1 files changed, 4 insertions, 0 deletions
diff --git a/ast.hs b/ast.hs
index f566335..8cecab6 100644
--- a/ast.hs
+++ b/ast.hs
@@ -20,6 +20,8 @@ data Declaration
                   ,valueOf :: Maybe Expression}
     | DecTypedef {typeOf :: Type
                  ,nameOf :: Name}
+    | DecExtern {typeOf :: Type
+                ,nameOf :: Name}
   deriving (Show)
 
 data Block = Block [Statement]
@@ -102,6 +104,8 @@ instance PShow Declaration where
         concat [pshow t, " ", n, " = ", pshow e, ";"]
     pshow (DecTypedef t n) =
         concat ["type ", n, " = ", pshow t, ";"]
+    pshow (DecExtern t n) =
+        concat ["extern ", pshow t, " ", n, ";"]
 
 instance PShow Block where
     pshow (Block []) = "{}"