diff --git a/src/protocol/ast.rs b/src/protocol/ast.rs
index 829ec525d7d64a682ab17ae0f0ee5cafbbc07d14..de59ceb8784acf851202f9c4f8aa0cfb0ebfa85c 100644
--- a/src/protocol/ast.rs
+++ b/src/protocol/ast.rs
@@ -1004,6 +1004,16 @@ pub struct LiteralStruct {
     pub(crate) definition: Option<DefinitionId>
 }
 
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct LiteralEnum {
+    // Phase 1: parser
+    pub(crate) identifier: NamespacedIdentifier,
+    pub(crate) poly_args: Vec<ParserTypeId>,
+    // Phase 2: linker
+    pub(crate) definition: Option<DefinitionId>,
+    pub(crate) variant_idx: usize,
+}
+
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub enum Method {
     Get,
@@ -1031,6 +1041,13 @@ impl Field {
             _ => false,
         }
     }
+
+    pub fn as_symbolic(&self) -> &FieldSymbolic {
+        match self {
+            Field::Symbolic(v) => v,
+            _ => unreachable!("attempted to get Field::Symbolic from {:?}", self)
+        }
+    }
 }
 
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]