1 files changed, 6 insertions, 0 deletions
diff --git a/app/IR.hs b/app/IR.hs
index 631cd16..f17547d 100644
--- a/app/IR.hs
+++ b/app/IR.hs
@@ -6,6 +6,7 @@ import qualified Data.Map as M
 data PrlgStr
   = CallS String [PrlgStr]
   | LiteralS String
+  | ListS [PrlgStr] (Maybe PrlgStr)
   deriving (Show)
 
 data Id =
@@ -18,6 +19,7 @@ data Id =
 data PrlgInt
   = CallI Id [PrlgInt] --TODO this should be Int
   | LiteralI Int
+  | ListI [PrlgInt] (Maybe PrlgInt) -- only exists before desugaring
   | VarI Int Int -- VarI localIndex strTableString
   | VoidI
   deriving (Show)
@@ -40,3 +42,7 @@ internPrlg = go
     go t (CallS str ps) =
       let (t', i) = strtablize t str
        in CallI (Id i $ length ps) <$> mapAccumL go t' ps
+    go t (ListS elems Nothing) = flip ListI Nothing <$> mapAccumL go t elems
+    go t (ListS elems (Just tail)) =
+      let (t', tail') = go t tail
+       in flip ListI (Just tail') <$> mapAccumL go t' elems