;; Author: Nicolas Petton <nicolas@petton.fr>
;; Keywords: sequences
-;; Version: 1.4
+;; Version: 1.5
;; Package: seq
;; Maintainer: emacs-devel@gnu.org
(defmacro seq-doseq (spec &rest body)
"Loop over a sequence.
-Similar to `dolist' but can be applied lists, strings and vectors.
+Similar to `dolist' but can be applied to lists, strings, and vectors.
Evaluate BODY with VAR bound to each element of SEQ, in turn.
-Then evaluate RESULT to get return value, default nil.
-\(fn (VAR SEQ [RESULT]) BODY...)"
+\(fn (VAR SEQ) BODY...)"
(declare (indent 1) (debug ((symbolp form &optional form) body)))
- (let ((is-list (make-symbol "is-list"))
+ (let ((length (make-symbol "length"))
(seq (make-symbol "seq"))
(index (make-symbol "index")))
`(let* ((,seq ,(cadr spec))
- (,is-list (listp ,seq))
- (,index (if ,is-list ,seq 0)))
- (while (if ,is-list
- (consp ,index)
- (< ,index (seq-length ,seq)))
- (let ((,(car spec) (if ,is-list
- (car ,index)
- (seq-elt ,seq ,index))))
- ,@body
- (setq ,index (if ,is-list
- (cdr ,index)
- (+ ,index 1)))))
- ,@(if (cddr spec)
- `((setq ,(car spec) nil) ,@(cddr spec))))))
+ (,length (if (listp ,seq) nil (seq-length ,seq)))
+ (,index (if ,length 0 ,seq)))
+ (while (if ,length
+ (< ,index ,length)
+ (consp ,index))
+ (let ((,(car spec) (if ,length
+ (prog1 (seq-elt ,seq ,index)
+ (setq ,index (+ ,index 1)))
+ (pop ,index))))
+ ,@body)))))
(defun seq-drop (seq n)
"Return a subsequence of SEQ without its first N elements.
(`vector (apply #'vconcat seqs))
(`string (apply #'concat seqs))
(`list (apply #'append (append seqs '(nil))))
- (t (error "Not a sequence type name: %s" type))))
+ (t (error "Not a sequence type name: %S" type))))
(defun seq-mapcat (function seq &optional type)
"Concatenate the result of applying FUNCTION to each element of SEQ.
(`vector (vconcat seq))
(`string (concat seq))
(`list (append seq nil))
- (t (error "Not a sequence type name: %s" type))))
+ (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.
(defalias 'seq-each #'seq-do)
(defalias 'seq-map #'mapcar)
-(add-to-list 'emacs-lisp-mode-hook #'seq--activate-font-lock-keywords)
+(unless (fboundp 'elisp--font-lock-flush-elisp-buffers)
+ ;; In Emacsā„25, (via elisp--font-lock-flush-elisp-buffers and a few others)
+ ;; we automatically highlight macros.
+ (add-to-list 'emacs-lisp-mode-hook #'seq--activate-font-lock-keywords))
(provide 'seq)
;;; seq.el ends here