mirror of https://github.com/rust-lang/rust
46 lines
1016 B
Rust
46 lines
1016 B
Rust
//@ run-pass
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#![allow(dead_code)]
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struct DroppableStruct;
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enum DroppableEnum {
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DroppableVariant1, DroppableVariant2
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}
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static mut DROPPED: bool = false;
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impl Drop for DroppableStruct {
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fn drop(&mut self) {
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unsafe { DROPPED = true; }
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}
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}
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impl Drop for DroppableEnum {
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fn drop(&mut self) {
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unsafe { DROPPED = true; }
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}
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}
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trait MyTrait { fn dummy(&self) { } }
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impl MyTrait for Box<DroppableStruct> {}
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impl MyTrait for Box<DroppableEnum> {}
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struct Whatever { w: Box<dyn MyTrait+'static> }
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impl Whatever {
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fn new(w: Box<dyn MyTrait+'static>) -> Whatever {
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Whatever { w: w }
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}
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}
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fn main() {
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{
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let f: Box<_> = Box::new(DroppableStruct);
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let _a = Whatever::new(Box::new(f) as Box<dyn MyTrait>);
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}
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assert!(unsafe { DROPPED });
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unsafe { DROPPED = false; }
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{
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let f: Box<_> = Box::new(DroppableEnum::DroppableVariant1);
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let _a = Whatever::new(Box::new(f) as Box<dyn MyTrait>);
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}
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assert!(unsafe { DROPPED });
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}
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