Method visit_pre_mut

src/expr/src/relation.rs:2341–2347

Iterative pre-order visitor.

(&mut self, mut f: F)

    /// Iterative pre-order visitor.
    pub fn visit_pre_mut<F: FnMut(&mut Self)>(&mut self, mut f: F) {
        let mut worklist = vec![self];
        while let Some(expr) = worklist.pop() {
            f(expr);
            worklist.extend(expr.children_mut().rev());
        }
    }

    /// Return a vector of references to the subtrees of this expression
    /// in post-visit order (the last element is `&self`).