diff --git a/assets/parser.d.erb b/assets/parser.d.erb
index aad0e3e..40154eb 100644
--- a/assets/parser.d.erb
+++ b/assets/parser.d.erb
@@ -63,6 +63,13 @@ class <%= classname %>
 
     private static string lex_token(const(ubyte)[] * input)
     {
+        uint code_point_length;
+        uint code_point = decode_code_point(input, &code_point_length);
         return null;
     }
+
+    private static uint decode_code_point(const(ubyte)[] * input, uint * code_point_length)
+    {
+        return 0u;
+    }
 }