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//@ 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() {
}
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