36 lines
733 B
Rust
36 lines
733 B
Rust
// run-rustfix
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#![allow(unused)]
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#![warn(clippy::match_as_ref)]
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fn match_as_ref() {
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let owned: Option<()> = None;
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let borrowed: Option<&()> = owned.as_ref();
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let mut mut_owned: Option<()> = None;
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let borrow_mut: Option<&mut ()> = mut_owned.as_mut();
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}
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mod issue4437 {
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use std::{error::Error, fmt, num::ParseIntError};
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#[derive(Debug)]
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struct E {
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source: Option<ParseIntError>,
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}
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impl Error for E {
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fn source(&self) -> Option<&(dyn Error + 'static)> {
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self.source.as_ref().map(|x| x as _)
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}
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}
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impl fmt::Display for E {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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unimplemented!()
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}
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}
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}
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fn main() {}
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