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// run-pass
#![allow(dead_code)]
struct DroppableStruct;
enum DroppableEnum {
DroppableVariant1, DroppableVariant2
}
static mut DROPPED: bool = false;
impl Drop for DroppableStruct {
fn drop(&mut self) {
unsafe { DROPPED = true; }
}
}
impl Drop for DroppableEnum {
fn drop(&mut self) {
unsafe { DROPPED = true; }
}
}
trait MyTrait { fn dummy(&self) { } }
impl MyTrait for Box<DroppableStruct> {}
impl MyTrait for Box<DroppableEnum> {}
struct Whatever { w: Box<dyn MyTrait+'static> }
impl Whatever {
fn new(w: Box<dyn MyTrait+'static>) -> Whatever {
Whatever { w: w }
}
}
fn main() {
{
let f: Box<_> = Box::new(DroppableStruct);
let _a = Whatever::new(Box::new(f) as Box<dyn MyTrait>);
}
assert!(unsafe { DROPPED });
unsafe { DROPPED = false; }
{
let f: Box<_> = Box::new(DroppableEnum::DroppableVariant1);
let _a = Whatever::new(Box::new(f) as Box<dyn MyTrait>);
}
assert!(unsafe { DROPPED });
}
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