Enum rustc_middle::ty::error::TypeError

pub enum TypeError<'tcx> {
    Mismatch,
    UnsafetyMismatch(ExpectedFound<Unsafety>),
    AbiMismatch(ExpectedFound<Abi>),
    Mutability,
    ArgumentMutability(usize),
    TupleSize(ExpectedFound<usize>),
    FixedArraySize(ExpectedFound<u64>),
    ArgCount,
    RegionsDoesNotOutlive(Region<'tcx>, Region<'tcx>),
    RegionsInsufficientlyPolymorphic(BoundRegionKind, Region<'tcx>),
    RegionsOverlyPolymorphic(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(&'tcx Const<'tcx>),
    ProjectionMismatched(ExpectedFound<DefId>),
    ExistentialMismatch(ExpectedFound<&'tcx List<Binder<'tcx, ExistentialPredicate<'tcx>>>>),
    ObjectUnsafeCoercion(DefId),
    ConstMismatch(ExpectedFound<&'tcx Const<'tcx>>),
    IntrinsicCast,
    TargetFeatureCast(DefId),
}

Variants

Mismatch

UnsafetyMismatch(ExpectedFound<Unsafety>)

AbiMismatch(ExpectedFound<Abi>)

Mutability

ArgumentMutability(usize)

TupleSize(ExpectedFound<usize>)

FixedArraySize(ExpectedFound<u64>)

ArgCount

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

RegionsInsufficientlyPolymorphic(BoundRegionKind, Region<'tcx>)

RegionsOverlyPolymorphic(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>)

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

CyclicConst(&'tcx Const<'tcx>)

ProjectionMismatched(ExpectedFound<DefId>)

ExistentialMismatch(ExpectedFound<&'tcx List<Binder<'tcx, ExistentialPredicate<'tcx>>>>)

ObjectUnsafeCoercion(DefId)

ConstMismatch(ExpectedFound<&'tcx Const<'tcx>>)

IntrinsicCast

TargetFeatureCast(DefId)

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

Implementations

impl<'tcx> TypeError<'tcx>

pub fn must_include_note(&self) -> bool

Trait Implementations

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for TypeError<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Display for 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.

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

Formats the value using the given formatter.

impl<'tcx> From<TypeError<'tcx>> for NoSolution

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

Performs the conversion.

impl<'a, 'tcx> Lift<'tcx> for TypeError<'a>

type Lifted = TypeError<'tcx>

fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted>

impl<'tcx> TypeFoldable<'tcx> for TypeError<'tcx>

fn super_fold_with<__F: TypeFolder<'tcx>>(self, __folder: &mut __F) -> Self

fn super_visit_with<__F: TypeVisitor<'tcx>>(
    &self,
    __folder: &mut __F
) -> ControlFlow<__F::BreakTy>

fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self

fn visit_with<V: TypeVisitor<'tcx>>(
    &self,
    visitor: &mut V
) -> ControlFlow<V::BreakTy>

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.

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

Returns true if this self has any regions that escape binder (and hence are not bound by it).

fn has_escaping_bound_vars(&self) -> bool

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

fn has_projections(&self) -> bool

fn has_opaque_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types_or_consts(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_infer_types_or_consts(&self) -> bool

fn needs_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn needs_subst(&self) -> bool

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.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

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.

fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

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.