Struct ExistentialTraitRef Copy item path

impl ExistentialTraitRef
where I: Interner,

pub fn new_from_args( interner: I, trait_def_id: ::DefId, args: ::GenericArgs, ) -> ExistentialTraitRef

pub fn new( interner: I, trait_def_id: ::DefId, args: impl IntoIterator>, ) -> ExistentialTraitRef
where <impl IntoIterator as IntoIterator>::Item: Into<::GenericArg>,

pub fn erase_self_ty( interner: I, trait_ref: TraitRef, ) -> ExistentialTraitRef

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

Object types don’t have a self type specified. Therefore, when we convert the principal trait-ref into a normal trait-ref, you must give some self type. A common choice is mk_err() or some placeholder type.

Trait Implementations§

impl Clone for ExistentialTraitRef
where I: Interner,

fn clone(&self) -> ExistentialTraitRef

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

impl Debug for ExistentialTraitRef
where I: Interner,

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

Formats the value using the given formatter. Read more

impl<I, D> Decodable<D> for ExistentialTraitRef
where I: Interner, D: TyDecoder, ::DefId: Decodable<D>, ::GenericArgs: Decodable<__D>,

fn decode(decoder: &mut D) -> ExistentialTraitRef

impl Display for ExistentialTraitRef
where I: Interner,

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

Formats the value using the given formatter. Read more

impl<I, E> Encodable<E> for ExistentialTraitRef
where I: Interner, E: TyEncoder, ::DefId: Encodable<E>, ::GenericArgs: Encodable<__E>,

fn hash<H>(&self, state: &mut H)
where H: 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

impl<I, CTX> HashStable<CTX> for ExistentialTraitRef
where I: Interner, ::DefId: HashStable<CTX>, ::GenericArgs: HashStable<CTX>,

fn hash_stable( &self, hcx: &mut CTX, __hasher: &mut StableHasher<SipHasher128>, )

impl IntoDiagArg for ExistentialTraitRef
where I: Interner,

fn into_diag_arg(self) -> DiagArgValue

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

type Lifted = ExistentialTraitRef<J>

fn lift_to_interner(self, interner: J) -> Option<ExistentialTraitRef<J>>

impl PartialEq for ExistentialTraitRef
where I: Interner,

fn eq(&self, __other: &ExistentialTraitRef) -> bool

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx, P> Print<'tcx, P> for ExistentialTraitRef<TyCtxt<'tcx>>
where P: PrettyPrinter<'tcx>,

fn print(&self, cx: &mut P) -> Result<(), Error>

impl Relate for ExistentialTraitRef
where I: Interner,

fn relate<R>( relation: &mut R, a: ExistentialTraitRef, b: ExistentialTraitRef, ) -> Result<ExistentialTraitRef, TypeError>
where R: TypeRelation,

impl TypeFoldable for ExistentialTraitRef
where I: Interner, ::DefId: TypeFoldable, ::GenericArgs: TypeFoldable,

fn try_fold_with<F>( self, folder: &mut F, ) -> Result<ExistentialTraitRef, <F as FallibleTypeFolder>::Error>
where __F: FallibleTypeFolder,

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

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

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

impl TypeVisitable for ExistentialTraitRef
where I: Interner, ::DefId: TypeVisitable, ::GenericArgs: TypeVisitable,

fn visit_with<V>( &self, visitor: &mut V, ) -> <V as TypeVisitor>::Result
where __V: TypeVisitor,

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

impl Copy for ExistentialTraitRef
where I: Interner,

impl Eq for ExistentialTraitRef
where I: Interner,

Auto Trait Implementations§

impl DynSend for ExistentialTraitRef
where ::DefId: DynSend, ::GenericArgs: DynSend,

impl DynSync for ExistentialTraitRef
where ::DefId: DynSync, ::GenericArgs: DynSync,

impl Freeze for ExistentialTraitRef
where ::DefId: Freeze, ::GenericArgs: Freeze,

impl RefUnwindSafe for ExistentialTraitRef
where ::DefId: RefUnwindSafe, ::GenericArgs: RefUnwindSafe,

impl Send for ExistentialTraitRef
where ::DefId: Send, ::GenericArgs: Send,

impl Sync for ExistentialTraitRef
where ::DefId: Sync, ::GenericArgs: Sync,

impl Unpin for ExistentialTraitRef
where ::DefId: Unpin, ::GenericArgs: Unpin,

impl UnwindSafe for ExistentialTraitRef
where ::DefId: UnwindSafe, ::GenericArgs: UnwindSafe,

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment

Alignment of Self.

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> AnyEq for T
where T: Any + PartialEq,

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

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

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

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

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

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

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

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

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

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

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

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

impl<Tcx, T> DepNodeParams<Tcx> for T
where Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

default fn fingerprint_style() -> FingerprintStyle

default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous).

default fn to_debug_str(&self, _: Tcx) -> String

default fn recover(_: Tcx, _: &DepNode) -> Option<T>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes 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.

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

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

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

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

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

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

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

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

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

impl<T> Filterable for T

fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

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

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

fn in_current_span(self) -> Instrumented<Self>

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

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

fn into(self) -> U

Calls U::from(self).

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

impl<T> IntoEither for T

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

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

impl IntoQueryParam for P

fn into_query_param(self) -> P

impl<'tcx, T> IsSuggestable<'tcx> for T
where T: TypeVisitable<TyCtxt<'tcx>> + TypeFoldable<TyCtxt<'tcx>>,

fn is_suggestable(self, tcx: TyCtxt<'tcx>, infer_suggestable: bool) -> bool

Whether this makes sense to suggest in a diagnostic. Read more

fn make_suggestable( self, tcx: TyCtxt<'tcx>, infer_suggestable: bool, placeholder: Option<Ty<'tcx>>, ) -> Option<T>

impl<T> MaybeResult<T> for T

type Error = !

fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

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

Initializes a with the given initializer. Read more

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

Dereferences the given pointer. Read more

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

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

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

impl<T> Same for T

type Output = T

Should always be Self

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

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

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

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

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

fn to_string(&self) -> String

Converts the given value to a String. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

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

Performs the conversion.

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

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

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.

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

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).

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

fn has_aliases(&self) -> bool

fn has_opaque_types(&self) -> bool

fn has_coroutines(&self) -> bool

fn references_error(&self) -> bool

fn has_non_region_param(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_non_region_infer(&self) -> bool

fn has_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn has_non_region_placeholders(&self) -> bool

fn has_param(&self) -> bool

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.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

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.

fn has_bound_regions(&self) -> bool

True if there are any late-bound regions

fn has_non_region_bound_vars(&self) -> bool

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

fn has_bound_vars(&self) -> bool

True if there are any bound variables

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.

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

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

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

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

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V

impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

impl<T> WithSubscriber for T

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

fn with_current_subscriber(self) -> WithDispatch<Self>

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

impl<'a, T> Captures<'a> for T
where T: ?Sized,

impl<T> ErasedDestructor for T
where T: 'static,