Trait Visitor 

pub trait Visitor {
    // Provided methods
    fn visit_program(&mut self, program: &Program) { ... }
    fn visit_stmt(&mut self, stmt: &Stmt) { ... }
    fn visit_expr(&mut self, expr: &Expr) { ... }
}

A read-only traversal over the AST.

Override the visit_* methods for the nodes you care about; call the corresponding walk_* free function (or walk_expr/walk_stmt) from your override to continue into child nodes. Omitting that call prunes the subtree — occasionally useful, but usually you want to recurse.

Provided Methods

fn visit_program(&mut self, program: &Program)

fn visit_stmt(&mut self, stmt: &Stmt)

fn visit_expr(&mut self, expr: &Expr)

Dyn Compatibility

This trait is dyn compatible.

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

Implementors