| fn get_pair(_a: &mut u32, _b: &mut u32) {} | |
| macro_rules! x10 { | |
| ($($t:tt)*) => { | |
| $($t)* $($t)* $($t)* $($t)* $($t)* | |
| $($t)* $($t)* $($t)* $($t)* $($t)* | |
| } | |
| } | |
| #[allow(unused_assignments)] | |
| fn main() { | |
| let mut x = 1; | |
| get_pair(&mut x, &mut x); | |
| //~^ ERROR: cannot borrow `x` as mutable more than once at a time | |
| x10! { x10!{ x10!{ if x > 0 { x += 2 } else { x += 1 } } } } | |
| } |