Struct rustc_type_ir::predicate::ProjectionPredicate
source · pub struct ProjectionPredicate<I: Interner> {
pub projection_term: AliasTerm<I>,
pub term: I::Term,
}
Expand description
This kind of predicate has no direct correspondent in the syntax, but it roughly corresponds to the syntactic forms:
T: TraitRef<..., Item = Type>
<T as TraitRef<...>>::Item == Type
(NYI)
In particular, form #1 is “desugared” to the combination of a
normal trait predicate (T: TraitRef<...>
) and one of these
predicates. Form #2 is a broader form in that it also permits
equality between arbitrary types. Processing an instance of
Form #2 eventually yields one of these ProjectionPredicate
instances to normalize the LHS.
Fields§
§projection_term: AliasTerm<I>
§term: I::Term
Implementations§
source§impl<I: Interner> ProjectionPredicate<I>
impl<I: Interner> ProjectionPredicate<I>
pub fn self_ty(self) -> I::Ty
pub fn with_self_ty(self, interner: I, self_ty: I::Ty) -> ProjectionPredicate<I>
pub fn trait_def_id(self, interner: I) -> I::DefId
pub fn def_id(self) -> I::DefId
Trait Implementations§
source§impl<I> Clone for ProjectionPredicate<I>where
I: Interner,
impl<I> Clone for ProjectionPredicate<I>where
I: Interner,
source§impl<I: Interner> Debug for ProjectionPredicate<I>
impl<I: Interner> Debug for ProjectionPredicate<I>
source§impl<I: Interner> Display for ProjectionPredicate<I>
impl<I: Interner> Display for ProjectionPredicate<I>
source§impl<I> Hash for ProjectionPredicate<I>where
I: Interner,
impl<I> Hash for ProjectionPredicate<I>where
I: Interner,
source§impl<I: Interner, __CTX> HashStable<__CTX> for ProjectionPredicate<I>
impl<I: Interner, __CTX> HashStable<__CTX> for ProjectionPredicate<I>
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl<I, J> Lift<J> for ProjectionPredicate<I>
impl<I, J> Lift<J> for ProjectionPredicate<I>
type Lifted = ProjectionPredicate<J>
fn lift_to_interner(self, interner: J) -> Option<Self::Lifted>
source§impl<I> PartialEq for ProjectionPredicate<I>where
I: Interner,
impl<I> PartialEq for ProjectionPredicate<I>where
I: Interner,
source§impl<I> TypeFoldable<I> for ProjectionPredicate<I>
impl<I> TypeFoldable<I> for ProjectionPredicate<I>
source§fn try_fold_with<__F: FallibleTypeFolder<I>>(
self,
__folder: &mut __F,
) -> Result<Self, __F::Error>
fn try_fold_with<__F: FallibleTypeFolder<I>>( self, __folder: &mut __F, ) -> Result<Self, __F::Error>
source§fn fold_with<F: TypeFolder<I>>(self, folder: &mut F) -> Self
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 ProjectionPredicate<I>
impl<I> TypeVisitable<I> for ProjectionPredicate<I>
source§fn visit_with<__V: TypeVisitor<I>>(&self, __visitor: &mut __V) -> __V::Result
fn visit_with<__V: TypeVisitor<I>>(&self, __visitor: &mut __V) -> __V::Result
impl<I> Copy for ProjectionPredicate<I>where
I: Interner,
impl<I> Eq for ProjectionPredicate<I>where
I: Interner,
Auto Trait Implementations§
impl<I> Freeze for ProjectionPredicate<I>
impl<I> RefUnwindSafe for ProjectionPredicate<I>where
<I as Interner>::Term: RefUnwindSafe,
<I as Interner>::GenericArgs: RefUnwindSafe,
<I as Interner>::DefId: RefUnwindSafe,
impl<I> Send for ProjectionPredicate<I>
impl<I> Sync for ProjectionPredicate<I>
impl<I> Unpin for ProjectionPredicate<I>
impl<I> UnwindSafe for ProjectionPredicate<I>where
<I as Interner>::Term: UnwindSafe,
<I as Interner>::GenericArgs: UnwindSafe,
<I as Interner>::DefId: 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<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
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<I, T> TypeVisitableExt<I> for Twhere
I: Interner,
T: TypeVisitable<I>,
impl<I, T> TypeVisitableExt<I> for Twhere
I: Interner,
T: TypeVisitable<I>,
fn has_type_flags(&self, flags: TypeFlags) -> bool
source§fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> 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<(), <I as Interner>::ErrorGuaranteed>
source§fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
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
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 morefn 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
source§fn has_free_regions(&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
source§fn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
True if there are any un-erased free regions.
source§fn is_global(&self) -> bool
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
fn has_bound_regions(&self) -> bool
True if there are any late-bound regions
source§fn has_non_region_bound_vars(&self) -> bool
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
fn has_bound_vars(&self) -> bool
True if there are any bound variables
source§fn still_further_specializable(&self) -> bool
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 Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
source§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.