pub enum TypeError<'tcx> {
Show 27 variants Mismatch, ConstnessMismatch(ExpectedFound<BoundConstness>), PolarityMismatch(ExpectedFound<ImplPolarity>), UnsafetyMismatch(ExpectedFound<Unsafety>), AbiMismatch(ExpectedFound<Abi>), Mutability, ArgumentMutability(usize), TupleSize(ExpectedFound<usize>), FixedArraySize(ExpectedFound<u64>), ArgCount, FieldMisMatch(Symbol, Symbol), RegionsDoesNotOutlive(Region<'tcx>, Region<'tcx>), RegionsInsufficientlyPolymorphic(BoundRegionKind, Region<'tcx>), RegionsPlaceholderMismatch, Sorts(ExpectedFound<Ty<'tcx>>), ArgumentSorts(ExpectedFound<Ty<'tcx>>, usize), IntMismatch(ExpectedFound<IntVarValue>), FloatMismatch(ExpectedFound<FloatTy>), Traits(ExpectedFound<DefId>), VariadicMismatch(ExpectedFound<bool>), CyclicTy(Ty<'tcx>), CyclicConst(Const<'tcx>), ProjectionMismatched(ExpectedFound<DefId>), ExistentialMismatch(ExpectedFound<&'tcx List<PolyExistentialPredicate<'tcx>>>), ConstMismatch(ExpectedFound<Const<'tcx>>), IntrinsicCast, TargetFeatureCast(DefId),
}

Variants§

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Mismatch

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ConstnessMismatch(ExpectedFound<BoundConstness>)

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PolarityMismatch(ExpectedFound<ImplPolarity>)

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UnsafetyMismatch(ExpectedFound<Unsafety>)

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AbiMismatch(ExpectedFound<Abi>)

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Mutability

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ArgumentMutability(usize)

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TupleSize(ExpectedFound<usize>)

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FixedArraySize(ExpectedFound<u64>)

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ArgCount

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FieldMisMatch(Symbol, Symbol)

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RegionsDoesNotOutlive(Region<'tcx>, Region<'tcx>)

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RegionsInsufficientlyPolymorphic(BoundRegionKind, Region<'tcx>)

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RegionsPlaceholderMismatch

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Sorts(ExpectedFound<Ty<'tcx>>)

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ArgumentSorts(ExpectedFound<Ty<'tcx>>, usize)

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IntMismatch(ExpectedFound<IntVarValue>)

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FloatMismatch(ExpectedFound<FloatTy>)

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Traits(ExpectedFound<DefId>)

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VariadicMismatch(ExpectedFound<bool>)

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CyclicTy(Ty<'tcx>)

Instantiating a type variable with the given type would have created a cycle (because it appears somewhere within that type).

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CyclicConst(Const<'tcx>)

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ProjectionMismatched(ExpectedFound<DefId>)

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ExistentialMismatch(ExpectedFound<&'tcx List<PolyExistentialPredicate<'tcx>>>)

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ConstMismatch(ExpectedFound<Const<'tcx>>)

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IntrinsicCast

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TargetFeatureCast(DefId)

Safe #[target_feature] functions are not assignable to safe function pointers.

Implementations§

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impl TypeError<'_>

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impl<'tcx> TypeError<'tcx>

Explains the source of a type err in a short, human readable way. This is meant to be placed in parentheses after some larger message. You should also invoke note_and_explain_type_err() afterwards to present additional details, particularly when it comes to lifetime-related errors.

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pub fn to_string(self, tcx: TyCtxt<'tcx>) -> Cow<'static, str>

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impl<'tcx> TypeError<'tcx>

Trait Implementations§

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impl<'tcx> Clone for TypeError<'tcx>

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

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx> Debug for TypeError<'tcx>

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

Formats the value using the given formatter. Read more
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impl<'tcx> From<TypeError<'tcx>> for NoSolution

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fn from(_: TypeError<'tcx>) -> NoSolution

Converts to this type from the input type.
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impl<'tcx> PartialEq for TypeError<'tcx>

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fn eq(&self, other: &TypeError<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for TypeError<'tcx>

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

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v). Read more
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impl<'tcx> Copy for TypeError<'tcx>

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impl<'tcx> Eq for TypeError<'tcx>

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impl<'tcx> StructuralPartialEq for TypeError<'tcx>

Auto Trait Implementations§

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impl<'tcx> DynSend for TypeError<'tcx>

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impl<'tcx> DynSync for TypeError<'tcx>

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

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impl<'tcx> Send for TypeError<'tcx>

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impl<'tcx> Sync for TypeError<'tcx>

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impl<'tcx> Unpin for TypeError<'tcx>

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

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AnyEq for T
where T: Any + PartialEq,

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fn equals(&self, other: &(dyn Any + 'static)) -> bool

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fn as_any(&self) -> &(dyn Any + 'static)

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

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

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

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

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

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

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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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<_>>()).

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type Output = R

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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> Filterable for T

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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
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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

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

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<I, T> TypeVisitableExt<I> for T
where I: Interner, T: TypeVisitable<I>,

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

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

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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).
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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 more
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fn has_projections(&self) -> bool

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fn has_inherent_projections(&self) -> bool

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fn has_opaque_types(&self) -> bool

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fn has_coroutines(&self) -> bool

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fn references_error(&self) -> bool

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fn has_non_region_param(&self) -> bool

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fn has_infer_regions(&self) -> bool

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fn has_infer_types(&self) -> bool

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fn has_non_region_infer(&self) -> bool

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fn has_infer(&self) -> bool

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fn has_placeholders(&self) -> bool

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fn has_non_region_placeholders(&self) -> bool

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fn has_param(&self) -> bool

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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.
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fn has_erased_regions(&self) -> bool

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fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.
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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.
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fn has_bound_regions(&self) -> bool

True if there are any late-bound regions
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fn has_non_region_bound_vars(&self) -> bool

True if there are any late-bound non-region variables
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fn has_bound_vars(&self) -> bool

True if there are any bound variables
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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.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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

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

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impl<T> WithSubscriber for T

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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
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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

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impl<T> MaybeSendSync for T
where T: Send + Sync,

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:

  • Mismatch: 0 bytes
  • ConstnessMismatch: 2 bytes
  • PolarityMismatch: 2 bytes
  • UnsafetyMismatch: 2 bytes
  • AbiMismatch: 4 bytes
  • Mutability: 0 bytes
  • ArgumentMutability: 15 bytes
  • TupleSize: 23 bytes
  • FixedArraySize: 23 bytes
  • ArgCount: 0 bytes
  • FieldMisMatch: 11 bytes
  • RegionsDoesNotOutlive: 23 bytes
  • RegionsInsufficientlyPolymorphic: 23 bytes
  • RegionsPlaceholderMismatch: 0 bytes
  • Sorts: 23 bytes
  • ArgumentSorts: 31 bytes
  • IntMismatch: 4 bytes
  • FloatMismatch: 2 bytes
  • Traits: 19 bytes
  • VariadicMismatch: 2 bytes
  • CyclicTy: 15 bytes
  • CyclicConst: 15 bytes
  • ProjectionMismatched: 19 bytes
  • ExistentialMismatch: 23 bytes
  • ConstMismatch: 23 bytes
  • IntrinsicCast: 0 bytes
  • TargetFeatureCast: 11 bytes