reduce-left: rewrite using seq_iter.

* lib.c (reduce_left): Use sequence iteration instead of list
operations.

* txr.1: Add a note to the documentation.

1 files changed, 12 insertions, 0 deletions

diff --git a/txr.1 b/txr.1
index 80d28239..1a172ca7 100644
--- a/txr.1
+++ b/txr.1
@@ -34308,6 +34308,18 @@ and
 to a single value by the repeated application of
 .metn binary-function .
 
+In the case of
+.codn reduce-left ,
+the
+.meta list
+argument required to be an object which is iterable according to the
+.code iter-begin
+function. The
+.code reduce-right
+function treats the
+.meta list
+argument using list operations.
+
 An effective list of operands is formed by combining
 .meta list
 and