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