33 lines
893 B
Rust
33 lines
893 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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#![feature(box_syntax)]
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struct Foo {
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x: isize
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}
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impl Drop for Foo {
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fn drop(&mut self) {
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println!("drop {}", self.x);
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}
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}
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fn main() {
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let mut ptr: Box<_> = box Foo { x: 0 };
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let mut test = |foo: &Foo| {
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println!("access {}", foo.x);
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ptr = box Foo { x: ptr.x + 1 };
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println!("access {}", foo.x);
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};
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test(&*ptr);
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//~^ ERROR: cannot borrow `*ptr` as immutable
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}
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