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rust-clippy/tests/ui/match_as_ref.rs

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// 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),
};
}
mod issue4437 {
use std::{error::Error, fmt, num::ParseIntError};
#[derive(Debug)]
struct E {
source: Option<ParseIntError>,
}
impl Error for E {
fn source(&self) -> Option<&(dyn Error + 'static)> {
match self.source {
Some(ref s) => Some(s),
None => None,
}
}
}
impl fmt::Display for E {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
unimplemented!()
}
}
}
fn main() {}