> Option<Self::Lifted>

source§

impl<I: Interner> PartialEq for AliasTerm<I>

source§

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl<I: Interner> Relate<I> for AliasTerm<I>

source§

fn relate<R: TypeRelation<I>>( relation: &mut R, a: AliasTerm<I>, b: AliasTerm<I>, ) -> RelateResult<I, AliasTerm<I>>

source§

impl<I> TypeFoldable<I> for AliasTerm<I>

source§

fn try_fold_with<__F: FallibleTypeFolder<I>>( self, __folder: &mut __F, ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f). Read more
source§

fn fold_with<F: TypeFolder<I>>(self, folder: &mut F) -> Self

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.
source§

impl<I> TypeVisitable<I> for AliasTerm<I>

source§

fn visit_with<__V: TypeVisitor<I>>(&self, __visitor: &mut __V) -> __V::Result

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v). Read more
source§

impl<I: Interner> Copy for AliasTerm<I>

source§

impl<I: Interner> Eq for AliasTerm<I>

Auto Trait Implementations§

§

impl<I> DynSend for AliasTerm<I>
where <I as Interner>::GenericArgs: DynSend, <I as Interner>::DefId: DynSend,

§

impl<I> DynSync for AliasTerm<I>
where <I as Interner>::GenericArgs: DynSync, <I as Interner>::DefId: DynSync,

§

impl<I> Freeze for AliasTerm<I>
where <I as Interner>::GenericArgs: Freeze, <I as Interner>::DefId: Freeze,

§

impl<I> RefUnwindSafe for AliasTerm<I>

§

impl<I> Send for AliasTerm<I>
where <I as Interner>::GenericArgs: Send, <I as Interner>::DefId: Send,

§

impl<I> Sync for AliasTerm<I>
where <I as Interner>::GenericArgs: Sync, <I as Interner>::DefId: Sync,

§

impl<I> Unpin for AliasTerm<I>
where <I as Interner>::GenericArgs: Unpin, <I as Interner>::DefId: Unpin,

§

impl<I> UnwindSafe for AliasTerm<I>

Blanket Implementations§

source§

impl<T> Aligned for T

source§

const ALIGN: Alignment = _

Alignment of Self.
source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T, R> CollectAndApply<T, R> for T

source§

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<_>>()).

§

type Output = R

source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

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

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

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

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

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

Compare self to key and return true if they are equal.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

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

source§

impl<T> IntoEither for T

source§

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
source§

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
source§

impl<T> Pointable for T

source§

const ALIGN: usize = _

The alignment of pointer.
§

type Init = T

The type for initializers.
source§

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T> ToString for T
where T: Display + ?Sized,

source§

default fn to_string(&self) -> String

Converts the given value to a String. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<I, T> TypeVisitableExt<I> for T
where I: Interner, T: TypeVisitable<I>,

source§

fn has_type_flags(&self, flags: TypeFlags) -> bool

source§

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free.
source§

fn error_reported(&self) -> Result<(), <I as Interner>::ErrorGuaranteed>

source§

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this type has any regions that escape binder (and hence are not bound by it).
source§

fn has_escaping_bound_vars(&self) -> bool

Return true if this type has regions that are not a part of the type. For example, for<'a> fn(&'a i32) return false, while fn(&'a i32) would return true. The latter can occur when traversing through the former. Read more
source§

fn has_aliases(&self) -> bool

source§

fn has_inherent_projections(&self) -> bool

source§

fn has_opaque_types(&self) -> bool

source§

fn has_coroutines(&self) -> bool

source§

fn references_error(&self) -> bool

source§

fn has_non_region_param(&self) -> bool

source§

fn has_infer_regions(&self) -> bool

source§

fn has_infer_types(&self) -> bool

source§

fn has_non_region_infer(&self) -> bool

source§

fn has_infer(&self) -> bool

source§

fn has_placeholders(&self) -> bool

source§

fn has_non_region_placeholders(&self) -> bool

source§

fn has_param(&self) -> bool

source§

fn has_free_regions(&self) -> bool

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound.
source§

fn has_erased_regions(&self) -> bool

source§

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.
source§

fn is_global(&self) -> bool

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching.
source§

fn has_bound_regions(&self) -> bool

True if there are any late-bound regions
source§

fn has_non_region_bound_vars(&self) -> bool

True if there are any late-bound non-region variables
source§

fn has_bound_vars(&self) -> bool

True if there are any bound variables
source§

fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.
source§

impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

source§

fn upcast(self, interner: I) -> U

source§

impl<I, T> UpcastFrom<I, T> for T

source§

fn upcast_from(from: T, _tcx: I) -> T

source§

impl<T> WithSubscriber for T

source§

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
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

impl<'a, T> Captures<'a> for T
where 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.