rust/tests/ui/coroutine/drop-track-addassign-yield.rs
Oli Scherer aef0f4024a Error on using yield without also using #[coroutine] on the closure
And suggest adding the `#[coroutine]` to the closure
2024-04-24 08:05:29 +00:00

41 lines
865 B
Rust

//@ run-pass
// Based on addassign-yield.rs, but with drop tracking enabled. Originally we did not implement
// the fake_read callback on ExprUseVisitor which caused this case to break.
#![feature(coroutines, stmt_expr_attributes)]
fn foo() {
let _y = #[coroutine] static || {
let x = &mut 0;
*{
yield;
x
} += match String::new() {
_ => 0,
};
};
// Please don't ever actually write something like this
let _z = #[coroutine] static || {
let x = &mut 0;
*{
let inner = &mut 1;
*{
yield ();
inner
} += match String::new() {
_ => 1,
};
yield;
x
} += match String::new() {
_ => 2,
};
};
}
fn main() {
foo()
}