118 lines
2.1 KiB
Rust
118 lines
2.1 KiB
Rust
#![allow(
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unused,
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dead_code,
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clippy::needless_lifetimes,
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clippy::needless_pass_by_value,
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clippy::needless_arbitrary_self_type
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)]
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#![warn(clippy::extra_unused_lifetimes)]
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fn empty() {}
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fn used_lt<'a>(x: &'a u8) {}
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fn unused_lt<'a>(x: u8) {}
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fn unused_lt_transitive<'a, 'b: 'a>(x: &'b u8) {
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// 'a is useless here since it's not directly bound
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}
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fn lt_return<'a, 'b: 'a>(x: &'b u8) -> &'a u8 {
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panic!()
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}
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fn lt_return_only<'a>() -> &'a u8 {
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panic!()
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}
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fn unused_lt_blergh<'a>(x: Option<Box<dyn Send + 'a>>) {}
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trait Foo<'a> {
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fn x(&self, a: &'a u8);
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}
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impl<'a> Foo<'a> for u8 {
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fn x(&self, a: &'a u8) {}
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}
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struct Bar;
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impl Bar {
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fn x<'a>(&self) {}
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}
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// test for #489 (used lifetimes in bounds)
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pub fn parse<'a, I: Iterator<Item = &'a str>>(_it: &mut I) {
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unimplemented!()
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}
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pub fn parse2<'a, I>(_it: &mut I)
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where
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I: Iterator<Item = &'a str>,
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{
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unimplemented!()
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}
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struct X {
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x: u32,
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}
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impl X {
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fn self_ref_with_lifetime<'a>(&'a self) {}
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fn explicit_self_with_lifetime<'a>(self: &'a Self) {}
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}
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// Methods implementing traits must have matching lifetimes
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mod issue4291 {
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trait BadTrait {
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fn unused_lt<'a>(x: u8) {}
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}
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impl BadTrait for () {
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fn unused_lt<'a>(_x: u8) {}
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}
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}
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mod issue6437 {
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pub struct Scalar;
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impl<'a> std::ops::AddAssign<&Scalar> for &mut Scalar {
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fn add_assign(&mut self, _rhs: &Scalar) {
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unimplemented!();
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}
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}
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impl<'b> Scalar {
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pub fn something<'c>() -> Self {
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Self
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}
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}
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}
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// https://github.com/rust-lang/rust-clippy/pull/8737#pullrequestreview-951268213
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mod first_case {
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use serde::de::Visitor;
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pub trait Expected {
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fn fmt(&self, formatter: &mut std::fmt::Formatter);
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}
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impl<'de, T> Expected for T
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where
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T: Visitor<'de>,
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{
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fn fmt(&self, formatter: &mut std::fmt::Formatter) {}
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}
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}
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// https://github.com/rust-lang/rust-clippy/pull/8737#pullrequestreview-951268213
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mod second_case {
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pub trait Source {
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fn hey();
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}
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impl<'a, T: Source + ?Sized + 'a> Source for Box<T> {
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fn hey() {}
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}
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}
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fn main() {}
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