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// revisions: stock precise
#![feature(const_trait_impl)]
#![feature(const_mut_refs)]
#![cfg_attr(precise, feature(const_precise_live_drops))]
use std::marker::{Destruct, PhantomData};
struct NonTrivialDrop;
impl Drop for NonTrivialDrop {
fn drop(&mut self) {
println!("Non trivial drop");
}
}
struct ConstImplWithDropGlue(NonTrivialDrop);
impl const Drop for ConstImplWithDropGlue {
fn drop(&mut self) {}
}
#[const_trait]
trait A { fn a() { } }
impl A for NonTrivialDrop {}
struct ConstDropImplWithBounds<T: ~const A>(PhantomData<T>);
impl<T: ~const A> const Drop for ConstDropImplWithBounds<T> {
fn drop(&mut self) {
T::a();
}
}
const fn check<T: ~const Destruct>(_: T) {}
macro_rules! check_all {
($($exp:expr),*$(,)?) => {$(
const _: () = check($exp);
)*};
}
check_all! {
NonTrivialDrop,
//~^ ERROR can't drop
ConstImplWithDropGlue(NonTrivialDrop),
//~^ ERROR can't drop
ConstDropImplWithBounds::<NonTrivialDrop>(PhantomData),
//~^ ERROR the trait bound
//~| ERROR the trait bound
}
struct ConstDropImplWithNonConstBounds<T: A>(PhantomData<T>);
impl<T: ~const A> const Drop for ConstDropImplWithNonConstBounds<T> {
//~^ ERROR `Drop` impl requires `T: ~const A` but the struct it is implemented for does not
fn drop(&mut self) {
T::a();
}
}
fn main() {}
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