src/tools/clippy/tests/ui/useless_attribute.rs

   1 // run-rustfix
   2 // aux-build:proc_macro_derive.rs
   3
   4 #![warn(clippy::useless_attribute)]
   5 #![warn(unreachable_pub)]
   6 #![feature(rustc_private)]
   7
   8 #[allow(dead_code)]
   9 #[cfg_attr(feature = "cargo-clippy", allow(dead_code))]
  10 #[rustfmt::skip]
  11 #[allow(unused_imports)]
  12 #[allow(unused_extern_crates)]
  13 #[macro_use]
  14 extern crate rustc_middle;
  15
  16 #[macro_use]
  17 extern crate proc_macro_derive;
  18
  19 // don't lint on unused_import for `use` items
  20 #[allow(unused_imports)]
  21 use std::collections;
  22
  23 // don't lint on unused for `use` items
  24 #[allow(unused)]
  25 use std::option;
  26
  27 // don't lint on deprecated for `use` items
  28 mod foo {
  29     #[deprecated]
  30     pub struct Bar;
  31 }
  32 #[allow(deprecated)]
  33 pub use foo::Bar;
  34
  35 // This should not trigger the lint. There's lint level definitions inside the external derive
  36 // that would trigger the useless_attribute lint.
  37 #[derive(DeriveSomething)]
  38 struct Baz;
  39
  40 // don't lint on unreachable_pub for `use` items
  41 mod a {
  42     mod b {
  43         #[allow(dead_code)]
  44         #[allow(unreachable_pub)]
  45         pub struct C;
  46     }
  47
  48     #[allow(unreachable_pub)]
  49     pub use self::b::C;
  50 }
  51
  52 // don't lint on clippy::wildcard_imports for `use` items
  53 #[allow(clippy::wildcard_imports)]
  54 pub use std::io::prelude::*;
  55
  56 // don't lint on clippy::enum_glob_use for `use` items
  57 #[allow(clippy::enum_glob_use)]
  58 pub use std::cmp::Ordering::*;
  59
  60 fn test_indented_attr() {
  61     #[allow(clippy::almost_swapped)]
  62     use std::collections::HashSet;
  63
  64     let _ = HashSet::<u32>::default();
  65 }
  66
  67 fn main() {
  68     test_indented_attr();
  69 }