Add (empty) meta implementation to PersistentList

Author: Tko1

src/persistent_list.rs

@@ -4,6 +4,8 @@ use std::iter::FromIterator;
 use std::rc::Rc;
 
 use crate::value::{ToValue, Value};
+use crate::persistent_list_map::PersistentListMap;
+use crate::traits;
 use std::hash::Hash;
 
 #[derive(Debug, Clone, PartialEq, Hash)]
@@ -66,6 +68,18 @@ impl ToPersistentList for Vec<Rc<Value>> {
         self.into_iter().collect::<PersistentList>()
     }
 }
+impl traits::IMeta for PersistentList {
+    fn meta(&self) -> PersistentListMap {
+        // @TODO implement
+        PersistentListMap::Empty
+    }
+}
+impl traits::IObj for PersistentList {
+    fn with_meta(&self,meta: PersistentListMap) -> PersistentList {
+        // @TODO implement
+        self.clone()
+    }
+}
 impl fmt::Display for PersistentList {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let str = match self {