added support for `cons`, `car`, `cdr`

1 files changed, 3 insertions, 0 deletions

diff --git a/builtin.h b/builtin.h
index 92b2fe0..8d2a6a0 100644
--- a/builtin.h
+++ b/builtin.h
@@ -133,5 +133,8 @@ EvalObj *builtin_lt(ArgList *);
 EvalObj *builtin_gt(ArgList *);
 EvalObj *builtin_arithmetic_eq(ArgList *);
 EvalObj *builtin_display(ArgList *);
+EvalObj *builtin_cons(ArgList *);
+EvalObj *builtin_car(ArgList *);
+EvalObj *builtin_cdr(ArgList *);
 
 #endif