69 lines
1.4 KiB
Rust
69 lines
1.4 KiB
Rust
#![allow(unused)]
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#![warn(clippy::needless_option_as_deref)]
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#![allow(clippy::useless_vec)]
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fn main() {
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// should lint
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let _: Option<&usize> = Some(&1).as_deref();
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let _: Option<&mut usize> = Some(&mut 1).as_deref_mut();
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let mut y = 0;
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let mut x = Some(&mut y);
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let _ = x.as_deref_mut();
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// should not lint
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let _ = Some(Box::new(1)).as_deref();
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let _ = Some(Box::new(1)).as_deref_mut();
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let mut y = 0;
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let mut x = Some(&mut y);
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for _ in 0..3 {
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let _ = x.as_deref_mut();
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}
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let mut y = 0;
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let mut x = Some(&mut y);
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let mut closure = || {
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let _ = x.as_deref_mut();
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};
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closure();
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closure();
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// #7846
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let mut i = 0;
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let mut opt_vec = vec![Some(&mut i)];
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opt_vec[0].as_deref_mut().unwrap();
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let mut i = 0;
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let x = &mut Some(&mut i);
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(*x).as_deref_mut();
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// #8047
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let mut y = 0;
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let mut x = Some(&mut y);
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x.as_deref_mut();
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dbg!(x);
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}
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struct S<'a> {
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opt: Option<&'a mut usize>,
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}
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fn from_field<'a>(s: &'a mut S<'a>) -> Option<&'a mut usize> {
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s.opt.as_deref_mut()
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}
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mod issue_non_copy_13077 {
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pub fn something(mut maybe_side_effect: Option<&mut String>) {
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for _ in 0..10 {
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let _ = S { field: other(maybe_side_effect.as_deref_mut()) };
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}
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}
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fn other(_maybe_side_effect: Option<&mut String>) {
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unimplemented!()
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}
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pub struct S { pub field: () }
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}
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