use symbolica::{
    atom::Atom,
    id::{AtomTreeIterator, MatchSettings},
};

fn main() {
    let expr: Atom = Atom::parse("f(z)*f(f(x),z)*f(y)").unwrap();

    println!("> Tree walk of {}:", expr);

    for (loc, view) in AtomTreeIterator::new(
        expr.as_view(),
        MatchSettings {
            level_range: (1, Some(2)),
            level_is_tree_depth: false,
            ..Default::default()
        },
    ) {
        println!("\tAtom at location {:?}: {}", loc, view);
    }
}