34 lines
509 B
Rust
34 lines
509 B
Rust
// run-pass
|
|
static mut DROP_RAN: bool = false;
|
|
|
|
trait Bar {
|
|
fn do_something(&mut self); //~ WARN method `do_something` is never used
|
|
}
|
|
|
|
struct BarImpl;
|
|
|
|
impl Bar for BarImpl {
|
|
fn do_something(&mut self) {}
|
|
}
|
|
|
|
|
|
struct Foo<B: Bar>(#[allow(dead_code)] B);
|
|
|
|
impl<B: Bar> Drop for Foo<B> {
|
|
fn drop(&mut self) {
|
|
unsafe {
|
|
DROP_RAN = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
fn main() {
|
|
{
|
|
let _x: Foo<BarImpl> = Foo(BarImpl);
|
|
}
|
|
unsafe {
|
|
assert_eq!(DROP_RAN, true);
|
|
}
|
|
}
|