Enum rustc_trait_selection::traits::SelectionError

source ·

pub enum SelectionError<'tcx> {
    Unimplemented,
    SignatureMismatch(Box<SignatureMismatchData<'tcx>>),
    TraitNotObjectSafe(DefId),
    NotConstEvaluatable(NotConstEvaluatable),
    Overflow(OverflowError),
    OpaqueTypeAutoTraitLeakageUnknown(DefId),
    ConstArgHasWrongType {
        ct: Const<'tcx>,
        ct_ty: Ty<'tcx>,
        expected_ty: Ty<'tcx>,
    },
}

Variants§

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Unimplemented

The trait is not implemented.

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SignatureMismatch(Box<SignatureMismatchData<'tcx>>)

After a closure impl has selected, its “outputs” were evaluated (which for closures includes the “input” type params) and they didn’t resolve. See confirm_poly_trait_refs for more.

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TraitNotObjectSafe(DefId)

The trait pointed by DefId is not object safe.

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NotConstEvaluatable(NotConstEvaluatable)

A given constant couldn’t be evaluated.

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Overflow(OverflowError)

Exceeded the recursion depth during type projection.

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OpaqueTypeAutoTraitLeakageUnknown(DefId)

Computing an opaque type’s hidden type caused an error (e.g. a cycle error). We can thus not know whether the hidden type implements an auto trait, so we should not presume anything about it.

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ConstArgHasWrongType

Error for a ConstArgHasType goal

Fields

§ct: Const<'tcx>

§ct_ty: Ty<'tcx>

§expected_ty: Ty<'tcx>

Enum rustc_trait_selection::traits::SelectionErrorCopy item path

Variants§

Unimplemented

SignatureMismatch(Box<SignatureMismatchData<'tcx>>)

TraitNotObjectSafe(DefId)

NotConstEvaluatable(NotConstEvaluatable)

Overflow(OverflowError)

OpaqueTypeAutoTraitLeakageUnknown(DefId)

ConstArgHasWrongType

Fields

Trait Implementations§

impl<'tcx> Clone for SelectionError<'tcx>

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

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

impl<'tcx> Debug for SelectionError<'tcx>

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

impl<'tcx> From<OverflowError> for SelectionError<'tcx>

fn from(overflow_error: OverflowError) -> SelectionError<'tcx>

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for SelectionError<'tcx>

fn visit_with<__V>( &self, __visitor: &mut __V, ) -> <__V as TypeVisitor<TyCtxt<'tcx>>>::Resultwhere __V: TypeVisitor<TyCtxt<'tcx>>,

Auto Trait Implementations§

impl<'tcx> Freeze for SelectionError<'tcx>

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

impl<'tcx> Send for SelectionError<'tcx>

impl<'tcx> Sync for SelectionError<'tcx>

impl<'tcx> Unpin for SelectionError<'tcx>

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

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment = _

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> CloneToUninit for Twhere T: Clone,

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

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

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

type Output = R

impl<T> Filterable for T

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

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

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

fn in_current_span(self) -> Instrumented<Self>

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

fn into(self) -> U

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

impl<P> IntoQueryParam<P> for P

fn into_query_param(self) -> P

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> Same for T

type Output = T

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

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

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

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

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

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

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

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

fn has_escaping_bound_vars(&self) -> bool

fn has_aliases(&self) -> bool

fn has_opaque_types(&self) -> bool

fn has_coroutines(&self) -> bool

Enum rustc_trait_selection::traits::SelectionError

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

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

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

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

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

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

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

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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

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

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

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

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

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

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

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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

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