I tried this code:
struct Foo {
a: i32,
pub b: i32,
}
struct Bar;
impl Bar {
fn a(&self) -> i32 { 5 }
pub fn b(&self) -> i32 { 6 }
}
fn main() {
let _ = Foo { a: 1, b: 2 };
let _ = Bar;
}I expected to see this happen: All of {Foo, Bar}::{a, b} are caught by the dead_code lint. Even though {Foo, Bar}::b are declared pub, they should both inherit the visibility of their parent items since there is no way for external code to access them.
Instead, this happened: No warning is emitted for Foo::b:
warning: field is never read: `a`
--> src/main.rs:2:5
|
2 | a: i32,
| ^^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: associated function is never used: `a`
--> src/main.rs:9:8
|
9 | fn a(&self) -> i32 { 5 }
| ^
warning: associated function is never used: `b`
--> src/main.rs:10:12
|
10 | pub fn b(&self) -> i32 { 6 }
| ^
warning: 3 warnings emitted
Meta
rustc --version --verbose:
1.54.0-nightly
(2021-05-12 21e92b97309e15b16bc6)
I tried this code:
I expected to see this happen: All of
{Foo, Bar}::{a, b}are caught by thedead_codelint. Even though{Foo, Bar}::bare declaredpub, they should both inherit the visibility of their parent items since there is no way for external code to access them.Instead, this happened: No warning is emitted for
Foo::b:Meta
rustc --version --verbose: