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|
//! Check that overloaded compound assignment operators respect usual borrowck rules and emit
//! reasonable diagnostics.
use std::ops::AddAssign;
#[derive(Clone)]
struct Int(i32);
impl AddAssign for Int {
fn add_assign(&mut self, _: Int) {
unimplemented!()
}
}
fn main() {
let mut x = Int(1); //~ NOTE binding `x` declared here
x
//~^ NOTE borrow of `x` occurs here
+=
x;
//~^ ERROR cannot move out of `x` because it is borrowed
//~| NOTE move out of `x` occurs here
let y = Int(2);
//~^ HELP consider changing this to be mutable
//~| SUGGESTION mut
y //~ ERROR cannot borrow `y` as mutable, as it is not declared as mutable
//~| NOTE cannot borrow as mutable
+=
Int(1);
}
|
