Don't ever warn about #[used] items being dead code.

This commit is contained in:
Eduard-Mihai Burtescu 2017-04-29 23:18:15 +03:00
parent 12e76e24cc
commit c054b2a761
2 changed files with 23 additions and 0 deletions

View File

@ -283,6 +283,12 @@ fn has_allow_dead_code_or_lang_attr(attrs: &[ast::Attribute]) -> bool {
return true;
}
// #[used] also keeps the item alive forcefully,
// e.g. for placing it in a specific section.
if attr::contains_name(attrs, "used") {
return true;
}
let dead_code = lint::builtin::DEAD_CODE.name_lower();
for attr in lint::gather_attrs(attrs) {
match attr {

View File

@ -0,0 +1,17 @@
// Copyright 2017 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.
#![deny(dead_code)]
#![feature(used)]
#[used]
static FOO: u32 = 0;
fn main() {}