pcwalton

extern mod std;

use std::map::HashMap;
use std::map::Set;
use std::map::vec_from_set;

enum Choice {
    Many(Set<int>),
    One(int),
}

pcwalton

fn foo(p: &a.memory_pool) -> &a.T {
   let x: &a.T = new(*p) T;
   ret x; // ok
}

fn bar() {
   let pool: memory_pool = pool();
   let x = foo(pool);
   // ... do something with x ...
}