Trait polars_plan::logical_plan::visitor::Visitor

pub trait Visitor {
    type Node;

    // Provided methods
    fn pre_visit(&mut self, _node: &Self::Node) -> PolarsResult<VisitRecursion> { ... }
    fn post_visit(&mut self, _node: &Self::Node) -> PolarsResult<VisitRecursion> { ... }
}

Required Associated Types

type Node

Provided Methods

fn pre_visit(&mut self, _node: &Self::Node) -> PolarsResult<VisitRecursion>

Invoked before any children of node are visited.

fn post_visit(&mut self, _node: &Self::Node) -> PolarsResult<VisitRecursion>

Invoked after all children of node are visited. Default implementation does nothing.

Implementors