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// 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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fn main() {}
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