1 files changed, 61 insertions, 0 deletions
diff --git a/third_party/rust/sync-guid/src/serde_support.rs b/third_party/rust/sync-guid/src/serde_support.rs
new file mode 100644
index 0000000000..50220ffe12
--- /dev/null
+++ b/third_party/rust/sync-guid/src/serde_support.rs
@@ -0,0 +1,61 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#![cfg(feature = "serde_support")]
+
+use std::fmt;
+
+use serde::{
+    de::{self, Deserialize, Deserializer, Visitor},
+    ser::{Serialize, Serializer},
+};
+
+use crate::Guid;
+
+struct GuidVisitor;
+impl<'de> Visitor<'de> for GuidVisitor {
+    type Value = Guid;
+    #[inline]
+    fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter.write_str("a sync guid")
+    }
+    #[inline]
+    fn visit_str<E: de::Error>(self, s: &str) -> Result<Self::Value, E> {
+        Ok(Guid::from_slice(s.as_ref()))
+    }
+}
+
+impl<'de> Deserialize<'de> for Guid {
+    #[inline]
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        deserializer.deserialize_str(GuidVisitor)
+    }
+}
+
+impl Serialize for Guid {
+    #[inline]
+    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
+        serializer.serialize_str(self.as_str())
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use serde_test::{assert_tokens, Token};
+    #[test]
+    fn test_ser_de() {
+        let guid = Guid::from("asdffdsa12344321");
+        assert_tokens(&guid, &[Token::Str("asdffdsa12344321")]);
+
+        let guid = Guid::from("");
+        assert_tokens(&guid, &[Token::Str("")]);
+
+        let guid = Guid::from(&b"abcd43211234"[..]);
+        assert_tokens(&guid, &[Token::Str("abcd43211234")]);
+    }
+}