| // Copyright 2012-2013-2014 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. |
| |
| // Test that cross-borrowing (implicitly converting from `Box<T>` to `&T`) is |
| // forbidden when `T` is a trait. |
| |
| struct Foo; |
| trait Trait { fn foo(&self) {} } |
| impl Trait for Foo {} |
| |
| pub fn main() { |
| let x: Box<Trait> = Box::new(Foo); |
| let _y: &Trait = x; //~ ERROR E0308 |
| //~| expected type `&dyn Trait` |
| //~| found type `std::boxed::Box<dyn Trait>` |
| } |
