// Regression test for #74429, where we didn't think that a type parameter
// outlived `ReEmpty`.
// check-pass
use std::marker::PhantomData;
use std::ptr::NonNull;
pub unsafe trait RawData {
type Elem;
}
unsafe impl RawData for OwnedRepr {
type Elem = A;
}
unsafe impl<'a, A> RawData for ViewRepr<&'a A> {
type Elem = A;
}
pub struct OwnedRepr {
ptr: PhantomData,
}
// these Copy impls are not necessary for the repro, but allow the code to compile without error
// on 1.44.1
#[derive(Copy, Clone)]
pub struct ViewRepr {
life: PhantomData,
}
#[derive(Copy, Clone)]
pub struct ArrayBase
where
S: RawData,
{
ptr: NonNull,
}
pub type Array = ArrayBase>;
pub type ArrayView<'a, A> = ArrayBase>;
impl ArrayBase
where
S: RawData,
{
pub fn index_axis(&self) -> ArrayView<'_, A> {
unimplemented!()
}
pub fn axis_iter<'a>(&'a self) -> std::iter::Empty<&'a A> {
unimplemented!()
}
}
pub fn x(a: Array) {
// drop just avoids a must_use warning
drop((0..1).filter(|_| true));
let y = a.index_axis();
a.axis_iter().for_each(|_| {
drop(y);
});
}
fn main() {}