src/test/run-pass/issue-51907.rs


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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

trait Foo {
    extern fn borrow(&self);
    extern fn take(self: Box<Self>);
}

struct Bar;
impl Foo for Bar {
    extern fn borrow(&self) {}
    extern fn take(self: Box<Self>) {}
}

fn main() {
    let foo: Box<dyn Foo> = Box::new(Bar);
    foo.borrow();
    foo.take()
}