| //@ run-pass | |
| struct Element; | |
| macro_rules! foo { | |
| ($tag: expr, $string: expr) => { | |
| if $tag == $string { | |
| let element: Box<_> = Box::new(Element); | |
| unsafe { | |
| return std::mem::transmute::<_, usize>(element); | |
| } | |
| } | |
| } | |
| } | |
| fn bar() -> usize { | |
| foo!("a", "b"); | |
| 0 | |
| } | |
| fn main() { | |
| bar(); | |
| } |