44 lines
1.0 KiB
Rust
44 lines
1.0 KiB
Rust
// Copyright 2012-2013 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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#[feature(managed_boxes)];
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use std::cell::RefCell;
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enum maybe_pointy {
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none,
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p(@RefCell<Pointy>),
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}
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struct Pointy {
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a : maybe_pointy,
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d : proc() -> uint,
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}
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fn make_uniq_closure<A:Send>(a: A) -> proc() -> uint {
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let result: proc() -> uint = proc() &a as *A as uint;
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result
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}
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fn empty_pointy() -> @RefCell<Pointy> {
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return @RefCell::new(Pointy {
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a : none,
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d : make_uniq_closure(~"hi")
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})
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}
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pub fn main() {
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let v = empty_pointy();
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{
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let mut vb = v.borrow_mut();
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vb.get().a = p(v);
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}
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}
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