Mercurial > hg > xemacs-beta
comparison lisp/very-early-lisp.el @ 304:c6de09ad3017 r21-0b50
Import from CVS: tag r21-0b50
author | cvs |
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date | Mon, 13 Aug 2007 10:41:12 +0200 |
parents | |
children | 8429d81ab209 |
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1 ;;; very-early-lisp.el --- Lisp support always needed by temacs | |
2 | |
3 ;; Copyright (C) 1998 by Free Software Foundation, Inc. | |
4 | |
5 ;; Author: SL Baur <steve@altair.xemacs.org> | |
6 ;; Michael Sperber [Mr. Preprocessor] <sperber@Informatik.Uni-Tuebingen.De> | |
7 ;; Keywords: internal, dumped | |
8 | |
9 ;; This file is part of XEmacs. | |
10 | |
11 ;; XEmacs is free software; you can redistribute it and/or modify it | |
12 ;; under the terms of the GNU General Public License as published by | |
13 ;; the Free Software Foundation; either version 2, or (at your option) | |
14 ;; any later version. | |
15 | |
16 ;; XEmacs is distributed in the hope that it will be useful, but | |
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 ;; General Public License for more details. | |
20 | |
21 ;; You should have received a copy of the GNU General Public License | |
22 ;; along with XEmacs; see the file COPYING. If not, write to the Free | |
23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
24 ;; 02111-1307, USA. | |
25 | |
26 ;;; Synched up with: Not in FSF | |
27 | |
28 ;;; Commentary: | |
29 | |
30 ;; This file must be loaded by temacs if temacs is to process bytecode | |
31 ;; or dumped-lisp.el files. | |
32 | |
33 ;;; Code: | |
34 | |
35 (define-function 'defalias 'define-function) | |
36 | |
37 ;;; Macros from Michael Sperber to replace read-time Lisp reader macros #-, #+ | |
38 ;;; ####fixme duplicated in make-docfile.el and update-elc.el | |
39 (defmacro assemble-list (&rest components) | |
40 "Assemble a list from COMPONENTS. | |
41 This is a poor man's backquote: | |
42 COMPONENTS is a list, each element of which is macro-expanded. | |
43 Each macro-expanded element either has the form (SPLICE stuff), | |
44 in which case stuff must be a list which is spliced into the result. | |
45 Otherwise, the component becomes an element of the list." | |
46 (cons | |
47 'append | |
48 (mapcar #'(lambda (component) | |
49 (let ((component (macroexpand-internal component))) | |
50 (if (and (consp component) | |
51 (eq 'splice (car component))) | |
52 (car (cdr component)) | |
53 (list 'list component)))) | |
54 components))) | |
55 | |
56 (defmacro when-feature (feature stuff) | |
57 "Insert STUFF as a list element if FEATURE is a loaded feature. | |
58 This is intended for use as a component of ASSEMBLE-LIST." | |
59 (list 'splice | |
60 (if (featurep feature) | |
61 (list 'list stuff) | |
62 '()))) | |
63 | |
64 (defmacro unless-feature (feature stuff) | |
65 "Insert STUFF as a list element if FEATURE is NOT a loaded feature. | |
66 This is intended for use as a component of ASSEMBLE-LIST." | |
67 (list 'splice | |
68 (if (featurep feature) | |
69 '() | |
70 (list 'list stuff)))) | |
71 | |
72 (provide 'very-early-lisp) | |
73 | |
74 ;;; very-early-lisp.el ends here |