Closed
Description
Summary
Clippy wrongly detect a lifetime which could be elided.
Lint Name
needless_lifetimes
Reproducer
I tried this code:
use std::collections::HashMap;
pub struct MyContainer(HashMap<u8, u32>);
impl MyContainer {
pub fn iter<'a>(&'a self) -> impl Iterator<Item = (&'a u8, &'a u32)> + 'a {
self.0.iter()
}
}I saw this happen:
warning: the following explicit lifetimes could be elided: 'a
--> test_clippy.rs:6:5
|
6 | pub fn iter<'a>(&'a self) -> impl Iterator<Item = (&'a u8, &'a u32)> + 'a {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
= note: `#[warn(clippy::needless_lifetimes)]` on by default
help: elide the lifetimes
|
6 - pub fn iter<'a>(&'a self) -> impl Iterator<Item = (&'a u8, &'a u32)> + 'a {
6 + pub fn iter(&self) -> impl Iterator<Item = (&'_ u8, &'a u32)> + 'a {
|
warning: 1 warning emitted
I expected to see this happen:
Lifetime 'a cannot be elided. Clippy should not emit a warning.
Version
`clippy-driver -V` : `clippy 0.1.73 (8131b97 2023-08-02)`
`rustc -Vv` :
rustc 1.73.0-nightly (8131b9774 2023-08-02)
binary: rustc
commit-hash: 8131b9774ebcb6c162fcac71545a13543ec369e7
commit-date: 2023-08-02
host: x86_64-unknown-linux-gnu
release: 1.73.0-nightly
LLVM version: 16.0.5
### Additional Labels
_No response_
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