102 lines
2.0 KiB
Rust
102 lines
2.0 KiB
Rust
// run-rustfix
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#![allow(
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unused_variables,
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clippy::clone_double_ref,
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clippy::needless_borrow,
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clippy::borrow_deref_ref,
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clippy::explicit_auto_deref
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)]
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#![warn(clippy::explicit_deref_methods)]
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use std::ops::{Deref, DerefMut};
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fn concat(deref_str: &str) -> String {
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format!("{}bar", deref_str)
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}
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fn just_return(deref_str: &str) -> &str {
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deref_str
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}
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struct CustomVec(Vec<u8>);
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impl Deref for CustomVec {
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type Target = Vec<u8>;
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fn deref(&self) -> &Vec<u8> {
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&self.0
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}
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}
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fn main() {
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let a: &mut String = &mut String::from("foo");
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// these should require linting
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let b: &str = a.deref();
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let b: &mut str = a.deref_mut();
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// both derefs should get linted here
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let b: String = format!("{}, {}", a.deref(), a.deref());
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println!("{}", a.deref());
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#[allow(clippy::match_single_binding)]
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match a.deref() {
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_ => (),
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}
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let b: String = concat(a.deref());
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let b = just_return(a).deref();
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let b: String = concat(just_return(a).deref());
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let b: &str = a.deref().deref();
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let opt_a = Some(a.clone());
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let b = opt_a.unwrap().deref();
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// following should not require linting
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let cv = CustomVec(vec![0, 42]);
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let c = cv.deref()[0];
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let b: &str = &*a.deref();
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let b: String = a.deref().clone();
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let b: usize = a.deref_mut().len();
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let b: &usize = &a.deref().len();
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let b: &str = &*a;
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let b: &mut str = &mut *a;
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macro_rules! expr_deref {
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($body:expr) => {
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$body.deref()
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};
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}
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let b: &str = expr_deref!(a);
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let b: &str = expr_deref!(a.deref());
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// The struct does not implement Deref trait
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#[derive(Copy, Clone)]
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struct NoLint(u32);
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impl NoLint {
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pub fn deref(self) -> u32 {
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self.0
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}
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pub fn deref_mut(self) -> u32 {
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self.0
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}
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}
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let no_lint = NoLint(42);
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let b = no_lint.deref();
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let b = no_lint.deref_mut();
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}
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