Skip to content

Visit ImplItem in dead_code lint #59486

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Mar 29, 2019
Merged

Visit ImplItem in dead_code lint #59486

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
b3011dd
Visit ItemKind::Impl for dead code lint
varkor Mar 28, 2019
40db575
Add a regression test for #47131
varkor Mar 28, 2019
8cdfad9
Walk all items for dead_code lint by default
varkor Mar 28, 2019
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions src/librustc/middle/dead.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,7 @@ impl<'a, 'tcx> MarkSymbolVisitor<'a, 'tcx> {
| hir::ItemKind::Ty(..)
| hir::ItemKind::Static(..)
| hir::ItemKind::Existential(..)
| hir::ItemKind::Impl(..)
| hir::ItemKind::Const(..) => {
intravisit::walk_item(self, &item);
}
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Remove _ => () and replace with "exhaustive" match to avoid future problems?

Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I'm not actually sure why this is not

_ => {
    intravisit::walk_item(self, &item);
}

If that doesn't break anything, then walk_item can be moved out of the match.

Expand Down
17 changes: 17 additions & 0 deletions src/test/ui/dead-code-impl.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
// run-pass

#![deny(dead_code)]

pub struct GenericFoo<T>(T);

type Foo = GenericFoo<u32>;

impl Foo {
fn bar(self) -> u8 {
0
}
}

fn main() {
println!("{}", GenericFoo(0).bar());
}