feat: patch chrono

javascript-engine/external/chrono/src/naive/time/serde.rs

@@ -0,0 +1,65 @@
+#![cfg_attr(docsrs, doc(cfg(feature = "serde")))]
+
+use super::NaiveTime;
+use core::fmt;
+use serde::{de, ser};
+
+// TODO not very optimized for space (binary formats would want something better)
+// TODO round-trip for general leap seconds (not just those with second = 60)
+
+impl ser::Serialize for NaiveTime {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: ser::Serializer,
+    {
+        serializer.collect_str(&self)
+    }
+}
+
+struct NaiveTimeVisitor;
+
+impl<'de> de::Visitor<'de> for NaiveTimeVisitor {
+    type Value = NaiveTime;
+
+    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        formatter.write_str("a formatted time string")
+    }
+
+    fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
+    where
+        E: de::Error,
+    {
+        value.parse().map_err(E::custom)
+    }
+}
+
+impl<'de> de::Deserialize<'de> for NaiveTime {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: de::Deserializer<'de>,
+    {
+        deserializer.deserialize_str(NaiveTimeVisitor)
+    }
+}
+
+#[test]
+fn test_serde_serialize() {
+    super::test_encodable_json(serde_json::to_string);
+}
+
+#[test]
+fn test_serde_deserialize() {
+    super::test_decodable_json(|input| serde_json::from_str(input));
+}
+
+#[test]
+fn test_serde_bincode() {
+    // Bincode is relevant to test separately from JSON because
+    // it is not self-describing.
+    use bincode::{deserialize, serialize};
+
+    let t = NaiveTime::from_hms_nano_opt(3, 5, 7, 98765432).unwrap();
+    let encoded = serialize(&t).unwrap();
+    let decoded: NaiveTime = deserialize(&encoded).unwrap();
+    assert_eq!(t, decoded);
+}