1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/futures-util/src/stream/try_stream/try_for_each.rs b/vendor/futures-util/src/stream/try_stream/try_for_each.rs
new file mode 100644
index 000000000..6a081d84e
--- /dev/null
+++ b/vendor/futures-util/src/stream/try_stream/try_for_each.rs
@@ -0,0 +1,68 @@
+use core::fmt;
+use core::pin::Pin;
+use futures_core::future::{Future, TryFuture};
+use futures_core::ready;
+use futures_core::stream::TryStream;
+use futures_core::task::{Context, Poll};
+use pin_project_lite::pin_project;
+
+pin_project! {
+    /// Future for the [`try_for_each`](super::TryStreamExt::try_for_each) method.
+    #[must_use = "futures do nothing unless you `.await` or poll them"]
+    pub struct TryForEach<St, Fut, F> {
+        #[pin]
+        stream: St,
+        f: F,
+        #[pin]
+        future: Option<Fut>,
+    }
+}
+
+impl<St, Fut, F> fmt::Debug for TryForEach<St, Fut, F>
+where
+    St: fmt::Debug,
+    Fut: fmt::Debug,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("TryForEach")
+            .field("stream", &self.stream)
+            .field("future", &self.future)
+            .finish()
+    }
+}
+
+impl<St, Fut, F> TryForEach<St, Fut, F>
+where
+    St: TryStream,
+    F: FnMut(St::Ok) -> Fut,
+    Fut: TryFuture<Ok = (), Error = St::Error>,
+{
+    pub(super) fn new(stream: St, f: F) -> Self {
+        Self { stream, f, future: None }
+    }
+}
+
+impl<St, Fut, F> Future for TryForEach<St, Fut, F>
+where
+    St: TryStream,
+    F: FnMut(St::Ok) -> Fut,
+    Fut: TryFuture<Ok = (), Error = St::Error>,
+{
+    type Output = Result<(), St::Error>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let mut this = self.project();
+        loop {
+            if let Some(fut) = this.future.as_mut().as_pin_mut() {
+                ready!(fut.try_poll(cx))?;
+                this.future.set(None);
+            } else {
+                match ready!(this.stream.as_mut().try_poll_next(cx)?) {
+                    Some(e) => this.future.set(Some((this.f)(e))),
+                    None => break,
+                }
+            }
+        }
+        Poll::Ready(Ok(()))
+    }
+}