gistfile1.txt

fn main() {
  use std::iterator::*;

  let a: Counter<uint> = Counter::new(0u, 1);
  let asdf: Option<uint> = a.next();
  let b: Counter<uint> = Counter::new(5u, 2);
  let c: TakeIterator<Counter<uint>> = a.take(3);
  let b: TakeIterator<Counter<uint>> = b.take(4);
  let mut c: ChainIterator<TakeIterator<Counter<uint>>,
                           TakeIterator<Counter<uint>>> =
                           c.chain::<TakeIterator<Counter<uint>>>(b);
  let v: ~[uint] = c.to_vec();
  assert!(v == ~[0, 2, 5, 7, 9]);
}

gistfile2.txt

foo.rs:11:27: 11:69 error: cannot determine a type for this bounded type parameter: unconstrained type
foo.rs:11                            c.chain::<TakeIterator<Counter<uint>>>(b);
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

gistfile3.txt

fn main() {
  use std::iterator::*;                 
                                      
  let a = Counter::new(0u, 1).take(2);  
  let b = Counter::new(5u, 2).take(3);  
  let mut c = a.chain(b);               
  let v: ~[uint] = c.to_vec();          
  assert!(v == ~[0, 2, 5, 7, 9]);       
}

gistfile4.txt

foo.rs:6:14: 6:25 error: cannot determine a type for this bounded type parameter: unconstrained type
foo.rs:6   let mut c = a.chain(b);
                       ^~~~~~~~~~~