rust/src/test/compile-fail/issue-2548.rs

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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.
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// A test case for #2548.
struct foo {
x: @mut int,
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}
#[unsafe_destructor]
impl Drop for foo {
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fn drop(&self) {
unsafe {
println("Goodbye, World!");
*self.x += 1;
}
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}
}
fn foo(x: @mut int) -> foo {
foo { x: x }
}
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fn main() {
let x = @mut 0;
{
let mut res = foo(x);
let mut v = ~[];
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v = ~[(res)] + v; //~ failed to find an implementation of trait
assert_eq!(v.len(), 2);
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}
assert_eq!(*x, 1);
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}