src/test/run-pass/newtype-polymorphic.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11
  12
  13 #[derive(Clone)]
  14 struct myvec<X>(Vec<X> );
  15
  16 fn myvec_deref<X:Clone>(mv: myvec<X>) -> Vec<X> {
  17     let myvec(v) = mv;
  18     return v.clone();
  19 }
  20
  21 fn myvec_elt<X>(mv: myvec<X>) -> X {
  22     let myvec(v) = mv;
  23     return v.into_iter().next().unwrap();
  24 }
  25
  26 pub fn main() {
  27     let mv = myvec(vec![1, 2, 3]);
  28     let mv_clone = mv.clone();
  29     let mv_clone = myvec_deref(mv_clone);
  30     assert_eq!(mv_clone[1], 2);
  31     assert_eq!(myvec_elt(mv.clone()), 1);
  32     let myvec(v) = mv;
  33     assert_eq!(v[2], 3);
  34 }