pub fn spawn_with<A: Send>(arg: A, f: ~fn(v: A))
Runs a task, while transferring ownership of one argument to the child.
This is useful for transferring ownership of noncopyables to another task.
This function is equivalent to task().spawn_with(arg, f).
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct (or str), enum,
trait, typedef (or
tdef).