Provide butlast function.

* eval.c (eval_init): Registered butlast intrinsic.

* lib.c (butlast): New function.

* lib.h (butlast): Declared.

* txr.1: Documented butlast.

1 files changed, 1 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index fd5a720f..b1bb0d17 100644
--- a/eval.c
+++ b/eval.c
@@ -4471,6 +4471,7 @@ void eval_init(void)
   reg_fun(intern(lit("reverse"), user_package), func_n1(reverse));
   reg_fun(intern(lit("ldiff"), user_package), func_n2(ldiff));
   reg_fun(intern(lit("last"), user_package), func_n1(last));
+  reg_fun(intern(lit("butlast"), user_package), func_n1(butlast));
   reg_fun(intern(lit("nthcdr"), user_package), func_n2(nthcdr));
   reg_fun(intern(lit("flatten"), user_package), func_n1(flatten));
   reg_fun(intern(lit("flatten*"), user_package), func_n1(lazy_flatten));