|
428
|
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@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
|
|
776
|
30 ;; This file must be loaded by temacs if temacs is to process bytecode or
|
|
|
31 ;; dumped-lisp.el files. The functions in here are used by dumped-lisp.el,
|
|
|
32 ;; and by files called dumped-lisp.el in packages when they need to have
|
|
|
33 ;; stuff dumped into XEmacs. (???? I thought we got rid of this entirely.
|
|
|
34 ;; The only thing left is egg-its/dumped-lisp.el. We should fix it, then
|
|
|
35 ;; combine this file into our own dumped-lisp.el. --ben
|
|
428
|
36
|
|
|
37 ;;; Code:
|
|
|
38
|
|
|
39 ;;; Intended replacement for read-time Lisp reader macros #-, #+
|
|
|
40
|
|
|
41 (defmacro assemble-list (&rest components)
|
|
|
42 "Assemble a list from COMPONENTS.
|
|
|
43 This is a poor man's backquote:
|
|
|
44 COMPONENTS is a list, each element of which is macro-expanded.
|
|
|
45 Each macro-expanded element either has the form (SPLICE stuff),
|
|
|
46 in which case stuff must be a list which is spliced into the result.
|
|
|
47 Otherwise, the component becomes an element of the list."
|
|
|
48 (cons
|
|
|
49 'append
|
|
|
50 (mapcar #'(lambda (component)
|
|
|
51 (let ((component (macroexpand-internal component)))
|
|
|
52 (if (and (consp component)
|
|
|
53 (eq 'splice (car component)))
|
|
|
54 (car (cdr component))
|
|
|
55 (list 'list component))))
|
|
|
56 components)))
|
|
|
57
|
|
|
58 (defmacro when-feature (feature stuff)
|
|
|
59 "Insert STUFF as a list element if FEATURE is a loaded feature.
|
|
|
60 This is intended for use as a component of ASSEMBLE-LIST."
|
|
|
61 (list 'splice
|
|
|
62 (list 'if (list 'featurep (list 'quote feature))
|
|
|
63 (list 'list stuff)
|
|
|
64 '())))
|
|
|
65
|
|
|
66 (defmacro unless-feature (feature stuff)
|
|
|
67 "Insert STUFF as a list element if FEATURE is NOT a loaded feature.
|
|
|
68 This is intended for use as a component of ASSEMBLE-LIST."
|
|
|
69 (list 'splice
|
|
|
70 (list 'if (list 'featurep (list 'quote feature))
|
|
|
71 '()
|
|
|
72 (list 'list stuff))))
|
|
|
73
|
|
|
74 (provide 'very-early-lisp)
|
|
|
75
|
|
|
76 ;;; very-early-lisp.el ends here
|
