1 files changed, 25 insertions, 0 deletions
diff --git a/third_party/rust/serde_yaml/src/value/ser.rs b/third_party/rust/serde_yaml/src/value/ser.rs
new file mode 100644
index 0000000000..f2c4bb438c
--- /dev/null
+++ b/third_party/rust/serde_yaml/src/value/ser.rs
@@ -0,0 +1,25 @@
+use crate::Value;
+use serde::Serialize;
+
+impl Serialize for Value {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        match self {
+            Value::Null => serializer.serialize_unit(),
+            Value::Bool(b) => serializer.serialize_bool(*b),
+            Value::Number(n) => n.serialize(serializer),
+            Value::String(s) => serializer.serialize_str(s),
+            Value::Sequence(seq) => seq.serialize(serializer),
+            Value::Mapping(hash) => {
+                use serde::ser::SerializeMap;
+                let mut map = serializer.serialize_map(Some(hash.len()))?;
+                for (k, v) in hash {
+                    map.serialize_entry(k, v)?;
+                }
+                map.end()
+            }
+        }
+    }
+}