| // build-pass (FIXME(62277): could be check-pass?) |
| |
| #![feature(stmt_expr_attributes)] |
| #![warn(unused_attributes)] //~ NOTE lint level defined here |
| |
| fn foo<#[derive(Debug)] T>() { //~ WARN unused attribute |
| match 0 { |
| #[derive(Debug)] //~ WARN unused attribute |
| _ => (), |
| } |
| } |
| |
| fn main() { |
| // fold_stmt (Item) |
| #[allow(dead_code)] |
| #[derive(Debug)] // should not warn |
| struct Foo; |
| |
| // fold_stmt (Mac) |
| #[derive(Debug)] |
| //~^ WARN `#[derive]` does nothing on macro invocations |
| //~| NOTE this may become a hard error in a future release |
| println!("Hello, world!"); |
| |
| // fold_stmt (Semi) |
| #[derive(Debug)] //~ WARN unused attribute |
| "Hello, world!"; |
| |
| // fold_stmt (Local) |
| #[derive(Debug)] //~ WARN unused attribute |
| let _ = "Hello, world!"; |
| |
| // visit_expr |
| let _ = #[derive(Debug)] "Hello, world!"; |
| //~^ WARN unused attribute |
| |
| let _ = [ |
| // filter_map_expr |
| #[derive(Debug)] //~ WARN unused attribute |
| "Hello, world!" |
| ]; |
| } |
