1 files changed, 52 insertions, 0 deletions
diff --git a/vendor/futures-util/src/stream/try_stream/try_collect.rs b/vendor/futures-util/src/stream/try_stream/try_collect.rs
new file mode 100644
index 000000000..5d3b3d766
--- /dev/null
+++ b/vendor/futures-util/src/stream/try_stream/try_collect.rs
@@ -0,0 +1,52 @@
+use core::mem;
+use core::pin::Pin;
+use futures_core::future::{FusedFuture, Future};
+use futures_core::ready;
+use futures_core::stream::{FusedStream, TryStream};
+use futures_core::task::{Context, Poll};
+use pin_project_lite::pin_project;
+
+pin_project! {
+    /// Future for the [`try_collect`](super::TryStreamExt::try_collect) method.
+    #[derive(Debug)]
+    #[must_use = "futures do nothing unless you `.await` or poll them"]
+    pub struct TryCollect<St, C> {
+        #[pin]
+        stream: St,
+        items: C,
+    }
+}
+
+impl<St: TryStream, C: Default> TryCollect<St, C> {
+    pub(super) fn new(s: St) -> Self {
+        Self { stream: s, items: Default::default() }
+    }
+}
+
+impl<St, C> FusedFuture for TryCollect<St, C>
+where
+    St: TryStream + FusedStream,
+    C: Default + Extend<St::Ok>,
+{
+    fn is_terminated(&self) -> bool {
+        self.stream.is_terminated()
+    }
+}
+
+impl<St, C> Future for TryCollect<St, C>
+where
+    St: TryStream,
+    C: Default + Extend<St::Ok>,
+{
+    type Output = Result<C, St::Error>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let mut this = self.project();
+        Poll::Ready(Ok(loop {
+            match ready!(this.stream.as_mut().try_poll_next(cx)?) {
+                Some(x) => this.items.extend(Some(x)),
+                None => break mem::replace(this.items, Default::default()),
+            }
+        }))
+    }
+}