53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-pass
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#![feature(stmt_expr_attributes)]
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#![warn(unused_attributes)] //~ NOTE lint level defined here
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fn foo<#[derive(Debug)] T>() { //~ WARN unused attribute
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match 0 {
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#[derive(Debug)] //~ WARN unused attribute
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_ => (),
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}
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}
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fn main() {
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// fold_stmt (Item)
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#[allow(dead_code)]
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#[derive(Debug)] // should not warn
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struct Foo;
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// fold_stmt (Mac)
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#[derive(Debug)]
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//~^ WARN `#[derive]` does nothing on macro invocations
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//~| NOTE this may become a hard error in a future release
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println!("Hello, world!");
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// fold_stmt (Semi)
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#[derive(Debug)] //~ WARN unused attribute
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"Hello, world!";
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// fold_stmt (Local)
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#[derive(Debug)] //~ WARN unused attribute
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let _ = "Hello, world!";
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// fold_expr
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let _ = #[derive(Debug)] "Hello, world!";
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//~^ WARN unused attribute
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let _ = [
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// fold_opt_expr
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#[derive(Debug)] //~ WARN unused attribute
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"Hello, world!"
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];
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}
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