Add macro `seq-setq`.

* doc/lispref/sequences.texi (seq-setq): Document this macro.

* test/lisp/emacs-lisp/seq-tests.el (test-seq-setq):
Test this macro (bug#50053).

1 files changed, 17 insertions, 0 deletions

diff --git a/doc/lispref/sequences.texi b/doc/lispref/sequences.texi
index 20816ce8ca2..257f5d162ea 100644
--- a/doc/lispref/sequences.texi
+++ b/doc/lispref/sequences.texi
@@ -1128,6 +1128,23 @@ assigned to variables as if by @code{setq} instead of as in a
 @end example
 @end defmac
 
+@defmac seq-setq var-sequence val-sequence
+@cindex sequence destructuring
+  This macro works similarly to @code{seq-let}, except that values are
+assigned to variables as if by @code{setq} instead of as in a
+@code{let} binding.
+
+@example
+@group
+(let ((a nil)
+      (b nil))
+  (seq-setq (_ a _ b) '(1 2 3 4))
+  (list a b))
+@result{} (2 4)
+@end group
+@end example
+@end defmac
+
 @defun seq-random-elt sequence
   This function returns an element of @var{sequence} taken at random.