1 // Copyright 2012-2013-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Test that cross-borrowing (implicitly converting from `Box<T>` to `&T`) is
12 // forbidden when `T` is a trait.
14 #![feature(box_syntax)]
17 trait Trait { fn foo(&self) {} }
21 let x: Box<Trait> = box Foo;
22 let _y: &Trait = x; //~ ERROR mismatched types
23 //~| expected `&Trait`
24 //~| found `Box<Trait>`