Rust で木を表現/生成。

rust_tree_impl.rs

#[derive(Debug)]
enum Tree {
    Leaf(i32),
    Node(Box<Tree>, Box<Tree>),
}

fn main() {
    let mut tree = Tree::Leaf(0);
    for i in vec!{0,1,2,3,4,5} {
        tree = Tree::Node(Box::<Tree>::new(tree), 
                             Box::<Tree>::new(Tree::Leaf(i * 10)));
    }
    println!("{:?}",tree);
}