| //@ run-pass |
| |
| // Test argument patterns where we create refs to the inside of |
| // boxes. Make sure that we don't free the box as we match the |
| // pattern. |
| |
| #![feature(deref_patterns)] |
| |
| fn getaddr(deref!(ref x): Box<usize>) -> *const usize { |
| let addr: *const usize = &*x; |
| addr |
| } |
| |
| fn checkval(deref!(ref x): Box<usize>) -> usize { |
| *x |
| } |
| |
| pub fn main() { |
| let obj: Box<_> = Box::new(1); |
| let objptr: *const usize = &*obj; |
| let xptr = getaddr(obj); |
| assert_eq!(objptr, xptr); |
| |
| let obj = Box::new(22); |
| assert_eq!(checkval(obj), 22); |
| } |
