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//@ check-pass
//
// rust-lang/rust#74933: Lifetime error when indexing with borrowed index
use std::ops::{Index, IndexMut};
struct S(V);
struct K<'a>(&'a ());
struct V;
impl<'a> Index<&'a K<'a>> for S {
type Output = V;
fn index(&self, _: &'a K<'a>) -> &V {
&self.0
}
}
impl<'a> IndexMut<&'a K<'a>> for S {
fn index_mut(&mut self, _: &'a K<'a>) -> &mut V {
&mut self.0
}
}
impl V {
fn foo(&mut self) {}
}
fn test(s: &mut S, k: &K<'_>) {
s[k] = V;
s[k].foo();
}
fn main() {
let mut s = S(V);
let k = K(&());
test(&mut s, &k);
}
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