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| author | Basil L. Contovounesios <contovob@tcd.ie> | 2018-07-09 18:46:33 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2018-07-09 19:00:43 -0700 |
| commit | 2fde6275b69fd113e78243790bf112bbdd2fe2bf (patch) | |
| tree | f28a04fdabc51d275689066b41b9149422d9f3cb /lisp/emacs-lisp/byte-opt.el | |
| parent | e4ad2d1a8fad8c8c786b61083b05cfaa1ea5669c (diff) | |
| download | emacs-2fde6275b69fd113e78243790bf112bbdd2fe2bf.tar.gz emacs-2fde6275b69fd113e78243790bf112bbdd2fe2bf.tar.bz2 emacs-2fde6275b69fd113e78243790bf112bbdd2fe2bf.zip | |
Add predicate proper-list-p
For discussion, see emacs-devel thread starting at
https://lists.gnu.org/archive/html/emacs-devel/2018-04/msg00460.html.
* lisp/subr.el (proper-list-p): New function.
Implementation suggested by Paul Eggert <eggert@cs.ucla.edu> in
https://lists.gnu.org/archive/html/emacs-devel/2018-06/msg00138.html.
* doc/lispref/lists.texi (List Elements):
* etc/NEWS: Document proper-list-p.
* lisp/org/ob-core.el (org-babel-insert-result):
* lisp/emacs-lisp/byte-opt.el (byte-optimize-if):
* lisp/emacs-lisp/cl-macs.el (cl--make-usage-args): Use proper-list-p.
* lisp/emacs-lisp/ert.el (ert--proper-list-p): Remove.
Replaced by proper-list-p in lisp/subr.el.
(ert--explain-equal-rec): Use proper-list-length.
* lisp/format.el (format-proper-list-p): Remove.
Replaced by proper-list-p in lisp/subr.el.
(format-annotate-single-property-change): Use proper-list-p.
* test/lisp/emacs-lisp/ert-tests.el (ert-test-proper-list-p):
Move from here...
* test/lisp/subr-tests.el (subr-tests--proper-list-length):
...to here, mutatis mutandis.
Diffstat (limited to 'lisp/emacs-lisp/byte-opt.el')
| -rw-r--r-- | lisp/emacs-lisp/byte-opt.el | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el index 3bc4c438d6a..5c0b5e340bb 100644 --- a/lisp/emacs-lisp/byte-opt.el +++ b/lisp/emacs-lisp/byte-opt.el @@ -982,8 +982,7 @@ ;; (if <test> <then> nil) ==> (if <test> <then>) (let ((clause (nth 1 form))) (cond ((and (eq (car-safe clause) 'progn) - ;; `clause' is a proper list. - (null (cdr (last clause)))) + (proper-list-p clause)) (if (null (cddr clause)) ;; A trivial `progn'. (byte-optimize-if `(if ,(cadr clause) ,@(nthcdr 2 form))) |