| // Copyright 2015 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 in a by-ref once closure we move some variables even as |
| // we capture others by mutable reference. |
| |
| |
| fn call<F>(f: F) where F : FnOnce() { |
| f(); |
| } |
| |
| fn main() { |
| let mut x = vec!(format!("Hello")); |
| let y = vec!(format!("World")); |
| call(|| { |
| // Here: `x` must be captured with a mutable reference in |
| // order for us to append on it, and `y` must be captured by |
| // value. |
| for item in y { |
| x.push(item); |
| } |
| }); |
| assert_eq!(x.len(), 2); |
| assert_eq!(&*x[0], "Hello"); |
| assert_eq!(&*x[1], "World"); |
| } |