e0ede9c6b3
This PR is the outcome of the library stabilization meeting for the `liballoc::owned` and `libcore::cell` modules. Aside from the stability attributes, there are a few breaking changes: * The `owned` modules is now named `boxed`, to better represent its contents. (`box` was unavailable, since it's a keyword.) This will help avoid the misconception that `Box` plays a special role wrt ownership. * The `AnyOwnExt` extension trait is renamed to `BoxAny`, and its `move` method is renamed to `downcast`, in both cases to improve clarity. * The recently-added `AnySendOwnExt` extension trait is removed; it was not being used and is unnecessary. [breaking-change]
32 lines
884 B
Rust
32 lines
884 B
Rust
// Copyright 2013 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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// Make sure the destructor is run for unit-like structs.
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use std::boxed::BoxAny;
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use std::task;
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struct Foo;
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impl Drop for Foo {
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fn drop(&mut self) {
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fail!("This failure should happen.");
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}
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}
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pub fn main() {
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let x = task::try(proc() {
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let _b = Foo;
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});
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let s = x.unwrap_err().downcast::<&'static str>().unwrap();
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assert_eq!(s.as_slice(), "This failure should happen.");
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}
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