rot, nrot: new functions.

* eval.c (eval_init): nrot, rot intrinsics registered.

* lib.c (nrot, rot): New functions.

* lib.h (nrot, rot): Declared.

* tests/012/seq.tl: New test cases.

* txr.1: Documented.

* stdlib/doc-syms.tl: Updated.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index 25890426..8a39cfc7 100644
--- a/lib.h
+++ b/lib.h
@@ -1183,6 +1183,8 @@ val sort_group(val seq, val keyfun, val lessfun);
 val unique(val seq, val keyfun, struct args *hashv_args);
 val uniq(val seq);
 val grade(val seq, val lessfun, val keyfun_in);
+val nrot(val seq, val n_in);
+val rot(val seq, val n_in);
 val find(val list, val key, val testfun, val keyfun);
 val rfind(val list, val key, val testfun, val keyfun);
 val find_if(val pred, val list, val key);