| // run-pass | |
| #![allow(non_shorthand_field_patterns)] | |
| #![feature(box_syntax)] | |
| struct Pair { a: Box<isize>, b: Box<isize> } | |
| pub fn main() { | |
| let mut x: Box<_> = box Pair {a: box 10, b: box 20}; | |
| let x_internal = &mut *x; | |
| match *x_internal { | |
| Pair {a: ref mut a, b: ref mut _b} => { | |
| assert_eq!(**a, 10); | |
| *a = box 30; | |
| assert_eq!(**a, 30); | |
| } | |
| } | |
| } |