/usr/share/xemacs-21.4.22/lisp/very-early-lisp.el is in xemacs21-support 21.4.22-14ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | ;;; very-early-lisp.el --- Lisp support always needed by temacs
;; Copyright (C) 1998 by Free Software Foundation, Inc.
;; Author: SL Baur <steve@xemacs.org>
;; Michael Sperber [Mr. Preprocessor] <sperber@Informatik.Uni-Tuebingen.De>
;; Keywords: internal, dumped
;; This file is part of XEmacs.
;; XEmacs 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 2, or (at your option)
;; any later version.
;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.
;;; Synched up with: Not in FSF
;;; Commentary:
;; This file must be loaded by temacs if temacs is to process bytecode
;; or dumped-lisp.el files.
;;; Code:
;;; Intended replacement for read-time Lisp reader macros #-, #+
(defmacro assemble-list (&rest components)
"Assemble a list from COMPONENTS.
This is a poor man's backquote:
COMPONENTS is a list, each element of which is macro-expanded.
Each macro-expanded element either has the form (SPLICE stuff),
in which case stuff must be a list which is spliced into the result.
Otherwise, the component becomes an element of the list."
(cons
'append
(mapcar #'(lambda (component)
(let ((component (macroexpand-internal component)))
(if (and (consp component)
(eq 'splice (car component)))
(car (cdr component))
(list 'list component))))
components)))
(defmacro when-feature (feature stuff)
"Insert STUFF as a list element if FEATURE is a loaded feature.
This is intended for use as a component of ASSEMBLE-LIST."
(list 'splice
(list 'if (list 'featurep (list 'quote feature))
(list 'list stuff)
'())))
(defmacro unless-feature (feature stuff)
"Insert STUFF as a list element if FEATURE is NOT a loaded feature.
This is intended for use as a component of ASSEMBLE-LIST."
(list 'splice
(list 'if (list 'featurep (list 'quote feature))
'()
(list 'list stuff))))
(provide 'very-early-lisp)
;;; very-early-lisp.el ends here
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