New rpermi: iterator version of rperm

* combi.c (rpermi_get, rpermi_peek, rpermi_clone): New static
functions.
(rpermi_ops): New static structure.
(rpermi): New function.

* combi.h (rpermi): Declared.

* eval.c (eval_init): Register rpermi intrinsic.

1 files changed, 1 insertions, 0 deletions

diff --git a/combi.h b/combi.h
index 907aec87..17465cc1 100644
--- a/combi.h
+++ b/combi.h
@@ -29,5 +29,6 @@
 val perm(val seq, val k);
 val permi(val seq, val k);
 val rperm(val seq, val k);
+val rpermi(val seq, val k);
 val comb(val seq, val k);
 val rcomb(val seq, val k);