New functions: nested-vec-of and nested-vec.

* eval.c (eval_init): Register nestd-vec-of and nested-vec
intrinsics.

* lib.[ch] (vec_allocate, vec_own, vec_init): New static functions.
(vector, copy_vec): Expressed in terms of new functions.
(nested_vec_of_v, nested_vec_v): New functions.

* args.[ch] (args_cat_from): New function.

* tests/010/vec.tl: New tests.

* txr.1: Documented.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index 4c101501..e3cc0f8b 100644
--- a/lib.h
+++ b/lib.h
@@ -1262,6 +1262,8 @@ val replace_vec(val vec_in, val items, val from, val to);
 val replace_obj(val obj, val items, val from, val to);
 val fill_vec(val vec, val item, val from_in, val to_in);
 val cat_vec(val list);
+val nested_vec_of_v(val initval, struct args *);
+val nested_vec_v(struct args *);
 val lazy_stream_cons(val stream, val no_throw_close);
 val lazy_str(val list, val term, val limit);
 val lazy_str_force_upto(val lstr, val index);