Struct SubstVisitor

pub(crate) struct SubstVisitor<'a> {
    generics: &'a GenericArgs,
    self_ref: &'a TraitRefKind,
    binder_depth: DeBruijnId,
}

Visitor for the TyVisitable::substitute function. This substitutes variables bound at the level where we start to substitute (level 0).

Fields

generics: &'a GenericArgs

self_ref: &'a TraitRefKind

binder_depth: DeBruijnId

Implementations

impl<'a> SubstVisitor<'a>

pub(crate) fn new(generics: &'a GenericArgs, self_ref: &'a TraitRefKind) -> Self

fn process_var<Id, T>(&self, var: &mut DeBruijnVar<Id>) -> Option<T>

where Id: Copy, GenericArgs: Index<Id, Output = T>, T: Clone + TyVisitable,

Process the variable, either modifying the variable in-place or returning the new value to assign to the type/region/const generic/trait ref that was this variable.

Trait Implementations

impl VisitAstMut for SubstVisitor<'_>

fn enter_region_binder<T: AstVisitable>(&mut self, _: &mut RegionBinder<T>)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_region_binder<T: AstVisitable>(&mut self, _: &mut RegionBinder<T>)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn enter_binder<T: AstVisitable>(&mut self, _: &mut Binder<T>)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_binder<T: AstVisitable>(&mut self, _: &mut Binder<T>)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn exit_region(&mut self, r: &mut Region)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn exit_ty(&mut self, ty: &mut Ty)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn exit_const_generic(&mut self, cg: &mut ConstGeneric)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn exit_constant_expr(&mut self, ce: &mut ConstantExpr)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn exit_trait_ref_kind(&mut self, kind: &mut TraitRefKind)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit<'a, T: AstVisitable>( &'a mut self, x: &mut T, ) -> ControlFlow<Self::Break>

Visit a visitable type. This calls the appropriate method of this trait on x (visit_$ty if it exists, visit_inner if not).

fn visit_by_val<T: AstVisitable>( self, x: &mut T, ) -> ControlFlow<Self::Break, Self>

Convenience alias for method chaining.

fn visit_by_val_infallible<T: AstVisitable>(self, x: &mut T) -> Self

where Self: Visitor<Break = Infallible> + Sized,

Convenience when the visitor does not return early.

fn visit_inner<T>(&mut self, x: &mut T) -> ControlFlow<Self::Break>

where T: for<'s> DriveMut<'s, AstVisitableWrapper<Self>>,

Visit the contents of x. This calls self.visit() on each field of T. This is available for any type whose contents are all #trait_name.

fn visit_de_bruijn_id(&mut self, x: &mut DeBruijnId) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_de_bruijn_id(&mut self, x: &mut DeBruijnId)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_de_bruijn_id(&mut self, x: &mut DeBruijnId)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_ty(&mut self, x: &mut Ty) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_ty(&mut self, x: &mut Ty)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn visit_ty_kind(&mut self, x: &mut TyKind) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_ty_kind(&mut self, x: &mut TyKind)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_ty_kind(&mut self, x: &mut TyKind)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_region(&mut self, x: &mut Region) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_region(&mut self, x: &mut Region)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn visit_const_generic( &mut self, x: &mut ConstGeneric, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_const_generic(&mut self, x: &mut ConstGeneric)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn visit_trait_ref(&mut self, x: &mut TraitRef) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_ref(&mut self, x: &mut TraitRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_ref(&mut self, x: &mut TraitRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_ref_kind( &mut self, x: &mut TraitRefKind, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_ref_kind(&mut self, x: &mut TraitRefKind)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn visit_type_decl_ref( &mut self, x: &mut TypeDeclRef, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_type_decl_ref(&mut self, x: &mut TypeDeclRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_type_decl_ref(&mut self, x: &mut TypeDeclRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_fun_decl_ref(&mut self, x: &mut FunDeclRef) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_fun_decl_ref(&mut self, x: &mut FunDeclRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_fun_decl_ref(&mut self, x: &mut FunDeclRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_maybe_builtin_fun_decl_ref( &mut self, x: &mut MaybeBuiltinFunDeclRef, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_maybe_builtin_fun_decl_ref(&mut self, x: &mut MaybeBuiltinFunDeclRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_maybe_builtin_fun_decl_ref(&mut self, x: &mut MaybeBuiltinFunDeclRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_method_ref( &mut self, x: &mut TraitMethodRef, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_method_ref(&mut self, x: &mut TraitMethodRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_method_ref(&mut self, x: &mut TraitMethodRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_global_decl_ref( &mut self, x: &mut GlobalDeclRef, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_global_decl_ref(&mut self, x: &mut GlobalDeclRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_global_decl_ref(&mut self, x: &mut GlobalDeclRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_decl_ref( &mut self, x: &mut TraitDeclRef, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_decl_ref(&mut self, x: &mut TraitDeclRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_decl_ref(&mut self, x: &mut TraitDeclRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_impl_ref( &mut self, x: &mut TraitImplRef, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_impl_ref(&mut self, x: &mut TraitImplRef)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_impl_ref(&mut self, x: &mut TraitImplRef)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_generic_args( &mut self, x: &mut GenericArgs, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_generic_args(&mut self, x: &mut GenericArgs)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_generic_args(&mut self, x: &mut GenericArgs)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_generic_params( &mut self, x: &mut GenericParams, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_generic_params(&mut self, x: &mut GenericParams)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_generic_params(&mut self, x: &mut GenericParams)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_clause( &mut self, x: &mut TraitClause, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_clause(&mut self, x: &mut TraitClause)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_clause(&mut self, x: &mut TraitClause)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_clause_id( &mut self, x: &mut TraitClauseId, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_clause_id(&mut self, x: &mut TraitClauseId)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_clause_id(&mut self, x: &mut TraitClauseId)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_type_constraint( &mut self, x: &mut TraitTypeConstraint, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_type_constraint(&mut self, x: &mut TraitTypeConstraint)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_type_constraint(&mut self, x: &mut TraitTypeConstraint)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_place(&mut self, x: &mut Place) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_place(&mut self, x: &mut Place)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_place(&mut self, x: &mut Place)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_rvalue(&mut self, x: &mut Rvalue) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_rvalue(&mut self, x: &mut Rvalue)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_rvalue(&mut self, x: &mut Rvalue)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_de_bruijn_var<T: AstVisitable + Idx>( &mut self, x: &mut DeBruijnVar<T>, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_de_bruijn_var<T: AstVisitable + Idx>(&mut self, x: &mut DeBruijnVar<T>)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_de_bruijn_var<T: AstVisitable + Idx>(&mut self, x: &mut DeBruijnVar<T>)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_region_binder<T: AstVisitable>( &mut self, x: &mut RegionBinder<T>, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn visit_binder<T: AstVisitable>( &mut self, x: &mut Binder<T>, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn visit_llbc_statement( &mut self, x: &mut Statement, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_llbc_statement(&mut self, x: &mut Statement)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_llbc_statement(&mut self, x: &mut Statement)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_ullbc_statement( &mut self, x: &mut Statement, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_ullbc_statement(&mut self, x: &mut Statement)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_ullbc_statement(&mut self, x: &mut Statement)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_aggregate_kind( &mut self, x: &mut AggregateKind, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_aggregate_kind(&mut self, x: &mut AggregateKind)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_aggregate_kind(&mut self, x: &mut AggregateKind)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_fn_ptr(&mut self, x: &mut FnPtr) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_fn_ptr(&mut self, x: &mut FnPtr)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_fn_ptr(&mut self, x: &mut FnPtr)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_item_kind(&mut self, x: &mut ItemKind) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_item_kind(&mut self, x: &mut ItemKind)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_item_kind(&mut self, x: &mut ItemKind)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_item_meta(&mut self, x: &mut ItemMeta) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_item_meta(&mut self, x: &mut ItemMeta)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_item_meta(&mut self, x: &mut ItemMeta)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_span(&mut self, x: &mut Span) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_span(&mut self, x: &mut Span)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_span(&mut self, x: &mut Span)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_constant_expr( &mut self, x: &mut ConstantExpr, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_constant_expr(&mut self, x: &mut ConstantExpr)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn visit_fun_decl_id(&mut self, x: &mut FunDeclId) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_fun_decl_id(&mut self, x: &mut FunDeclId)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_fun_decl_id(&mut self, x: &mut FunDeclId)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_global_decl_id( &mut self, x: &mut GlobalDeclId, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_global_decl_id(&mut self, x: &mut GlobalDeclId)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_global_decl_id(&mut self, x: &mut GlobalDeclId)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_type_decl_id(&mut self, x: &mut TypeDeclId) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_type_decl_id(&mut self, x: &mut TypeDeclId)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_type_decl_id(&mut self, x: &mut TypeDeclId)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_decl_id( &mut self, x: &mut TraitDeclId, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_decl_id(&mut self, x: &mut TraitDeclId)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_decl_id(&mut self, x: &mut TraitDeclId)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_impl_id( &mut self, x: &mut TraitImplId, ) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_impl_id(&mut self, x: &mut TraitImplId)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_impl_id(&mut self, x: &mut TraitImplId)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_fun_decl(&mut self, x: &mut FunDecl) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_fun_decl(&mut self, x: &mut FunDecl)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_fun_decl(&mut self, x: &mut FunDecl)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_global_decl(&mut self, x: &mut GlobalDecl) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_global_decl(&mut self, x: &mut GlobalDecl)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_global_decl(&mut self, x: &mut GlobalDecl)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_type_decl(&mut self, x: &mut TypeDecl) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_type_decl(&mut self, x: &mut TypeDecl)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_type_decl(&mut self, x: &mut TypeDecl)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_decl(&mut self, x: &mut TraitDecl) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_decl(&mut self, x: &mut TraitDecl)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_decl(&mut self, x: &mut TraitDecl)

Called when finished visiting a $ty (unless visit_$ty is overriden).

fn visit_trait_impl(&mut self, x: &mut TraitImpl) -> ControlFlow<Self::Break>

Overrideable method called when visiting a $ty. When overriding this method, call self.visit_inner(x) to keep recursively visiting the type, or don’t call it if the contents of x should not be visited.

fn enter_trait_impl(&mut self, x: &mut TraitImpl)

Called when starting to visit a $ty (unless visit_$ty is overriden).

fn exit_trait_impl(&mut self, x: &mut TraitImpl)

Called when finished visiting a $ty (unless visit_$ty is overriden).

impl<'a> Visitor for SubstVisitor<'a>

type Break = Infallible

The type used for early-return, if the visitor supports it. Use an empty type like std::convert::Infallible if the visitor does not short-circuit.