mirror of https://github.com/rust-lang/rust
39 lines
596 B
Rust
39 lines
596 B
Rust
//@ 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);
|
|
}
|