rust/src/test/run-pass/resource-destruct.rs
2012-12-10 17:32:58 -08:00

37 lines
994 B
Rust

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
struct shrinky_pointer {
i: @@mut int,
}
impl shrinky_pointer : Drop {
fn finalize(&self) {
log(error, ~"Hello!"); **(self.i) -= 1;
}
}
impl shrinky_pointer {
fn look_at() -> int { return **(self.i); }
}
fn shrinky_pointer(i: @@mut int) -> shrinky_pointer {
shrinky_pointer {
i: i
}
}
fn main() {
let my_total = @@mut 10;
{ let pt = move shrinky_pointer(my_total); assert (pt.look_at() == 10); }
log(error, fmt!("my_total = %d", **my_total));
assert (**my_total == 9);
}