77 lines
1.4 KiB
Rust
77 lines
1.4 KiB
Rust
// edition:2018
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// FIXME: run-rustfix waiting on multi-span suggestions
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#![warn(clippy::ref_binding_to_reference)]
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#![allow(clippy::needless_borrowed_reference)]
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fn f1(_: &str) {}
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macro_rules! m2 {
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($e:expr) => {
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f1(*$e)
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};
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}
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macro_rules! m3 {
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($i:ident) => {
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Some(ref $i)
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};
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}
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#[allow(dead_code)]
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fn main() {
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let x = String::new();
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// Ok, the pattern is from a macro
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let _: &&String = match Some(&x) {
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m3!(x) => x,
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None => return,
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};
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// Err, reference to a &String
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let _: &&String = match Some(&x) {
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Some(ref x) => x,
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None => return,
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};
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// Err, reference to a &String
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let _: &&String = match Some(&x) {
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Some(ref x) => {
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f1(x);
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f1(*x);
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x
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},
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None => return,
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};
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// Err, reference to a &String
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match Some(&x) {
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Some(ref x) => m2!(x),
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None => return,
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}
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// Err, reference to a &String
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let _ = |&ref x: &&String| {
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let _: &&String = x;
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};
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}
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// Err, reference to a &String
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fn f2<'a>(&ref x: &&'a String) -> &'a String {
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let _: &&String = x;
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*x
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}
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trait T1 {
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// Err, reference to a &String
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fn f(&ref x: &&String) {
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let _: &&String = x;
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}
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}
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struct S;
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impl T1 for S {
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// Err, reference to a &String
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fn f(&ref x: &&String) {
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let _: &&String = x;
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}
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}
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