foo.rs

struct NotFancy<T> {
   x: Option<T>
}

impl<T> NotFancy<T> {
   fn simple0<'a>(&'a self) -> Option<&'a T> {
      match *self.x {
         Some(ref t) => Some(t),
         None    => None
      }   
   }   
   fn simple1<'a>(&'a mut self) -> Option<&'a mut T> {
      match *self.x {
         Some(ref mut t) => Some(t),
         None    => None
      }   
   }   
   fn simple2(self) -> Option<T> {
      match self.x {
         Some(t) => Some(t),
         None    => None
      }   
   }   
}