=== modified file 'lisp/ChangeLog'
--- lisp/ChangeLog 2014-11-07 10:49:22 +0000
+++ lisp/ChangeLog 2014-11-12 22:50:37 +0000
@@ -1,3 +1,7 @@
+2014-11-12 Nicolas Petton
+
+ * emacs-lisp/seq.el: New file.
+
2014-11-07 Martin Rudalics
* cus-start.el (frame-resize-pixelwise): Fix group.
=== added file 'lisp/emacs-lisp/seq.el'
--- lisp/emacs-lisp/seq.el 1970-01-01 00:00:00 +0000
+++ lisp/emacs-lisp/seq.el 2014-11-12 22:51:45 +0000
@@ -0,0 +1,212 @@
+;;; seq.el --- Sequence manipulation functions -*- lexical-binding: t -*-
+
+;; Copyright (C) 2014 Free Software Foundation, Inc.
+
+;; Author: Nicolas Petton
+;; Keywords: sequences
+
+;; Maintainer: address@hidden
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs. If not, see .
+
+;;; Commentary:
+
+;; Sequence-manipulation functions that complement basic functions
+;; provided by subr.el.
+;;
+;; All functions are prefixed with "seq-".
+;;
+;; All provided functions work on lists, strings and vectors.
+;;
+;; Functions taking a predicate or a function iterating over the
+;; sequence as argument take the function as their first argument and
+;; the sequence as their second argument. All other functions take
+;; the sequence as their first argument.
+;;
+;; All functions are tested in test/automated/seq-tests.el
+
+;;; Code:
+
+(defun seq-drop (seq n)
+ "Return a subsequence of SEQ without its first N elements.
+The result is a sequence of the same type as SEQ."
+ (let ((length (seq-length seq)))
+ (seq-subseq seq (min n length) length)))
+
+(defun seq-take (seq n)
+ "Return a subsequence of SEQ with its first N elements.
+The result is a sequence of the same type as SEQ."
+ (seq-subseq seq 0 (min n (seq-length seq))))
+
+(defun seq-drop-while (pred seq)
+ "Return a subsequence, from the first element for which (PRED element) is nil, of SEQ.
+The result is a sequence of the same type as SEQ."
+ (let ((n 0))
+ (while (and (< n (seq-length seq))
+ (funcall pred (seq-elt seq n)))
+ (setq n (+ 1 n)))
+ (seq-drop seq n)))
+
+(defun seq-take-while (pred seq)
+ "Return a subsequence of the successive elements for which (PRED element) is non-nil in SEQ.
+The result is a sequence of the same type as SEQ."
+ (let ((n 0))
+ (while (and (< n (seq-length seq))
+ (funcall pred (seq-elt seq n)))
+ (setq n (+ 1 n)))
+ (seq-take seq n)))
+
+(defun seq-filter (pred seq)
+ "Return a list of all the elements for which (PRED element) is non-nil in SEQ."
+ (delq 'seq--exclude (seq-map (lambda (elt)
+ (if (funcall pred elt)
+ elt
+ 'seq--exclude))
+ seq)))
+
+(defun seq-remove (pred seq)
+ "Return a list of all the elements for which (PRED element) is nil in SEQ."
+ (seq-filter (lambda (elt) (not (funcall pred elt)))
+ seq))
+
+(defun seq-reduce (function seq initial-value)
+ "Reduce the two-arguments function FUNCTION across SEQ, starting with INITIAL-VALUE.
+
+Return the result of applying FUNCTION to INITIAL-VALUE and the
+first element of SEQ, then applying FUNCTION to that result and
+the second element of SEQ, then to that result and the third
+element of SEQ, etc.
+
+If SEQ is empty, return INITIAL-VALUE and FUNCTION is not called."
+ (if (seq-empty-p seq)
+ initial-value
+ (let ((acc initial-value))
+ (seq-doseq (elt seq)
+ (setq acc (funcall function acc elt)))
+ acc)))
+
+(defun seq-some-p (pred seq)
+ "Return any element for which (PRED element) is non-nil in SEQ, nil otherwise."
+ (catch 'seq--break
+ (seq-doseq (elt seq)
+ (when (funcall pred elt)
+ (throw 'seq--break elt)))
+ nil))
+
+(defun seq-every-p (pred seq)
+ "Return non-nil if (PRED element) is non-nil for all elements of the sequence SEQ."
+ (catch 'seq--break
+ (seq-doseq (elt seq)
+ (or (funcall pred elt)
+ (throw 'seq--break nil)))
+ t))
+
+(defun seq-count (pred seq)
+ "Return the number of elements for which (PRED element) in non-nil in seq."
+ (let ((count 0))
+ (seq-doseq (elt seq)
+ (when (funcall pred elt)
+ (setq count (+ 1 count))))
+ count))
+
+(defun seq-empty-p (seq)
+ "Return non-nil if the sequence SEQ is empty, nil otherwise."
+ (= 0 (seq-length seq)))
+
+(defun seq-sort (pred seq)
+ "Return a sorted sequence comparing using PRED the elements of SEQ.
+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))))))
+
+(defun seq-contains-p (seq elt &optional testfn)
+ "Return the first element in SEQ that equals to ELT.
+Equality is defined by TESTFN if non-nil or by `equal' if nil."
+ (seq-some-p (lambda (e)
+ (funcall (or testfn #'equal) elt e))
+ seq))
+
+(defun seq-uniq (seq &optional testfn)
+ "Return a list of the elements of SEQ with duplicates removed.
+Use TESTFN to compare elements, or `equal' if TESTFN is nil."
+ (let ((result '()))
+ (seq-doseq (elt seq)
+ (unless (seq-contains-p result elt testfn)
+ (setq result (cons elt result))))
+ (nreverse result)))
+
+(defun seq-subseq (seq start &optional end)
+ "Return the subsequence of SEQ from START to END.
+If END is omitted, it defaults to the length of the sequence.
+If START or END is negative, it counts from the end."
+ (cond ((or (stringp seq) (vectorp seq)) (substring seq start end))
+ ((listp seq)
+ (let (len)
+ (and end (< end 0) (setq end (+ end (setq len (seq-length seq)))))
+ (if (< start 0) (setq start (+ start (or len (setq len (seq-length seq))))))
+ (if (> start 0) (setq seq (nthcdr start seq)))
+ (if end
+ (let ((res nil))
+ (while (>= (setq end (1- end)) start)
+ (push (pop seq) res))
+ (nreverse res))
+ (seq-copy seq))))
+ (t (error "Unsupported sequence: %s" seq))))
+
+(defun seq-concatenate (type &rest seqs)
+ "Concatenate, into a sequence of type TYPE, the sequences SEQS.
+TYPE must be one of following symbols: vector, string or list.
+
+\n(fn TYPE SEQUENCE...)"
+ (pcase type
+ (`vector (apply #'vconcat seqs))
+ (`string (apply #'concat seqs))
+ (`list (apply #'append (append seqs '(nil))))
+ (t (error "Not a sequence type name: %s" type))))
+
+(defmacro seq-doseq (spec &rest body)
+ "Loop over a sequence.
+Similar to `dolist' but can be applied 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...)"
+ (declare (indent 1) (debug ((symbolp form &optional form) body)))
+ (let ((index (make-symbol "index"))
+ (seq (make-symbol "seq")))
+ `(let ((,index 0)
+ (,seq ,(cadr spec)))
+ (while (< ,index (seq-length ,seq))
+ (let ((,(car spec) (seq-elt ,seq ,index)))
+ ,@body
+ (setq ,index (+ ,index 1))))
+ ,@(if (cddr spec)
+ `((setq ,(car spec) nil) ,@(cddr spec))))))
+
+(defalias 'seq-copy #'copy-sequence)
+(defalias 'seq-elt #'elt)
+(defalias 'seq-length #'length)
+(defalias 'seq-do #'mapc)
+(defalias 'seq-each #'seq-do)
+(defalias 'seq-map #'mapcar)
+
+(provide 'seq)
+;;; seq.el ends here
=== modified file 'test/ChangeLog'
--- test/ChangeLog 2014-10-28 20:33:12 +0000
+++ test/ChangeLog 2014-11-12 22:50:48 +0000
@@ -1,3 +1,7 @@
+2014-11-12 Nicolas Petton
+
+ * automated/seq-tests.el: New file.
+
2014-10-28 Ulf Jasper
* automated/libxml-tests.el: New file.
=== added file 'test/automated/seq-tests.el'
--- test/automated/seq-tests.el 1970-01-01 00:00:00 +0000
+++ test/automated/seq-tests.el 2014-11-12 22:18:45 +0000
@@ -0,0 +1,177 @@
+;;; seq-tests.el --- Tests for sequences.el
+
+;; Copyright (C) 2014 Free Software Foundation, Inc.
+
+;; Author: Nicolas Petton
+;; Maintainer: address@hidden
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs. If not, see .
+
+;;; Commentary:
+
+;; Tests for sequences.el
+
+;;; Code:
+
+(require 'ert)
+(require 'seq)
+
+(defmacro with-test-sequences (spec &rest body)
+ "Successively bind VAR to a list, vector, and string built from SEQ.
+Evaluate BODY for each created sequence.
+
+\(fn (var seq) body)"
+ (declare (indent 1) (debug ((symbolp form) body)))
+ (let ((initial-seq (make-symbol "initial-seq")))
+ `(let ((,initial-seq ,(cadr spec)))
+ ,@(mapcar (lambda (s)
+ `(let ((,(car spec) (apply (function ,s) ,initial-seq)))
+ ,@body))
+ '(list vector string)))))
+
+(defun same-contents-p (seq1 seq2)
+ "Return t if SEQ1 and SEQ2 have the same contents, nil otherwise."
+ (equal (append seq1 '()) (append seq2 '())))
+
+(defun test-sequences-evenp (integer)
+ "Return t if INTEGER is even."
+ (eq (logand integer 1) 0))
+
+(defun test-sequences-oddp (integer)
+ "Return t if INTEGER is odd."
+ (not (test-sequences-evenp integer)))
+
+(ert-deftest test-seq-drop ()
+ (with-test-sequences (seq '(1 2 3 4))
+ (should (equal (seq-drop seq 0) seq))
+ (should (equal (seq-drop seq 1) (seq-subseq seq 1)))
+ (should (equal (seq-drop seq 2) (seq-subseq seq 2)))
+ (should (seq-empty-p (seq-drop seq 4)))
+ (should (seq-empty-p (seq-drop seq 10))))
+ (with-test-sequences (seq '())
+ (should (seq-empty-p (seq-drop seq 0)))
+ (should (seq-empty-p (seq-drop seq 1)))))
+
+(ert-deftest test-seq-take ()
+ (with-test-sequences (seq '(2 3 4 5))
+ (should (seq-empty-p (seq-take seq 0)))
+ (should (= (seq-length (seq-take seq 1)) 1))
+ (should (= (seq-elt (seq-take seq 1) 0) 2))
+ (should (same-contents-p (seq-take seq 3) '(2 3 4)))
+ (should (equal (seq-take seq 10) seq))))
+
+(ert-deftest test-seq-filter ()
+ (with-test-sequences (seq '(6 7 8 9 10))
+ (should (equal (seq-filter #'test-sequences-evenp seq) '(6 8 10)))
+ (should (equal (seq-filter #'test-sequences-oddp seq) '(7 9)))
+ (should (equal (seq-filter (lambda (elt) nil) seq) '())))
+ (with-test-sequences (seq '())
+ (should (equal (seq-filter #'test-sequences-evenp seq) '()))))
+
+(ert-deftest test-seq-remove ()
+ (with-test-sequences (seq '(6 7 8 9 10))
+ (should (equal (seq-remove #'test-sequences-evenp seq) '(7 9)))
+ (should (equal (seq-remove #'test-sequences-oddp seq) '(6 8 10)))
+ (should (same-contents-p (seq-remove (lambda (elt) nil) seq) seq)))
+ (with-test-sequences (seq '())
+ (should (equal (seq-remove #'test-sequences-evenp seq) '()))))
+
+(ert-deftest test-seq-count ()
+ (with-test-sequences (seq '(6 7 8 9 10))
+ (should (equal (seq-count #'test-sequences-evenp seq) 3))
+ (should (equal (seq-count #'test-sequences-oddp seq) 2))
+ (should (equal (seq-count (lambda (elt) nil) seq) 0)))
+ (with-test-sequences (seq '())
+ (should (equal (seq-count #'test-sequences-evenp seq) 0))))
+
+(ert-deftest test-seq-reduce ()
+ (with-test-sequences (seq '(1 2 3 4))
+ (should (= (seq-reduce #'+ seq 0) 10))
+ (should (= (seq-reduce #'+ seq 5) 15)))
+ (with-test-sequences (seq '())
+ (should (eq (seq-reduce #'+ seq 0) 0))
+ (should (eq (seq-reduce #'+ seq 7) 7))))
+
+(ert-deftest test-seq-some-p ()
+ (with-test-sequences (seq '(4 3 2 1))
+ (should (= (seq-some-p #'test-sequences-evenp seq) 4))
+ (should (= (seq-some-p #'test-sequences-oddp seq) 3))
+ (should-not (seq-some-p (lambda (elt) (> elt 10)) seq)))
+ (with-test-sequences (seq '())
+ (should-not (seq-some-p #'test-sequences-oddp seq))))
+
+(ert-deftest test-seq-contains-p ()
+ (with-test-sequences (seq '(3 4 5 6))
+ (should (seq-contains-p seq 3))
+ (should-not (seq-contains-p seq 7)))
+ (with-test-sequences (seq '())
+ (should-not (seq-contains-p seq 3))
+ (should-not (seq-contains-p seq nil))))
+
+(ert-deftest test-seq-every-p ()
+ (with-test-sequences (seq '(43 54 22 1))
+ (should (seq-every-p (lambda (elt) t) seq))
+ (should-not (seq-every-p #'test-sequences-oddp seq))
+ (should-not (seq-every-p #'test-sequences-evenp seq)))
+ (with-test-sequences (seq '(42 54 22 2))
+ (should (seq-every-p #'test-sequences-evenp seq))
+ (should-not (seq-every-p #'test-sequences-oddp seq)))
+ (with-test-sequences (seq '())
+ (should (seq-every-p #'identity seq))
+ (should (seq-every-p #'test-sequences-evenp seq))))
+
+(ert-deftest test-seq-empty-p ()
+ (with-test-sequences (seq '(0))
+ (should-not (seq-empty-p seq)))
+ (with-test-sequences (seq '(0 1 2))
+ (should-not (seq-empty-p seq)))
+ (with-test-sequences (seq '())
+ (should (seq-empty-p seq))))
+
+(ert-deftest test-seq-sort ()
+ (should (equal (seq-sort #'< "cbaf") "abcf"))
+ (should (equal (seq-sort #'< '(2 1 9 4)) '(1 2 4 9)))
+ (should (equal (seq-sort #'< [2 1 9 4]) [1 2 4 9]))
+ (should (equal (seq-sort #'< "") "")))
+
+(ert-deftest test-seq-uniq ()
+ (with-test-sequences (seq '(2 4 6 8 6 4 3))
+ (should (equal (seq-uniq seq) '(2 4 6 8 3))))
+ (with-test-sequences (seq '(3 3 3 3 3))
+ (should (equal (seq-uniq seq) '(3))))
+ (with-test-sequences (seq '())
+ (should (equal (seq-uniq seq) '()))))
+
+(ert-deftest test-seq-subseq ()
+ (with-test-sequences (seq '(2 3 4 5))
+ (should (equal (seq-subseq seq 0 4) seq))
+ (should (same-contents-p (seq-subseq seq 2 4) '(4 5)))
+ (should (same-contents-p (seq-subseq seq 1 3) '(3 4)))
+ (should (same-contents-p (seq-subseq seq 1 -1) '(3 4))))
+ (should (vectorp (seq-subseq [2 3 4 5] 2)))
+ (should (stringp (seq-subseq "foo" 2 3)))
+ (should (listp (seq-subseq '(2 3 4 4) 2 3))))
+
+(ert-deftest test-seq-concatenate ()
+ (with-test-sequences (seq '(2 4 6))
+ (should (equal (seq-concatenate 'string seq [8]) (string 2 4 6 8)))
+ (should (equal (seq-concatenate 'list seq '(8 10)) '(2 4 6 8 10)))
+ (should (equal (seq-concatenate 'vector seq '(8 10)) [2 4 6 8 10]))
+ (should (equal (seq-concatenate 'vector nil '(8 10)) [8 10]))
+ (should (equal (seq-concatenate 'vector seq nil) [2 4 6]))))
+
+(provide 'seq-tests)
+;;; seq-tests.el ends here