// run-rustfix

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

fn match_as_ref() {
    let owned: Option<()> = None;
    let borrowed: Option<&()> = owned.as_ref();

    let mut mut_owned: Option<()> = None;
    let borrow_mut: Option<&mut ()> = mut_owned.as_mut();
}

fn main() {}