rust/tests/ui/useless_attribute.rs

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//@run-rustfix
//@aux-build:proc_macro_derive.rs
#![allow(unused)]
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#![warn(clippy::useless_attribute)]
#![warn(unreachable_pub)]
#![feature(rustc_private)]
#[allow(dead_code)]
#[cfg_attr(feature = "cargo-clippy", allow(dead_code))]
#[rustfmt::skip]
#[allow(unused_imports)]
#[allow(unused_extern_crates)]
#[macro_use]
extern crate rustc_middle;
#[macro_use]
extern crate proc_macro_derive;
fn test_indented_attr() {
#[allow(clippy::almost_swapped)]
use std::collections::HashSet;
let _ = HashSet::<u32>::default();
}
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// don't lint on unused_import for `use` items
#[allow(unused_imports)]
use std::collections;
// don't lint on unused for `use` items
#[allow(unused)]
use std::option;
// don't lint on deprecated for `use` items
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mod foo {
#[deprecated]
pub struct Bar;
}
#[allow(deprecated)]
pub use foo::Bar;
// This should not trigger the lint. There's lint level definitions inside the external derive
// that would trigger the useless_attribute lint.
#[derive(DeriveSomething)]
struct Baz;
// don't lint on unreachable_pub for `use` items
mod a {
mod b {
#[allow(dead_code)]
#[allow(unreachable_pub)]
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pub struct C;
}
#[allow(unreachable_pub)]
pub use self::b::C;
}
// don't lint on clippy::wildcard_imports for `use` items
#[allow(clippy::wildcard_imports)]
pub use std::io::prelude::*;
// don't lint on clippy::enum_glob_use for `use` items
#[allow(clippy::enum_glob_use)]
pub use std::cmp::Ordering::*;
// don't lint on clippy::redundant_pub_crate
mod c {
#[allow(clippy::redundant_pub_crate)]
pub(crate) struct S;
}
// https://github.com/rust-lang/rust-clippy/issues/7511
pub mod split {
#[allow(clippy::module_name_repetitions)]
pub use regex::SplitN;
}
// https://github.com/rust-lang/rust-clippy/issues/8768
#[allow(clippy::single_component_path_imports)]
use regex;
fn main() {
test_indented_attr();
}