New functions: subq, subql, subqual and subst.

* eval.c (eval_init): Register new intrinsics.

* lib.c, lib.h (subq, subql, subqual, subst): New functions.

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

* stdlib/optimize.tl (subst): Function removed. The new subst
drop-in replaces this one.

* txr.1: Documented.

* stdlib/doc-syms.tl: Updated.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index 8a39cfc7..2d7650ff 100644
--- a/lib.h
+++ b/lib.h
@@ -1204,6 +1204,10 @@ val pos_if(val pred, val list, val key);
 val rpos_if(val pred, val list, val key);
 val pos_max(val seq, val testfun, val keyfun);
 val pos_min(val seq, val testfun, val keyfun);
+val subq(val oldv, val newv, val seq);
+val subql(val oldv, val newv, val seq);
+val subqual(val oldv, val newv, val seq);
+val subst(val oldv, val newv, val seq, val keyfun_in, val testfun_in);
 val mismatch(val left, val right, val testfun, val keyfun);
 val rmismatch(val left, val right, val testfun, val keyfun);
 val starts_with(val little, val big, val testfun, val keyfun);