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This commit is contained in:
Yuki Okushi 2019-10-22 09:00:01 +09:00
parent cde60e82a0
commit 4fcc784c9a
1 changed files with 16 additions and 9 deletions
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25
src/librustc/error_codes.rs
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@ -2135,13 +2135,13 @@ Erroneous code examples:
# use std::pin::Pin;
# use std::future::Future;
# use std::task::{Context, Poll};
#
# struct WakeOnceThenComplete(bool);
#
# fn wake_and_yield_once() -> WakeOnceThenComplete {
# WakeOnceThenComplete(false)
# }
#
# impl Future for WakeOnceThenComplete {
# type Output = ();
# fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()> {
@ -2154,7 +2154,7 @@ Erroneous code examples:
# }
# }
# }
#
fn foo() {
wake_and_yield_once().await // `await` is used outside `async` context
}
@ -2168,13 +2168,13 @@ an async context, like an `async fn` or an `async` block.
# use std::pin::Pin;
# use std::future::Future;
# use std::task::{Context, Poll};
#
# struct WakeOnceThenComplete(bool);
#
# fn wake_and_yield_once() -> WakeOnceThenComplete {
# WakeOnceThenComplete(false)
# }
#
# impl Future for WakeOnceThenComplete {
# type Output = ();
# fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()> {
@ -2187,9 +2187,16 @@ an async context, like an `async fn` or an `async` block.
# }
# }
# }
#
async fn foo() {
wake_and_yield_once().await // `await` is used within `async` context
wake_and_yield_once().await // `await` is used within `async` function
}
fn bar(x: u8) -> impl Future<Output = u8> {
async move {
wake_and_yield_once().await; // `await` is used within `async` block
x
}
}
```
"##,