1 // Copyright 2015 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 we mutate a counter on the stack only when we expect to.
13 fn call<F>(f: F) where F : FnOnce() {
18 let y = vec!(format!("Hello"), format!("World"));
19 let mut counter = 22_u32;
22 // Move `y`, but do not move `counter`, even though it is read
23 // by value (note that it is also mutated).
29 assert_eq!(counter, 88);
32 // this mutates a moved copy, and hence doesn't affect original
35 assert_eq!(counter, 88);