Trait rustc_middle::ty::fold::TypeFoldable

pub trait TypeFoldable<'tcx>: TypeVisitable<'tcx> {
    fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
        self,
        folder: &mut F
    ) -> Result<Self, F::Error>;

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

This trait is implemented for every type that can be folded, providing the skeleton of the traversal.

To implement this conveniently, use the derive macro located in rustc_macros.

Required Methods

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<Self, F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

For most types, this just traverses the value, calling try_fold_with on each field/element.

For types of interest (such as Ty), the implementation of method calls a folder method specifically for that type (such as F::try_fold_ty). This is where control transfers from TypeFoldable to TypeFolder.

Provided Methods

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

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

Implementations on Foreign Types

impl<'tcx> TypeFoldable<'tcx> for Movability

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Movability, F::Error>

impl<'tcx> TypeFoldable<'tcx> for GeneratorKind

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<GeneratorKind, F::Error>

impl<'tcx> TypeFoldable<'tcx> for &'tcx [InlineAsmTemplatePiece]

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _folder: &mut F
) -> Result<Self, F::Error>

impl<'tcx> TypeFoldable<'tcx> for &'tcx [Span]

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _folder: &mut F
) -> Result<Self, F::Error>

impl<'tcx, R: Idx, C: Idx> TypeFoldable<'tcx> for BitMatrix<R, C>

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Self, F::Error>

impl<'tcx> TypeFoldable<'tcx> for ()

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<(), F::Error>

impl<'tcx> TypeFoldable<'tcx> for bool

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<bool, F::Error>

impl<'tcx> TypeFoldable<'tcx> for usize

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<usize, F::Error>

impl<'tcx> TypeFoldable<'tcx> for VariantIdx

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<VariantIdx, F::Error>

impl<'tcx> TypeFoldable<'tcx> for u32

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<u32, F::Error>

impl<'tcx> TypeFoldable<'tcx> for u64

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<u64, F::Error>

impl<'tcx> TypeFoldable<'tcx> for String

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<String, F::Error>

impl<'tcx> TypeFoldable<'tcx> for InlineAsmOptions

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<InlineAsmOptions, F::Error>

impl<'tcx> TypeFoldable<'tcx> for InlineAsmTemplatePiece

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<InlineAsmTemplatePiece, F::Error>

impl<'tcx> TypeFoldable<'tcx> for NodeId

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<NodeId, F::Error>

impl<'tcx> TypeFoldable<'tcx> for Symbol

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Symbol, F::Error>

impl<'tcx> TypeFoldable<'tcx> for Res

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Res, F::Error>

impl<'tcx> TypeFoldable<'tcx> for DefId

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<DefId, F::Error>

impl<'tcx> TypeFoldable<'tcx> for LocalDefId

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<LocalDefId, F::Error>

impl<'tcx> TypeFoldable<'tcx> for HirId

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<HirId, F::Error>

impl<'tcx> TypeFoldable<'tcx> for MatchSource

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<MatchSource, F::Error>

impl<'tcx> TypeFoldable<'tcx> for Unsafety

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Unsafety, F::Error>

impl<'tcx> TypeFoldable<'tcx> for InlineAsmRegOrRegClass

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<InlineAsmRegOrRegClass, F::Error>

impl<'tcx> TypeFoldable<'tcx> for Abi

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Abi, F::Error>

impl<'tcx> TypeFoldable<'tcx> for Span

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Span, F::Error>

impl<'tcx> TypeFoldable<'tcx> for ErrorGuaranteed

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<ErrorGuaranteed, F::Error>

impl<'tcx> TypeFoldable<'tcx> for Size

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    _: &mut F
) -> Result<Size, F::Error>

impl<'tcx, T: TypeFoldable<'tcx>, U: TypeFoldable<'tcx>> TypeFoldable<'tcx> for (T, U)

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<(T, U), F::Error>

impl<'tcx, A: TypeFoldable<'tcx>, B: TypeFoldable<'tcx>, C: TypeFoldable<'tcx>> TypeFoldable<'tcx> for (A, B, C)

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<(A, B, C), F::Error>

impl<'tcx, T> TypeFoldable<'tcx> for Option<T>where
    T: TypeFoldable<'tcx>,

fn try_fold_with<V: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut V
) -> Result<Self, V::Error>

impl<'tcx, T, E> TypeFoldable<'tcx> for Result<T, E>where
    T: TypeFoldable<'tcx>,
    E: TypeFoldable<'tcx>,

fn try_fold_with<V: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut V
) -> Result<Self, V::Error>

impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Rc<T>

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<Self, F::Error>

impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Arc<T>

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<Self, F::Error>

impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Box<T>

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<Self, F::Error>

impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Vec<T>

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<Self, F::Error>

impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Box<[T]>

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<Self, F::Error>

impl<'tcx, T: TypeFoldable<'tcx>, I: Idx> TypeFoldable<'tcx> for IndexVec<I, T>

fn try_fold_with<F: FallibleTypeFolder<'tcx>>(
    self,
    folder: &mut F
) -> Result<Self, F::Error>

Implementors

impl<'tcx> TypeFoldable<'tcx> for &'tcx List<Predicate<'tcx>>

impl<'tcx> TypeFoldable<'tcx> for &'tcx List<Ty<'tcx>>

impl<'tcx> TypeFoldable<'tcx> for &'tcx List<Binder<'tcx, ExistentialPredicate<'tcx>>>

impl<'tcx> TypeFoldable<'tcx> for &'tcx List<PlaceElem<'tcx>>

impl<'tcx> TypeFoldable<'tcx> for &'tcx List<ProjectionKind>

impl<'tcx> TypeFoldable<'tcx> for PlaceBase

impl<'tcx> TypeFoldable<'tcx> for ProjectionKind

impl<'tcx> TypeFoldable<'tcx> for CanonicalTyVarKind

impl<'tcx> TypeFoldable<'tcx> for CanonicalVarKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Certainty

impl<'tcx> TypeFoldable<'tcx> for CoverageKind

impl<'tcx> TypeFoldable<'tcx> for Op

impl<'tcx> TypeFoldable<'tcx> for BindingForm<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ConstantKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for LocalInfo<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Mutability

impl<'tcx> TypeFoldable<'tcx> for VarDebugInfoContents<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ErrorHandled

impl<'tcx> TypeFoldable<'tcx> for Scalar

impl<'tcx> TypeFoldable<'tcx> for AggregateKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for BinOp

impl<'tcx> TypeFoldable<'tcx> for rustc_middle::mir::syntax::BorrowKind

impl<'tcx> TypeFoldable<'tcx> for CastKind

impl<'tcx> TypeFoldable<'tcx> for FakeReadCause

impl<'tcx> TypeFoldable<'tcx> for InlineAsmOperand<'tcx>

impl<'tcx> TypeFoldable<'tcx> for MirPhase

impl<'tcx> TypeFoldable<'tcx> for NonDivergingIntrinsic<'tcx>

impl<'tcx> TypeFoldable<'tcx> for NullOp

impl<'tcx> TypeFoldable<'tcx> for Operand<'tcx>

impl<'tcx> TypeFoldable<'tcx> for RetagKind

impl<'tcx> TypeFoldable<'tcx> for Rvalue<'tcx>

impl<'tcx> TypeFoldable<'tcx> for StatementKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TerminatorKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UnOp

impl<'tcx> TypeFoldable<'tcx> for Reveal

impl<'tcx> TypeFoldable<'tcx> for SelectionError<'tcx>

impl<'tcx> TypeFoldable<'tcx> for OutlivesBound<'tcx>

impl<'tcx> TypeFoldable<'tcx> for OverflowError

impl<'tcx> TypeFoldable<'tcx> for SelectionCandidate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for NotConstEvaluatable

impl<'tcx> TypeFoldable<'tcx> for Adjust<'tcx>

impl<'tcx> TypeFoldable<'tcx> for AutoBorrow<'tcx>

impl<'tcx> TypeFoldable<'tcx> for AutoBorrowMutability

impl<'tcx> TypeFoldable<'tcx> for PointerCast

impl<'tcx> TypeFoldable<'tcx> for AdtKind

impl<'tcx> TypeFoldable<'tcx> for AssocKind

impl<'tcx> TypeFoldable<'tcx> for BindingMode

impl<'tcx> TypeFoldable<'tcx> for rustc_middle::ty::closure::BorrowKind

impl<'tcx> TypeFoldable<'tcx> for ClosureKind

impl<'tcx> TypeFoldable<'tcx> for UpvarCapture

impl<'tcx> TypeFoldable<'tcx> for ConstKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for InferConst<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ValTree<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UserType<'tcx>

impl<'tcx> TypeFoldable<'tcx> for BoundConstness

impl<'tcx> TypeFoldable<'tcx> for FloatTy

impl<'tcx> TypeFoldable<'tcx> for ImplPolarity

impl<'tcx> TypeFoldable<'tcx> for ImplSubject<'tcx>

impl<'tcx> TypeFoldable<'tcx> for InferTy

impl<'tcx> TypeFoldable<'tcx> for IntVarValue

impl<'tcx> TypeFoldable<'tcx> for PredicateKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TermKind<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Variance

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

impl<'tcx> TypeFoldable<'tcx> for InstanceDef<'tcx>

impl<'tcx> TypeFoldable<'tcx> for BoundRegionKind

impl<'tcx> TypeFoldable<'tcx> for ExistentialPredicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for rustc_middle::hir::place::Place<'tcx>

impl<'tcx> TypeFoldable<'tcx> for PlaceWithHirId<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Projection<'tcx>

impl<'tcx> TypeFoldable<'tcx> for CanonicalVarInfo<'tcx>

impl<'tcx> TypeFoldable<'tcx> for CanonicalVarValues<'tcx>

impl<'tcx> TypeFoldable<'tcx> for QueryRegionConstraints<'tcx>

impl<'tcx> TypeFoldable<'tcx> for MemberConstraint<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Scope

impl<'tcx> TypeFoldable<'tcx> for BasicBlocks<'tcx>

impl<'tcx> TypeFoldable<'tcx> for CodeRegion

impl<'tcx> TypeFoldable<'tcx> for CounterValueReference

impl<'tcx> TypeFoldable<'tcx> for ExpressionOperandId

impl<'tcx> TypeFoldable<'tcx> for InjectedExpressionId

impl<'tcx> TypeFoldable<'tcx> for InjectedExpressionIndex

impl<'tcx> TypeFoldable<'tcx> for MappedExpressionIndex

impl<'tcx> TypeFoldable<'tcx> for GraphIsCyclicCache

impl<'tcx> TypeFoldable<'tcx> for GlobalId<'tcx>

impl<'tcx> TypeFoldable<'tcx> for PredecessorCache

impl<'tcx> TypeFoldable<'tcx> for GeneratorLayout<'tcx>

impl<'tcx> TypeFoldable<'tcx> for GeneratorSavedLocal

impl<'tcx> TypeFoldable<'tcx> for BasicBlock

impl<'tcx> TypeFoldable<'tcx> for BasicBlockData<'tcx>

impl<'tcx> TypeFoldable<'tcx> for BlockTailInfo

impl<'tcx> TypeFoldable<'tcx> for Body<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Constant<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Field

impl<'tcx> TypeFoldable<'tcx> for GeneratorInfo<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Local

impl<'tcx> TypeFoldable<'tcx> for LocalDecl<'tcx>

impl<'tcx> TypeFoldable<'tcx> for MirSource<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Promoted

impl<'tcx> TypeFoldable<'tcx> for SourceInfo

impl<'tcx> TypeFoldable<'tcx> for SourceScope

impl<'tcx> TypeFoldable<'tcx> for SourceScopeData<'tcx>

impl<'tcx> TypeFoldable<'tcx> for SourceScopeLocalData

impl<'tcx> TypeFoldable<'tcx> for Statement<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UserTypeProjection

impl<'tcx> TypeFoldable<'tcx> for UserTypeProjections

impl<'tcx> TypeFoldable<'tcx> for VarDebugInfo<'tcx>

impl<'tcx> TypeFoldable<'tcx> for SwitchSourceCache

impl<'tcx> TypeFoldable<'tcx> for CopyNonOverlapping<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Coverage

impl<'tcx> TypeFoldable<'tcx> for rustc_middle::mir::syntax::Place<'tcx>

impl<'tcx> TypeFoldable<'tcx> for PlaceTy<'tcx>

impl<'tcx> TypeFoldable<'tcx> for SwitchTargets

impl<'tcx> TypeFoldable<'tcx> for Terminator<'tcx>

impl<'tcx> TypeFoldable<'tcx> for PostorderCache

impl<'tcx> TypeFoldable<'tcx> for LocalVarId

impl<'tcx> TypeFoldable<'tcx> for ChalkEnvironmentAndGoal<'tcx>

impl<'tcx> TypeFoldable<'tcx> for DropckOutlivesResult<'tcx>

impl<'tcx> TypeFoldable<'tcx> for NormalizationResult<'tcx>

impl<'tcx> TypeFoldable<'tcx> for AscribeUserType<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Eq<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ProvePredicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Subtype<'tcx>

impl<'tcx> TypeFoldable<'tcx> for IfExpressionCause<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ImplSourceDiscriminantKindData

impl<'tcx> TypeFoldable<'tcx> for ImplSourcePointeeData

impl<'tcx> TypeFoldable<'tcx> for Adjustment<'tcx>

impl<'tcx> TypeFoldable<'tcx> for OverloadedDeref<'tcx>

impl<'tcx> TypeFoldable<'tcx> for AdtDef<'tcx>

AdtDefs are basically the same as a DefId.

impl<'tcx> TypeFoldable<'tcx> for AssocItem

impl<'tcx> TypeFoldable<'tcx> for CaptureInfo

impl<'tcx> TypeFoldable<'tcx> for CapturedPlace<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UpvarId

impl<'tcx> TypeFoldable<'tcx> for UpvarPath

impl<'tcx> TypeFoldable<'tcx> for Unevaluated<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Unevaluated<'tcx, ()>

impl<'tcx> TypeFoldable<'tcx> for Const<'tcx>

impl<'tcx> TypeFoldable<'tcx> for CanonicalUserTypeAnnotation<'tcx>

impl<'tcx> TypeFoldable<'tcx> for DelaySpanBugEmitted

impl<'tcx> TypeFoldable<'tcx> for GeneratorInteriorTypeCause<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UserTypeAnnotationIndex

impl<'tcx> TypeFoldable<'tcx> for Instance<'tcx>

impl<'tcx> TypeFoldable<'tcx> for PrintClosureAsImpl<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TraitPredPrintModifiersAndPath<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TraitRefPrintOnlyTraitName<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TraitRefPrintOnlyTraitPath<'tcx>

impl<'tcx> TypeFoldable<'tcx> for GeneratorWitness<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ClosureSizeProfileData<'tcx>

impl<'tcx> TypeFoldable<'tcx> for CoercePredicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for DebruijnIndex

impl<'tcx> TypeFoldable<'tcx> for ImplHeader<'tcx>

impl<'tcx> TypeFoldable<'tcx> for InstantiatedPredicates<'tcx>

impl<'tcx> TypeFoldable<'tcx> for OpaqueHiddenType<'tcx>

impl<'tcx> TypeFoldable<'tcx> for OpaqueTypeKey<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ParamEnv<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Placeholder<BoundRegionKind>

impl<'tcx> TypeFoldable<'tcx> for Placeholder<BoundVar>

impl<'tcx> TypeFoldable<'tcx> for Predicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ProjectionPredicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for SubtypePredicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Term<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TraitPredicate<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Ty<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UniverseIndex

impl<'tcx> TypeFoldable<'tcx> for BoundVar

impl<'tcx> TypeFoldable<'tcx> for ClosureSubsts<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ExistentialProjection<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ExistentialTraitRef<'tcx>

impl<'tcx> TypeFoldable<'tcx> for FnSig<'tcx>

impl<'tcx> TypeFoldable<'tcx> for FreeRegion

impl<'tcx> TypeFoldable<'tcx> for GenSig<'tcx>

impl<'tcx> TypeFoldable<'tcx> for GeneratorSubsts<'tcx>

impl<'tcx> TypeFoldable<'tcx> for InlineConstSubsts<'tcx>

impl<'tcx> TypeFoldable<'tcx> for ParamConst

impl<'tcx> TypeFoldable<'tcx> for ParamTy

impl<'tcx> TypeFoldable<'tcx> for ProjectionTy<'tcx>

impl<'tcx> TypeFoldable<'tcx> for Region<'tcx>

impl<'tcx> TypeFoldable<'tcx> for RegionVid

impl<'tcx> TypeFoldable<'tcx> for TraitRef<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TypeAndMut<'tcx>

impl<'tcx> TypeFoldable<'tcx> for GenericArg<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UserSelfTy<'tcx>

impl<'tcx> TypeFoldable<'tcx> for UserSubsts<'tcx>

impl<'tcx> TypeFoldable<'tcx> for CanonicalVarInfos<'tcx>

impl<'tcx> TypeFoldable<'tcx> for SubstsRef<'tcx>

impl<'tcx, A, B> TypeFoldable<'tcx> for OutlivesPredicate<A, B>where
    A: TypeFoldable<'tcx>,
    B: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSource<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceAutoImplData<N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceBuiltinData<N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceClosureData<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceConstDestructData<N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceFnPointerData<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceGeneratorData<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceObjectData<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceTraitAliasData<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceTraitUpcastingData<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, N> TypeFoldable<'tcx> for ImplSourceUserDefinedData<'tcx, N>where
    N: TypeFoldable<'tcx>,

impl<'tcx, O> TypeFoldable<'tcx> for AssertKind<O>where
    O: TypeFoldable<'tcx>,

impl<'tcx, R> TypeFoldable<'tcx> for QueryResponse<'tcx, R>where
    R: TypeFoldable<'tcx>,

impl<'tcx, T> TypeFoldable<'tcx> for ClearCrossCrate<T>where
    T: TypeFoldable<'tcx>,

impl<'tcx, T> TypeFoldable<'tcx> for Normalize<T>where
    T: TypeFoldable<'tcx>,

impl<'tcx, T> TypeFoldable<'tcx> for ExpectedFound<T>where
    T: TypeFoldable<'tcx>,

impl<'tcx, T> TypeFoldable<'tcx> for ParamEnvAnd<'tcx, T>where
    T: TypeFoldable<'tcx>,

impl<'tcx, T> TypeFoldable<'tcx> for WithOptConstParam<T>where
    T: TypeFoldable<'tcx>,

impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Binder<'tcx, T>

impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for EarlyBinder<T>

impl<'tcx, V> TypeFoldable<'tcx> for Canonical<'tcx, V>where
    V: TypeFoldable<'tcx>,

impl<'tcx, V, T> TypeFoldable<'tcx> for ProjectionElem<V, T>where
    T: TypeFoldable<'tcx>,
    V: TypeFoldable<'tcx>,