Tree

bin.rs

struct Owned
{
    Name : ~str
}

struct Node
{
    Resource : Owned,
    Children : ~[Node]
}

impl Drop for Owned
{
    fn finalize(&self)
    {
        io::println(self.Name);
    }
}

fn new(name : ~str) -> Node
{
    Node{Resource : Owned{Name : name}, Children : ~[]}
}

fn spawn_child<'l>(parent : &'l mut Node, name : ~str) -> &'l mut Node
{
   parent.Children.push(new(name));
   &'l mut parent.Children[parent.Children.len() - 1]
}

fn main()
{
    let mut parent = ~new(~"parent");
    let child = spawn_child(&mut *parent, ~"child");
    
    /*{
        let b = parent;
    }*/
}

/*
bin.rs:27:3: 27:18 error: loan of mutable field as mutable conflicts with prior loan
bin.rs:27    parent.Children.push(new(name));
             ^~~~~~~~~~~~~~~
bin.rs:28:11: 28:26 note: prior loan as immutable granted here
bin.rs:28    &'l mut parent.Children[parent.Children.len() - 1]
                     ^~~~~~~~~~~~~~~
error: aborting due to previous error
*/