1 files changed, 3 insertions, 0 deletions
diff --git a/elab.sml b/elab.sml
index 2895894..a99758a 100644
--- a/elab.sml
+++ b/elab.sml
@@ -10,6 +10,9 @@ struct
     | "sub" => Syntax.PSub
     | "mul" => Syntax.PMul
     | "div" => Syntax.PDiv
+    | "read" => Syntax.PRead
+    | "write" => Syntax.PWrite
+    | "writeErr" => Syntax.PWriteErr
     | _ => raise Fail ("invalid op: " ^ s)
 
   fun enumerate (l : 'a list) : (int * 'a) list =