Add 'from json'

crates/nu-protocol/src/value/stream.rs

@@ -1,6 +1,8 @@
 use crate::*;
 use std::{cell::RefCell, fmt::Debug, rc::Rc};
 
+use serde::{Deserialize, Serialize};
+
 #[derive(Clone)]
 pub struct ValueStream(pub Rc<RefCell<dyn Iterator<Item = Value>>>);
 
@@ -35,6 +37,24 @@ impl Iterator for ValueStream {
     }
 }
 
+impl Serialize for ValueStream {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        todo!()
+    }
+}
+
+impl<'de> Deserialize<'de> for ValueStream {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        todo!()
+    }
+}
+
 pub trait IntoValueStream {
     fn into_value_stream(self) -> ValueStream;
 }