44 lines
930 B
Rust
44 lines
930 B
Rust
//@ run-pass
|
|
|
|
#![feature(coroutines, coroutine_trait)]
|
|
|
|
use std::ops::{Coroutine, CoroutineState};
|
|
use std::pin::Pin;
|
|
|
|
struct W<T>(T);
|
|
|
|
// This impl isn't safe in general, but the coroutine used in this test is movable
|
|
// so it won't cause problems.
|
|
impl<T: Coroutine<(), Return = ()> + Unpin> Iterator for W<T> {
|
|
type Item = T::Yield;
|
|
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
match Pin::new(&mut self.0).resume(()) {
|
|
CoroutineState::Complete(..) => None,
|
|
CoroutineState::Yielded(v) => Some(v),
|
|
}
|
|
}
|
|
}
|
|
|
|
fn test() -> impl Coroutine<(), Return = (), Yield = u8> + Unpin {
|
|
|| {
|
|
for i in 1..6 {
|
|
yield i
|
|
}
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let end = 11;
|
|
|
|
let closure_test = |start| {
|
|
move || {
|
|
for i in start..end {
|
|
yield i
|
|
}
|
|
}
|
|
};
|
|
|
|
assert!(W(test()).chain(W(closure_test(6))).eq(1..11));
|
|
}
|