rust/tests/coverage/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

38 lines
981 B
Rust

#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
#![allow(unused_assignments)]
use std::ops::{Coroutine, CoroutineState};
use std::pin::Pin;
fn main() {
let mut coroutine = #[coroutine] || {
yield 1;
return "foo";
};
match Pin::new(&mut coroutine).resume(()) {
CoroutineState::Yielded(1) => {}
_ => panic!("unexpected value from resume"),
}
match Pin::new(&mut coroutine).resume(()) {
CoroutineState::Complete("foo") => {}
_ => panic!("unexpected value from resume"),
}
let mut coroutine = #[coroutine] || {
yield 1;
yield 2;
yield 3;
return "foo";
};
match Pin::new(&mut coroutine).resume(()) {
CoroutineState::Yielded(1) => {}
_ => panic!("unexpected value from resume"),
}
match Pin::new(&mut coroutine).resume(()) {
CoroutineState::Yielded(2) => {}
_ => panic!("unexpected value from resume"),
}
}