Enum rustc_middle::ty::error::TypeError

pub enum TypeError<'tcx> {
    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

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>)

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

CyclicConst(Const<'tcx>)

ProjectionMismatched(ExpectedFound<DefId>)

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

ConstMismatch(ExpectedFound<Const<'tcx>>)

IntrinsicCast

TargetFeatureCast(DefId)

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

Implementations

impl TypeError<'_>

pub fn involves_regions(self) -> bool

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.

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

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.

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> From<TypeError<'tcx>> for NoSolution

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

Converts to this type from the input type.

impl<'tcx> PartialEq<TypeError<'tcx>> for TypeError<'tcx>

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

This method tests for self and other values to be equal, and is used by ==.

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.

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

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).

impl<'tcx> Copy for TypeError<'tcx>

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

impl<'tcx> StructuralEq for TypeError<'tcx>

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

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: 31 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