1 files changed, 136 insertions, 0 deletions
diff --git a/third_party/rust/serde_bytes/src/ser.rs b/third_party/rust/serde_bytes/src/ser.rs
new file mode 100644
index 0000000000..1cbed9f757
--- /dev/null
+++ b/third_party/rust/serde_bytes/src/ser.rs
@@ -0,0 +1,136 @@
+use crate::Bytes;
+use serde::Serializer;
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+use crate::ByteBuf;
+
+#[cfg(feature = "alloc")]
+use alloc::borrow::Cow;
+#[cfg(all(feature = "std", not(feature = "alloc")))]
+use std::borrow::Cow;
+
+#[cfg(feature = "alloc")]
+use alloc::boxed::Box;
+
+#[cfg(feature = "alloc")]
+use alloc::vec::Vec;
+
+/// Types that can be serialized via `#[serde(with = "serde_bytes")]`.
+pub trait Serialize {
+    #[allow(missing_docs)]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer;
+}
+
+impl Serialize for [u8] {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self)
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl Serialize for Vec<u8> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self)
+    }
+}
+
+impl Serialize for Bytes {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self)
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl Serialize for ByteBuf {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self)
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl<'a> Serialize for Cow<'a, [u8]> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self)
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl<'a> Serialize for Cow<'a, Bytes> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_bytes(self)
+    }
+}
+
+impl<'a, T> Serialize for &'a T
+where
+    T: ?Sized + Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        (**self).serialize(serializer)
+    }
+}
+
+#[cfg(any(feature = "std", feature = "alloc"))]
+impl<T> Serialize for Box<T>
+where
+    T: ?Sized + Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        (**self).serialize(serializer)
+    }
+}
+
+impl<T> Serialize for Option<T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        struct AsBytes<T>(T);
+
+        impl<T> serde::Serialize for AsBytes<T>
+        where
+            T: Serialize,
+        {
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: Serializer,
+            {
+                self.0.serialize(serializer)
+            }
+        }
+
+        match self {
+            Some(b) => serializer.serialize_some(&AsBytes(b)),
+            None => serializer.serialize_none(),
+        }
+    }
+}