// run-rustfix

#![allow(unused)]
#![warn(clippy::match_as_ref)]

fn match_as_ref() {
    let owned: Option<()> = None;
    let borrowed: Option<&()> = match owned {
        None => None,
        Some(ref v) => Some(v),
    };

    let mut mut_owned: Option<()> = None;
    let borrow_mut: Option<&mut ()> = match mut_owned {
        None => None,
        Some(ref mut v) => Some(v),
    };
}

fn main() {}