rust/tests/ui/issues/issue-32008.rs
2023-01-11 09:32:08 +00:00

29 lines
647 B
Rust

// run-pass
#![allow(dead_code)]
#![allow(unused_variables)]
// Tests that binary operators allow subtyping on both the LHS and RHS,
// and as such do not introduce unnecessarily strict lifetime constraints.
use std::ops::Add;
struct Foo;
impl<'a> Add<&'a Foo> for &'a Foo {
type Output = ();
fn add(self, rhs: &'a Foo) {}
}
fn try_to_add(input: &Foo) {
let local = Foo;
// Manual reborrow worked even with invariant trait search.
&*input + &local;
// Direct use of the reference on the LHS requires additional
// subtyping before searching (invariantly) for `LHS: Add<RHS>`.
input + &local;
}
fn main() {
}