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-rw-r--r--src/source.sml3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/source.sml b/src/source.sml
index 9ea1ea20..2246399b 100644
--- a/src/source.sml
+++ b/src/source.sml
@@ -51,12 +51,13 @@ datatype con' =
| CVar of string list * string
| CApp of con * con
- | CAbs of string * kind * con
+ | CAbs of string * kind option * con
| CName of string
| CRecord of (con * con) list
| CConcat of con * con
+ | CFold
| CWild of kind