src/test/ui/deref-on-ref.rs

   1 // run-pass
   2 // Test that `&T` and `&mut T` implement `Deref<T>`
   3
   4
   5 use std::ops::Deref;
   6
   7 fn deref<U:Copy,T:Deref<Target=U>>(t: T) -> U {
   8     *t
   9 }
  10
  11 fn main() {
  12     let x: isize = 3;
  13     let y = deref(&x);
  14     assert_eq!(y, 3);
  15
  16     let mut x: isize = 4;
  17     let y = deref(&mut x);
  18     assert_eq!(y, 4);
  19 }