Enum rustc_middle::traits::CodegenObligationError

source ·

pub enum CodegenObligationError {
    Ambiguity,
    Unimplemented,
    FulfillmentError,
}

Expand description

These are the error cases for codegen_select_candidate.

Variants§

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Ambiguity

Ambiguity can happen when monomorphizing during trans expands to some humongous type that never occurred statically – this humongous type can then overflow, leading to an ambiguous result. So report this as an overflow bug, since I believe this is the only case where ambiguity can result.

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Unimplemented

This can trigger when we probe for the source of a 'static lifetime requirement on a trait object: impl Foo for dyn Trait {} has an implicit 'static bound. This can also trigger when we have a global bound that is not actually satisfied, but was included during typeck due to the trivial_bounds feature.

Enum rustc_middle::traits::CodegenObligationError

Variants§

Ambiguity

Unimplemented

FulfillmentError

Trait Implementations§

impl Clone for CodegenObligationError

fn clone(&self) -> CodegenObligationError

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

impl Debug for CodegenObligationError

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

impl<__D: Decoder> Decodable<__D> for CodegenObligationError

fn decode(__decoder: &mut __D) -> Self

impl<__E: Encoder> Encodable<__E> for CodegenObligationError

fn encode(&self, __encoder: &mut __E)

impl EraseType for CodegenObligationError

type Result = [u8; 1]

impl Hash for CodegenObligationError

fn hash<__H: Hasher>(&self, state: &mut __H)

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for CodegenObligationError

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher )

impl Copy for CodegenObligationError

Auto Trait Implementations§

impl RefUnwindSafe for CodegenObligationError

impl Send for CodegenObligationError

impl Sync for CodegenObligationError

impl Unpin for CodegenObligationError

impl UnwindSafe for CodegenObligationError

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment = _

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

fn type_id(&self) -> TypeId

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

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

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

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

default fn fingerprint_style() -> FingerprintStyle

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

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

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

type Owned = T

fn to_owned(&self) -> T

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

impl<'tcx, T> ToPredicate<'tcx, T> for T

fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> 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<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

default fn from_cycle_error( tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> T

Layout§

impl<D: Decoder> Decodable<D> for CodegenObligationError

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

impl<E: Encoder> Encodable<E> for CodegenObligationError

fn encode(&self, encoder: &mut E)

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

impl<'ctx> HashStable<StableHashingContext<'ctx>> for CodegenObligationError

fn hash_stable( &self, hcx: &mut StableHashingContext<'ctx>, __hasher: &mut StableHasher )