src/test/run-pass/overloaded-autoderef-indexing.rs

   1 // Copyright 2014 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 use std::ops::Deref;
  13
  14 struct DerefArray<'a, T:'a> {
  15     inner: &'a [T]
  16 }
  17
  18 impl<'a, T> Deref for DerefArray<'a, T> {
  19     type Target = &'a [T];
  20
  21     fn deref<'b>(&'b self) -> &'b &'a [T] {
  22         &self.inner
  23     }
  24 }
  25
  26 pub fn main() {
  27     let a = &[1, 2, 3];
  28     assert_eq!(DerefArray {inner: a}[1], 2);
  29 }