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// Checks that derived implementations of Clone and Debug do not
// contribute to dead code analysis (issue #84647).
#![forbid(dead_code)]
struct A { f: () }
//~^ ERROR: field `f` is never read
#[derive(Clone)]
struct B { f: () }
//~^ ERROR: field `f` is never read
#[derive(Debug)]
struct C { f: () }
//~^ ERROR: field `f` is never read
#[derive(Debug,Clone)]
struct D { f: () }
//~^ ERROR: field `f` is never read
struct E { f: () }
//~^ ERROR: field `f` is never read
// Custom impl, still doesn't read f
impl Clone for E {
fn clone(&self) -> Self {
Self { f: () }
}
}
struct F { f: () }
// Custom impl that actually reads f
impl Clone for F {
fn clone(&self) -> Self {
Self { f: self.f }
}
}
fn main() {
let _ = A { f: () };
let _ = B { f: () };
let _ = C { f: () };
let _ = D { f: () };
let _ = E { f: () };
let _ = F { f: () };
}
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