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-rw-r--r--src/parse_ast.ml1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/parse_ast.ml b/src/parse_ast.ml
index 23957118..b12651c0 100644
--- a/src/parse_ast.ml
+++ b/src/parse_ast.ml
@@ -137,6 +137,7 @@ lit_aux = (* Literal constant *)
| L_num of int (* natural number constant *)
| L_hex of string (* bit vector constant, C-style *)
| L_bin of string (* bit vector constant, C-style *)
+ | L_undef (* undefined value *)
| L_string of string (* string constant *)