Trait ContextPolicy 

pub trait ContextPolicy<State> {
    // Required method
    fn default_visit(
        &self,
        value: &StructuralView,
        visitor: &mut VisitContext<'_, State>,
    ) -> Result<Option<VisitInterrupt>>;
}

A reusable policy for managing context around default visit and walk recursion.

visit_children() on this policy’s context continues with the next policy (or the built-in hooks and reflected fields). visit() re-enters the full callback engine for a child. A tuple (outer, inner) composes two policies; tuples may nest. Policies receive &self; mutable pass data belongs in the context’s state. Save and restore scoped state around descent.

Required Methods

fn default_visit( &self, value: &StructuralView, visitor: &mut VisitContext<'_, State>, ) -> Result<Option<VisitInterrupt>>

Customize default descent for the current value.

Return interrupts explicitly, and restore any scoped state before returning an interrupt or error. Walk invokes this between its pre- and post-order callback positions; visit invokes it only on callback miss or when a matched callback requests default descent.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<State, Outer: ContextPolicy<State>, Inner: ContextPolicy<State>> ContextPolicy<State> for (Outer, Inner)

fn default_visit( &self, value: &StructuralView, visitor: &mut VisitContext<'_, State>, ) -> Result<Option<VisitInterrupt>>

Implementors

impl<State> ContextPolicy<State> for DefaultContextPolicy