47 lines
1015 B
Rust
47 lines
1015 B
Rust
// run-pass
|
|
#![allow(dead_code)]
|
|
#![feature(box_syntax)]
|
|
|
|
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 DroppableStruct;
|
|
let _a = Whatever::new(box f as Box<dyn MyTrait>);
|
|
}
|
|
assert!(unsafe { DROPPED });
|
|
unsafe { DROPPED = false; }
|
|
{
|
|
let f: Box<_> = box DroppableEnum::DroppableVariant1;
|
|
let _a = Whatever::new(box f as Box<dyn MyTrait>);
|
|
}
|
|
assert!(unsafe { DROPPED });
|
|
}
|