pub fn try<T: Send>(f: ~fn() -> T) -> Result<T, ()>
Execute a function in another task and return either the return value of the function or result::err.
This is equivalent to task().supervised().try.
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).