clippy::redundant_static_lifetimes: constants have by default a `'static` lifetime

What you see

warning: constants have by default a `'static` lifetime
 --> main.rs:3:13
  |
3 | const FOO: &'static [(&'static str, &'static str, fn(&Bar) -> bool)] =
  |            -^^^^^^^------------------------------------------------- help: consider removing `'static`: `&[(&'static str, &'static str, fn(&Bar) -> bool)]`
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/stable/index.html#redundant_static_lifetimes
  = note: `#[warn(clippy::redundant_static_lifetimes)]` on by default

Real output of Clippy 0.1.99 (Rust 1.99) on the example below. Names and line numbers in yours will differ.

Does it matter?

Adding 'static to every reference can create very complicated types.

Code that works but is not idiomatic Rust. Warns by default.

How to fix it

Clippy can fix this one for you: run cargo clippy --fix (add --allow-dirty if you have uncommitted changes). Review the diff before you commit.

Flagged

const FOO: &'static [(&'static str, &'static str, fn(&Bar) -> bool)] =
&[...]
static FOO: &'static [(&'static str, &'static str, fn(&Bar) -> bool)] =
&[...]

Write this instead

 const FOO: &[(&str, &str, fn(&Bar) -> bool)] = &[...]
 static FOO: &[(&str, &str, fn(&Bar) -> bool)] = &[...]

Turn it off, or on

Allow it where it does not fit your code, as narrowly as you can:

#[allow(clippy::redundant_static_lifetimes)]
fn my_function() { /* ... */ }

[lints.clippy]
redundant_static_lifetimes = "allow"

cargo clippy -- -A clippy::redundant-static-lifetimes

The [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.

Settings in clippy.toml

• msrv: The minimum rust version that the project supports. Defaults to the rust-version field in Cargo.toml