ade807c6dc
This removes all remnants of `@` pointers from rustc. Additionally, this removes the `GC` structure from the prelude as it seems odd exporting an experimental type in the prelude by default. Closes #14193 [breaking-change]
39 lines
945 B
Rust
39 lines
945 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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// exec-env:RUST_POISON_ON_FREE=1
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// Test that we root `x` even though it is found in immutable memory,
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// because it is moved.
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#![feature(managed_boxes)]
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use std::gc::{Gc, GC};
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fn free<T>(x: Gc<T>) {}
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struct Foo {
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f: Gc<Bar>
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}
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struct Bar {
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g: int
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}
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fn lend(x: Gc<Foo>) -> int {
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let y = &x.f.g;
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free(x); // specifically here, if x is not rooted, it will be freed
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*y
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}
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pub fn main() {
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assert_eq!(lend(box(GC) Foo {f: box(GC) Bar {g: 22}}), 22);
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}
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