| // Copyright 2018 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // compile-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!"; |
| |
| // fold_expr |
| let _ = #[derive(Debug)] "Hello, world!"; |
| //~^ WARN unused attribute |
| |
| let _ = [ |
| // fold_opt_expr |
| #[derive(Debug)] //~ WARN unused attribute |
| "Hello, world!" |
| ]; |
| } |
