[elpa] externals/seq 1580064 04/53: Update seq.el to version 1.2

[Stefan Monnier]

branch: externals/seq
commit 158006459c6c36b095836c7f24bea83f89e98729
Author: Nicolas Petton <nicolas@petton.fr>
Commit: Nicolas Petton <nicolas@petton.fr>

    Update seq.el to version 1.2
    
    * package/seq/seq.el: Update to version 1.2
    * packages/seq/tests/seq-tests.el: Update to version 1.2
---
 seq.el             | 28 +++++++++++++++++++++++-----
 tests/seq-tests.el | 11 +++++++++--
 2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/seq.el b/seq.el
index bc0344d..5366fd2 100644
--- a/seq.el
+++ b/seq.el
@@ -4,7 +4,7 @@
 
 ;; Author: Nicolas Petton <nicolas@petton.fr>
 ;; Keywords: sequences
-;; Version: 1.1.1
+;; Version: 1.2
 ;; Package: seq
 
 ;; Maintainer: emacs-devel@gnu.org
@@ -172,9 +172,7 @@ The result is a sequence of the same type as SEQ."
   (if (listp seq)
       (sort (seq-copy seq) pred)
     (let ((result (seq-sort pred (append seq nil))))
-      (cond ((stringp seq) (concat result))
-            ((vectorp seq) (vconcat result))
-            (t (error "Unsupported sequence: %s" seq))))))
+      (seq--into result (type-of seq)))))
 
 (defun seq-contains-p (seq elt &optional testfn)
   "Return the first element in SEQ that equals to ELT.
@@ -257,6 +255,27 @@ keys.  Keys are compared using `equal'."
    (seq-reverse seq)
    nil))
 
+(defalias 'seq-reverse
+  (if (ignore-errors (reverse [1 2]))
+      #'reverse
+    (lambda (seq)
+      "Return the reversed copy of list, vector, or string SEQ.
+See also the function `nreverse', which is used more often."
+      (let ((result '()))
+        (seq-map (lambda (elt) (push elt result))
+                 seq)
+        (if (listp seq)
+            result
+          (seq--into result (type-of seq)))))))
+
+(defun seq--into (seq type)
+  "Convert the sequence SEQ into a sequence of type TYPE."
+  (pcase type
+    (`vector (vconcat seq))
+    (`string (concat seq))
+    (`list (append seq nil))
+    (t (error "Not a sequence type name: %s" type))))
+
 (defun seq--drop-list (list n)
   "Return a list from LIST without its first N elements.
 This is an optimization for lists in `seq-drop'."
@@ -300,7 +319,6 @@ This is an optimization for lists in `seq-take-while'."
 
 (defalias 'seq-copy #'copy-sequence)
 (defalias 'seq-elt #'elt)
-(defalias 'seq-reverse #'reverse)
 (defalias 'seq-length #'length)
 (defalias 'seq-do #'mapc)
 (defalias 'seq-each #'seq-do)
diff --git a/tests/seq-tests.el b/tests/seq-tests.el
index b92a15c..badb326 100644
--- a/tests/seq-tests.el
+++ b/tests/seq-tests.el
@@ -216,10 +216,17 @@ Evaluate BODY for each created sequence.
   (should (equal (seq-partition '(1 2 3) -1) '())))
 
 (ert-deftest test-seq-group-by ()
-  (should (equal (seq-group-by #'test-sequences-oddp '(1 2 3 4))
-                 '((t 1 3) (nil 2 4))))
+  (with-test-sequences (seq '(1 2 3 4))
+   (should (equal (seq-group-by #'test-sequences-oddp seq)
+                  '((t 1 3) (nil 2 4)))))
   (should (equal (seq-group-by #'car '((a 1) (b 3) (c 4) (a 2)))
                  '((b (b 3)) (c (c 4)) (a (a 1) (a 2))))))
 
+(ert-deftest test-seq-reverse ()
+  (with-test-sequences (seq '(1 2 3 4))
+    (should (same-contents-p (seq-reverse seq) '(4 3 2 1)))
+    (should (equal (type-of (seq-reverse seq))
+                   (type-of seq)))))
+
 (provide 'seq-tests)
 ;;; seq-tests.el ends here