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// 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.
// xfail-fast
struct Arg<T> {val: T, fin: extern fn(T)}
struct finish<T> {
arg: Arg<T>
}
#[unsafe_destructor]
impl<T:Copy> Drop for finish<T> {
fn drop(&self) {
unsafe {
(self.arg.fin)(copy self.arg.val);
}
}
}
fn finish<T:Copy>(arg: Arg<T>) -> finish<T> {
finish {
arg: arg
}
}
pub fn main() {
let box = @mut 10;
fn dec_box(i: @mut int) { *i -= 1; }
{ let _i = finish(Arg{val: box, fin: dec_box}); }
assert_eq!(*box, 9);
}
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