1 files changed, 19 insertions, 0 deletions
diff --git a/assignment-13/Util.dcl b/assignment-13/Util.dcl
new file mode 100644
index 0000000..11ad93e
--- /dev/null
+++ b/assignment-13/Util.dcl
@@ -0,0 +1,19 @@
+definition module Util
+
+:: PrState =
+	{ indent :: Int
+	, output :: [String]
+	}
+
+class print a :: a -> PrState -> PrState
+
+printToString :: a -> String | print a
+
+instance print String
+instance print Int
+
+nl :: PrState -> PrState
+indent :: PrState -> PrState
+unindent :: PrState -> PrState
+
+prsperse :: a [b] -> PrState -> PrState | print a & print b