rust-clippy/tests/ui/useless_attribute.rs

#![warn(useless_attribute)]

#[allow(dead_code, unused_extern_crates)]
#[cfg_attr(feature = "cargo-clippy", allow(dead_code, unused_extern_crates))]
#[cfg_attr(feature = "cargo-clippy",
           allow(dead_code, unused_extern_crates))]
extern crate clippy_lints;

// don't lint on unused_import for `use` items
#[allow(unused_imports)]
use std::collections;

// don't lint on deprecated for `use` items
mod foo { #[deprecated] pub struct Bar; }
#[allow(deprecated)]
pub use foo::Bar;

fn main() {}