| // Copyright 2012 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 we detect nested calls that could free pointers evaluated |
| // for earlier arguments. |
| |
| #![feature(box_syntax)] |
| |
| fn rewrite(v: &mut Box<usize>) -> usize { |
| *v = box 22; |
| **v |
| } |
| |
| fn add(v: &usize, w: Box<usize>) -> usize { |
| *v + *w |
| } |
| |
| fn implicit() { |
| let mut a: Box<_> = box 1; |
| |
| // Note the danger here: |
| // |
| // the pointer for the first argument has already been |
| // evaluated, but it gets moved when evaluating the second |
| // argument! |
| add( |
| &*a, |
| a); //~ ERROR cannot move |
| } |
| |
| fn explicit() { |
| let mut a: Box<_> = box 1; |
| add( |
| &*a, |
| a); //~ ERROR cannot move |
| } |
| |
| fn main() {} |
