Cleaning up compiler warnings.

src/parser/list.rs

@@ -64,16 +64,19 @@ impl<T> List<T> {
         }
     }
 
+    #[allow(dead_code)]
     pub fn without_front(&self) -> List<T> {
         List {
             head: self.head.as_ref().map(|node| node.parent.clone()).flatten(),
         }
     }
 
+    #[allow(dead_code)]
     pub fn get_data(&self) -> Option<&T> {
         self.head.as_ref().map(|rc_node| &rc_node.data)
     }
 
+    #[allow(dead_code)]
     pub fn is_empty(&self) -> bool {
         self.head.is_none()
     }
@@ -92,6 +95,7 @@ impl<T> List<T> {
         }
     }
 
+    #[allow(dead_code)]
     pub fn iter_until<'a>(&'a self, other: &'a List<T>) -> impl Iterator<Item = &Rc<Node<T>>> {
         NodeIterUntil {
             position: &self.head,
@@ -99,6 +103,7 @@ impl<T> List<T> {
         }
     }
 
+    #[allow(dead_code)]
     pub fn into_iter_until<'a>(self, other: &'a List<T>) -> impl Iterator<Item = T> + 'a {
         NodeIntoIterUntil {
             position: self,