4 #![warn(clippy::match_as_ref)]
7 let owned: Option<()> = None;
8 let borrowed: Option<&()> = match owned {
10 Some(ref v) => Some(v),
13 let mut mut_owned: Option<()> = None;
14 let borrow_mut: Option<&mut ()> = match mut_owned {
16 Some(ref mut v) => Some(v),