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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/rust/http-body/src/empty.rs | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/http-body/src/empty.rs')
-rw-r--r-- | third_party/rust/http-body/src/empty.rs | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/third_party/rust/http-body/src/empty.rs b/third_party/rust/http-body/src/empty.rs new file mode 100644 index 0000000000..7d63ceb054 --- /dev/null +++ b/third_party/rust/http-body/src/empty.rs @@ -0,0 +1,75 @@ +use super::{Body, SizeHint}; +use bytes::Buf; +use http::HeaderMap; +use std::{ + convert::Infallible, + fmt, + marker::PhantomData, + pin::Pin, + task::{Context, Poll}, +}; + +/// A body that is always empty. +pub struct Empty<D> { + _marker: PhantomData<fn() -> D>, +} + +impl<D> Empty<D> { + /// Create a new `Empty`. + pub fn new() -> Self { + Self::default() + } +} + +impl<D: Buf> Body for Empty<D> { + type Data = D; + type Error = Infallible; + + #[inline] + fn poll_data( + self: Pin<&mut Self>, + _cx: &mut Context<'_>, + ) -> Poll<Option<Result<Self::Data, Self::Error>>> { + Poll::Ready(None) + } + + #[inline] + fn poll_trailers( + self: Pin<&mut Self>, + _cx: &mut Context<'_>, + ) -> Poll<Result<Option<HeaderMap>, Self::Error>> { + Poll::Ready(Ok(None)) + } + + fn is_end_stream(&self) -> bool { + true + } + + fn size_hint(&self) -> SizeHint { + SizeHint::with_exact(0) + } +} + +impl<D> fmt::Debug for Empty<D> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Empty").finish() + } +} + +impl<D> Default for Empty<D> { + fn default() -> Self { + Self { + _marker: PhantomData, + } + } +} + +impl<D> Clone for Empty<D> { + fn clone(&self) -> Self { + Self { + _marker: PhantomData, + } + } +} + +impl<D> Copy for Empty<D> {} |