Struct VisitCallbacks 

pub struct VisitCallbacks<State, Link, Marker, Policy = DefaultContextPolicy> { /* private fields */ }

A reusable callback visitor with shared user state.

Implementations

impl<State, Link, Marker> VisitCallbacks<State, Link, Marker>

where Link: VisitChainLink<State, Marker>,

pub fn new(state: State, callbacks: Link) -> Self

Construct a stateful callback visitor.

impl<State, Link, Marker, Policy> VisitCallbacks<State, Link, Marker, Policy>

pub fn with_policy<P: ContextPolicy<State>>( self, policy: P, ) -> VisitCallbacks<State, Link, Marker, P>

Set the default-recursion policy while retaining the callbacks and state. A matched callback enters the policy only when it calls visit_children().

pub fn state(&self) -> &State

Shared access to the callback state.

pub fn state_mut(&mut self) -> &mut State

Mutable access to the callback state outside an active recursive call.

pub fn into_state(self) -> State

Consume the visitor and return its state.

Trait Implementations

impl<State, Link, Marker, Policy> StructuralVisitor for VisitCallbacks<State, Link, Marker, Policy>

where Link: VisitChainLink<State, Marker>, Policy: ContextPolicy<State>,

fn visit( &mut self, value: &StructuralView, def_region_kind: DefRegionKind, ) -> Result<Option<VisitInterrupt>>

Visit one value under the definition-region state active at it.

fn default_visit_children( &mut self, value: &StructuralView, def_region_kind: DefRegionKind, ) -> Result<Option<VisitInterrupt>>

Visit value’s children with the default structural rules.

fn visit_child<T>( &mut self, child: &T, def_region_kind: DefRegionKind, ) -> Result<Option<VisitInterrupt>>

where for<'x> AnyView<'x>: From<&'x T>,

Visit child under def_region_kind.