Parent-Child ref

test.rs

fn main()
{
	trait Trait
	{
		
	}

	struct Parent
	{
		a : Option<~Trait>
	}
	
	struct Child;
	
	impl Child
	{
		fn new<'l>(p : &'l mut Parent) -> &'l Child
		{
			let ret = ~Child;
			p.a = Some(ret as ~Trait);
			// ???
		}
	}
	
	impl Trait for Child
	{
		
	}
}