Enum rustc_trait_selection::infer::SubregionOrigin

source ·
pub enum SubregionOrigin<'tcx> {
    Subtype(Box<TypeTrace<'tcx>>),
    RelateObjectBound(Span),
    RelateParamBound(Span, Ty<'tcx>, Option<Span>),
    RelateRegionParamBound(Span, Option<Ty<'tcx>>),
    Reborrow(Span),
    ReferenceOutlivesReferent(Ty<'tcx>, Span),
    CompareImplItemObligation {
        span: Span,
        impl_item_def_id: LocalDefId,
        trait_item_def_id: DefId,
    },
    CheckAssociatedTypeBounds {
        parent: Box<SubregionOrigin<'tcx>>,
        impl_item_def_id: LocalDefId,
        trait_item_def_id: DefId,
    },
    AscribeUserTypeProvePredicate(Span),
}
Expand description

The origin of a r1 <= r2 constraint.

See error_reporting module for more details

Variants§

§

Subtype(Box<TypeTrace<'tcx>>)

Arose from a subtyping relation

§

RelateObjectBound(Span)

When casting &'a T to an &'b Trait object, relating 'a to 'b.

§

RelateParamBound(Span, Ty<'tcx>, Option<Span>)

Some type parameter was instantiated with the given type, and that type must outlive some region.

§

RelateRegionParamBound(Span, Option<Ty<'tcx>>)

The given region parameter was instantiated with a region that must outlive some other region.

§

Reborrow(Span)

Creating a pointer b to contents of another reference.

§

ReferenceOutlivesReferent(Ty<'tcx>, Span)

(&’a &’b T) where a >= b

§

CompareImplItemObligation

Comparing the signature and requirements of an impl method against the containing trait.

Fields

§span: Span
§impl_item_def_id: LocalDefId
§trait_item_def_id: DefId
§

CheckAssociatedTypeBounds

Checking that the bounds of a trait’s associated type hold for a given impl.

Fields

§parent: Box<SubregionOrigin<'tcx>>
§impl_item_def_id: LocalDefId
§trait_item_def_id: DefId
§

AscribeUserTypeProvePredicate(Span)

Implementations§

source§

impl<'tcx> SubregionOrigin<'tcx>

source§

impl<'tcx> SubregionOrigin<'tcx>

source

pub fn span(&self) -> Span

source

pub fn from_obligation_cause<F>( cause: &ObligationCause<'tcx>, default: F, ) -> SubregionOrigin<'tcx>
where F: FnOnce() -> SubregionOrigin<'tcx>,

Trait Implementations§

source§

impl<'tcx> Clone for SubregionOrigin<'tcx>

source§

fn clone(&self) -> SubregionOrigin<'tcx>

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<'tcx> Debug for SubregionOrigin<'tcx>

source§

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl<'tcx> Freeze for SubregionOrigin<'tcx>

§

impl<'tcx> !RefUnwindSafe for SubregionOrigin<'tcx>

§

impl<'tcx> !Send for SubregionOrigin<'tcx>

§

impl<'tcx> !Sync for SubregionOrigin<'tcx>

§

impl<'tcx> Unpin for SubregionOrigin<'tcx>

§

impl<'tcx> !UnwindSafe for SubregionOrigin<'tcx>

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> CloneToUninit for T
where T: Clone,

source§

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

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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<_>>()).

source§

type Output = R

source§

impl<T> Filterable for T

source§

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
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<P> IntoQueryParam<P> for P

source§

impl<T> MaybeResult<T> for T

source§

type Error = !

source§

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

source§

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

source§

impl<T> Same for T

source§

type Output = T

Should always be Self
source§

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

source§

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

source§

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>,

source§

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

source§

fn vzip(self) -> V

source§

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

source§

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

source§

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

source§

impl<T> MaybeSendSync for T

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

  • Subtype: 12 bytes
  • RelateObjectBound: 8 bytes
  • RelateParamBound: 28 bytes
  • RelateRegionParamBound: 20 bytes
  • Reborrow: 8 bytes
  • ReferenceOutlivesReferent: 20 bytes
  • CompareImplItemObligation: 20 bytes
  • CheckAssociatedTypeBounds: 20 bytes
  • AscribeUserTypeProvePredicate: 8 bytes