29 lines
827 B
Rust
29 lines
827 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![allow(unknown_features)]
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#![feature(box_syntax)]
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fn borrow<F>(x: &int, f: F) where F: FnOnce(&int) {
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f(x)
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}
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fn test1(x: &Box<int>) {
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borrow(&*(*x).clone(), |p| {
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let x_a = &**x as *const int;
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assert!((x_a as uint) != (p as *const int as uint));
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assert_eq!(unsafe{*x_a}, *p);
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})
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}
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pub fn main() {
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test1(&box 22);
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}
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