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#![feature(rustc_attrs)]
macro_rules! width(
($this:expr) => {
$this.width.unwrap()
//~^ ERROR cannot use `self.width` because it was mutably borrowed
}
);
struct HasInfo {
width: Option<usize>
}
impl HasInfo {
fn get_size(&mut self, n: usize) -> usize {
n
}
fn get_other(&mut self) -> usize {
let r = &mut *self;
r.get_size(width!(self))
}
// Above is like `self.get_size(width!(self))`, but it
// deliberately avoids NLL's two phase borrow feature.
}
fn main() { }
|
