Trait Visitor 

pub trait Visitor {
    // Provided methods
    fn walk(&mut self, node: &QueryNode) { ... }
    fn visit_text(&mut self, s: &str) { ... }
    fn visit_exact(&mut self, s: &str) { ... }
    fn visit_phrase(&mut self, s: &str) { ... }
    fn visit_field(&mut self, field: QueryField, value: &str) { ... }
    fn visit_filter(&mut self, kind: &FilterKind) { ... }
    fn visit_label(&mut self, name: &str) { ... }
    fn visit_date(&mut self, bound: DateBound, date: &DateValue) { ... }
    fn visit_size(&mut self, op: SizeOp, bytes: u64) { ... }
    fn visit_near(&mut self, left: &str, right: &str, distance: u32) { ... }
    fn visit_and_pre(&mut self, left: &QueryNode, right: &QueryNode) { ... }
    fn visit_and_post(&mut self, left: &QueryNode, right: &QueryNode) { ... }
    fn visit_or_pre(&mut self, left: &QueryNode, right: &QueryNode) { ... }
    fn visit_or_post(&mut self, left: &QueryNode, right: &QueryNode) { ... }
    fn visit_not_pre(&mut self, inner: &QueryNode) { ... }
    fn visit_not_post(&mut self, inner: &QueryNode) { ... }
}

AST visitor.

Implementors override the per-variant hooks they care about. Call Visitor::walk on a root QueryNode to start traversal — walk recurses into compound nodes (And/Or/Not) and dispatches to leaf hooks.

Provided Methods

fn walk(&mut self, node: &QueryNode)

Recursive walk. Visits leaves via the typed hooks below; recurses into And/Or/Not children. Override only if you need to short-circuit traversal.

fn visit_text(&mut self, s: &str)

fn visit_exact(&mut self, s: &str)

fn visit_phrase(&mut self, s: &str)

fn visit_field(&mut self, field: QueryField, value: &str)

fn visit_filter(&mut self, kind: &FilterKind)

fn visit_label(&mut self, name: &str)

fn visit_date(&mut self, bound: DateBound, date: &DateValue)

fn visit_size(&mut self, op: SizeOp, bytes: u64)

fn visit_near(&mut self, left: &str, right: &str, distance: u32)

fn visit_and_pre(&mut self, left: &QueryNode, right: &QueryNode)

fn visit_and_post(&mut self, left: &QueryNode, right: &QueryNode)

fn visit_or_pre(&mut self, left: &QueryNode, right: &QueryNode)

fn visit_or_post(&mut self, left: &QueryNode, right: &QueryNode)

fn visit_not_pre(&mut self, inner: &QueryNode)

fn visit_not_post(&mut self, inner: &QueryNode)

Dyn Compatibility

This trait is dyn compatible.

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

Implementors