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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.
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.
12 #![allow(unknown_features)]
13 #![feature(box_syntax)]
16 fn double(self: Box
<Self>) -> usize;
19 impl double
for usize {
20 fn double(self: Box
<usize>) -> usize { *self * 2 }
24 let x
: Box
<Box
<_
>> = box box 3;
25 assert_eq
!(x
.double(), 6);