mirror of https://github.com/rust-lang/rust
37 lines
772 B
Rust
37 lines
772 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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fn foo(_: &str) -> String {
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String::new()
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}
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fn bar(baz: String) -> impl Coroutine<(), Yield = String, Return = ()> {
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#[coroutine] move || {
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yield foo(&baz);
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}
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}
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fn foo2(_: &str) -> Result<String, ()> {
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Err(())
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}
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fn bar2(baz: String) -> impl Coroutine<(), Yield = String, Return = ()> {
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#[coroutine] move || {
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if let Ok(quux) = foo2(&baz) {
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yield quux;
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}
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}
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}
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fn main() {
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assert_eq!(
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Pin::new(&mut bar(String::new())).resume(()),
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CoroutineState::Yielded(String::new())
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);
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assert_eq!(Pin::new(&mut bar2(String::new())).resume(()), CoroutineState::Complete(()));
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}
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