src/test/run-pass/object-one-type-two-traits.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 // Testing creating two vtables with the same self type, but different
  12 // traits.
  13
  14 #![allow(unknown_features)]
  15 #![feature(box_syntax)]
  16
  17 use std::any::Any;
  18
  19 trait Wrap {
  20     fn get(&self) -> int;
  21     fn wrap(self: Box<Self>) -> Box<Any+'static>;
  22 }
  23
  24 impl Wrap for int {
  25     fn get(&self) -> int {
  26         *self
  27     }
  28     fn wrap(self: Box<int>) -> Box<Any+'static> {
  29         self as Box<Any+'static>
  30     }
  31 }
  32
  33 fn is<T:'static>(x: &Any) -> bool {
  34     x.is::<T>()
  35 }
  36
  37 fn main() {
  38     let x = box 22 as Box<Wrap>;
  39     println!("x={}", x.get());
  40     let y = x.wrap();
  41 }