Enum rustc_trait_selection::traits::SelectionError

source ·

pub enum SelectionError<'tcx> {
    Unimplemented,
    OutputTypeParameterMismatch(Box<SelectionOutputTypeParameterMismatch<'tcx>, Global>),
    TraitNotObjectSafe(DefId),
    NotConstEvaluatable(NotConstEvaluatable),
    Overflow(OverflowError),
    ErrorReporting,
    OpaqueTypeAutoTraitLeakageUnknown(DefId),
}

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Unimplemented

The trait is not implemented.

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OutputTypeParameterMismatch(Box<SelectionOutputTypeParameterMismatch<'tcx>, Global>)

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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ErrorReporting

Signaling that an error has already been emitted, to avoid multiple errors being shown.

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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.

Auto Trait Implementations§

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Enum rustc_trait_selection::traits::SelectionError

Variants§

Unimplemented

OutputTypeParameterMismatch(Box<SelectionOutputTypeParameterMismatch<'tcx>, Global>)

TraitNotObjectSafe(DefId)

NotConstEvaluatable(NotConstEvaluatable)

Overflow(OverflowError)

ErrorReporting

OpaqueTypeAutoTraitLeakageUnknown(DefId)

Auto Trait Implementations§

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> 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> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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>

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