Trait TypeVisitable

pub trait TypeVisitable<I: Interner>: Debug + Clone {
    // Required method
    fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result;
}

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

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

Required Methods

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

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

For types of interest (such as Ty), the implementation of this method that calls a visitor method specifically for that type (such as V::visit_ty). This is where control transfers from TypeVisitable to TypeVisitor.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<I: Interner> TypeVisitable<I> for Movability

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for Mutability

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for bool

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for u16

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for u32

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for u64

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for ()

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for usize

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner> TypeVisitable<I> for String

fn visit_with<F: TypeVisitor<I>>(&self, _: &mut F) -> F::Result

impl<I: Interner, A: TypeVisitable<I>, B: TypeVisitable<I>, C: TypeVisitable<I>> TypeVisitable<I> for (A, B, C)

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for &[T]

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Option<T>

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Box<[T]>

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Box<T>

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Vec<T>

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for ThinVec<T>

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>, E: TypeVisitable<I>> TypeVisitable<I> for Result<T, E>

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>, Ix: Idx> TypeVisitable<I> for IndexVec<Ix, T>

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

impl<I: Interner, T: TypeVisitable<I>, U: TypeVisitable<I>> TypeVisitable<I> for (T, U)

fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result

Implementors

impl<I> TypeVisitable<I> for CanonicalTyVarKind

where I: Interner,

impl<I> TypeVisitable<I> for CanonicalVarKind<I>

where I: Interner, I::PlaceholderTy: TypeVisitable<I>, I::PlaceholderRegion: TypeVisitable<I>, I::PlaceholderConst: TypeVisitable<I>,

impl<I> TypeVisitable<I> for TypeError<I>

where I: Interner, I::Region: TypeVisitable<I>, I::BoundRegion: TypeVisitable<I>, ExpectedFound<I::Ty>: TypeVisitable<I>, ExpectedFound<I::DefId>: TypeVisitable<I>, I::Ty: TypeVisitable<I>, I::Const: TypeVisitable<I>, ExpectedFound<I::BoundExistentialPredicates>: TypeVisitable<I>, ExpectedFound<I::Const>: TypeVisitable<I>, I::DefId: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ExistentialPredicate<I>

where I: Interner, ExistentialTraitRef<I>: TypeVisitable<I>, ExistentialProjection<I>: TypeVisitable<I>, I::DefId: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ClauseKind<I>

where I: Interner, TraitPredicate<I>: TypeVisitable<I>, OutlivesPredicate<I, I::Region>: TypeVisitable<I>, OutlivesPredicate<I, I::Ty>: TypeVisitable<I>, ProjectionPredicate<I>: TypeVisitable<I>, I::Const: TypeVisitable<I>, I::Ty: TypeVisitable<I>, I::GenericArg: TypeVisitable<I>, HostEffectPredicate<I>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for PredicateKind<I>

where I: Interner, ClauseKind<I>: TypeVisitable<I>, I::DefId: TypeVisitable<I>, SubtypePredicate<I>: TypeVisitable<I>, CoercePredicate<I>: TypeVisitable<I>, I::Const: TypeVisitable<I>, NormalizesTo<I>: TypeVisitable<I>, I::Term: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ProbeKind<I>

where I: Interner, QueryResult<I>: TypeVisitable<I>, CandidateSource<I>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for CanonicalVarInfo<I>

where I: Interner, CanonicalVarKind<I>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for CanonicalVarValues<I>

where I: Interner, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for UnevaluatedConst<I>

where I: Interner, I::DefId: TypeVisitable<I>, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for OpaqueTypeKey<I>

where I: Interner, I::LocalDefId: TypeVisitable<I>, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for AliasTerm<I>

where I: Interner, I::GenericArgs: TypeVisitable<I>, I::DefId: TypeVisitable<I>,

impl<I> TypeVisitable<I> for CoercePredicate<I>

where I: Interner, I::Ty: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ExistentialProjection<I>

where I: Interner, I::DefId: TypeVisitable<I>, I::GenericArgs: TypeVisitable<I>, I::Term: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ExistentialTraitRef<I>

where I: Interner, I::DefId: TypeVisitable<I>, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for HostEffectPredicate<I>

where I: Interner, TraitRef<I>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for NormalizesTo<I>

where I: Interner, AliasTerm<I>: TypeVisitable<I>, I::Term: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ProjectionPredicate<I>

where I: Interner, AliasTerm<I>: TypeVisitable<I>, I::Term: TypeVisitable<I>,

impl<I> TypeVisitable<I> for SubtypePredicate<I>

where I: Interner, I::Ty: TypeVisitable<I>,

impl<I> TypeVisitable<I> for TraitPredicate<I>

where I: Interner, TraitRef<I>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for TraitRef<I>

where I: Interner, I::DefId: TypeVisitable<I>, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ExternalConstraintsData<I>

where I: Interner, Vec<OutlivesPredicate<I, I::GenericArg>>: TypeVisitable<I>, Vec<(OpaqueTypeKey<I>, I::Ty)>: TypeVisitable<I>, NestedNormalizationGoals<I>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for NestedNormalizationGoals<I>

where I: Interner, Vec<(GoalSource, Goal<I, I::Predicate>)>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for PredefinedOpaquesData<I>

where I: Interner, Vec<(OpaqueTypeKey<I>, I::Ty)>: TypeVisitable<I>,

impl<I> TypeVisitable<I> for Response<I>

where I: Interner, CanonicalVarValues<I>: TypeVisitable<I>, I::ExternalConstraints: TypeVisitable<I>,

impl<I> TypeVisitable<I> for ClosureArgs<I>

where I: Interner, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for CoroutineArgs<I>

where I: Interner, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for CoroutineClosureArgs<I>

where I: Interner, I::GenericArgs: TypeVisitable<I>,

impl<I> TypeVisitable<I> for CoroutineClosureSignature<I>

where I: Interner, I::Ty: TypeVisitable<I>,

impl<I> TypeVisitable<I> for GenSig<I>

where I: Interner, I::Ty: TypeVisitable<I>,

impl<I> TypeVisitable<I> for AliasTy<I>

where I: Interner, I::GenericArgs: TypeVisitable<I>, I::DefId: TypeVisitable<I>,

impl<I> TypeVisitable<I> for FnHeader<I>

where I: Interner, I::Safety: TypeVisitable<I>, I::Abi: TypeVisitable<I>,

impl<I> TypeVisitable<I> for FnSig<I>

where I: Interner, I::Tys: TypeVisitable<I>,

impl<I> TypeVisitable<I> for FnSigTys<I>

where I: Interner, I::Tys: TypeVisitable<I>,

impl<I> TypeVisitable<I> for TypeAndMut<I>

where I: Interner, I::Ty: TypeVisitable<I>,

impl<I, A> TypeVisitable<I> for OutlivesPredicate<I, A>

where I: Interner, A: TypeVisitable<I>, I::Region: TypeVisitable<I>,

impl<I, P> TypeVisitable<I> for Goal<I, P>

where I: Interner, I::ParamEnv: TypeVisitable<I>, P: TypeVisitable<I>,

impl<I, P> TypeVisitable<I> for QueryInput<I, P>

where I: Interner, Goal<I, P>: TypeVisitable<I>, I::PredefinedOpaques: TypeVisitable<I>,

impl<I, T> TypeVisitable<I> for State<I, T>

where I: Interner, CanonicalVarValues<I>: TypeVisitable<I>, T: TypeVisitable<I>,

impl<I, V> TypeVisitable<I> for Canonical<I, V>

where I: Interner, V: TypeVisitable<I>, I::CanonicalVars: TypeVisitable<I>,

impl<I: Interner> TypeVisitable<I> for Variance

impl<I: Interner> TypeVisitable<I> for BoundConstness

impl<I: Interner> TypeVisitable<I> for PredicatePolarity

impl<I: Interner> TypeVisitable<I> for AliasRelationDirection

impl<I: Interner> TypeVisitable<I> for BuiltinImplSource

impl<I: Interner> TypeVisitable<I> for Certainty

impl<I: Interner> TypeVisitable<I> for GoalSource

impl<I: Interner> TypeVisitable<I> for MaybeCause

impl<I: Interner> TypeVisitable<I> for AliasTyKind

impl<I: Interner> TypeVisitable<I> for FloatTy

impl<I: Interner> TypeVisitable<I> for InferTy

impl<I: Interner> TypeVisitable<I> for IntVarValue

impl<I: Interner> TypeVisitable<I> for RegionVid

impl<I: Interner> TypeVisitable<I> for NoSolution

impl<I: Interner> TypeVisitable<I> for DebruijnIndex

impl<I: Interner> TypeVisitable<I> for UniverseIndex

impl<I: Interner, T> !TypeVisitable<I> for EarlyBinder<I, T>

For early binders, you should first call instantiate before using any visitors.

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Binder<I, T>

impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Lrc<T>

impl<T, I> TypeVisitable<I> for ExpectedFound<T>

where I: Interner, T: TypeVisitable<I>,