Struct Filter 

pub struct Filter<'a> { /* private fields */ }

Collection of node-matching predicates the find and count walks apply to each node they visit.

Implementations

impl Filter<'_>

pub fn any<'t>(&self, node: &Node<'t>, ancestors: Ancestors<'t, '_>) -> bool

Returns true if any of the configured predicates matches node, reached through ancestors.

A walker that maintains an ancestor chain should pass it. The "function" and "string" predicates ask about an enclosing construct, and off Ancestors::unknown each such lookup is Node::parent’s O(depth) — which made count --type string quadratic in nesting depth until find and count threaded a real chain (#1381).