Given the following code:
pub fn thing<'a>(_s: &'a str) where 'a: 'static { }The current output is:
warning: unnecessary lifetime parameter `'a`
--> src/lib.rs:2:37
|
2 | pub fn thing<'a>(_s: &'a str) where 'a: 'static { }
| ^^
|
= help: you can use the `'static` lifetime directly, in place of `'a`
warning: `playground` (lib) generated 1 warning
Finished dev [unoptimized + debuginfo] target(s) in 1.27s
Ideally the output should also say something like this:
= note: `#[warn(needless_lifetimes)]` on by default
And of course then #[allow(needless_lifetimes)] ought to work.
Versions affected
rustcargo@zealot:/volatile/rustcargo/Rustup/Game/server$ rustc -vV
rustc 1.62.0-nightly (ecd44958e 2022-05-10)
binary: rustc
commit-hash: ecd44958e0a21110d09862ee080d95a4ca6c52f8
commit-date: 2022-05-10
host: x86_64-unknown-linux-gnu
release: 1.62.0-nightly
LLVM version: 14.0.1
rustcargo@zealot:/volatile/rustcargo/Rustup/Game/server$
The example code is accepted without any complaint by stable and beta, However, in both stable and beta, clippy has the same weird name-less complaint. And saying #![allow(clippy::needless_lifetimes)] doesn't suppress the message.
I searched for "lifetime" in the clippy lints db. Of those that came up, needless_lifetimes and redundant_static_lifetimes seemed like they might be it, but neither of those suppresses the lint on stable's clippy.
Given the following code:
The current output is:
Ideally the output should also say something like this:
And of course then
#[allow(needless_lifetimes)]ought to work.Versions affected
The example code is accepted without any complaint by stable and beta, However, in both stable and beta, clippy has the same weird name-less complaint. And saying
#![allow(clippy::needless_lifetimes)]doesn't suppress the message.I searched for "lifetime" in the clippy lints db. Of those that came up,
needless_lifetimesandredundant_static_lifetimesseemed like they might be it, but neither of those suppresses the lint on stable's clippy.