32 lines
968 B
Rust
32 lines
968 B
Rust
// Copyright 2012 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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#![allow(unknown_features)]
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#![feature(box_syntax)]
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#![feature(unboxed_closures, core)]
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struct closure_box<'a> {
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cl: Box<FnMut() + 'a>,
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}
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fn box_it<'a>(x: Box<FnMut() + 'a>) -> closure_box<'a> {
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closure_box {cl: x}
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}
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fn call_static_closure(mut cl: closure_box<'static>) {
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cl.cl.call_mut(())
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}
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pub fn main() {
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// FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
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let cl_box = box_it(Box::new(|| println!("Hello, world!")));
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call_static_closure(cl_box);
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}
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