Introduce notion of RuntimeValue

schala-lang/language/src/tree_walk_eval/mod.rs

@@ -127,6 +127,24 @@ impl MemoryValue {
     }
 }
 
+#[derive(Debug)]
+enum RuntimeValue {
+    Expression(Expression),
+    Evaluated(Primitive),
+}
+
+impl From<Expression> for RuntimeValue {
+    fn from(expr: Expression) -> Self {
+        Self::Expression(expr)
+    }
+}
+
+impl From<Primitive> for RuntimeValue {
+    fn from(prim: Primitive) -> Self {
+        Self::Evaluated(prim)
+    }
+}
+
 /// A fully-reduced value
 #[derive(Debug, Clone)]
 enum Primitive {