;;; pcustom.el -- a portable custom.el.
+
;; Copyright (C) 1999 Mikio Nakajima <minakaji@osaka.email.ne.jp>
+;; Copyright (C) 1999 Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
;; Author: Mikio Nakajima <minakaji@osaka.email.ne.jp>
+;; Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
;; Maintainer: Mikio Nakajima <minakaji@osaka.email.ne.jp>
-;; Version: $Id: pcustom.el,v 1.1 1999-03-16 11:51:29 morioka Exp $
;; Keywords: emulating, custom
-;; Last Modified: $Date: 1999-03-16 11:51:29 $
-;; This file is not part of APEL (A Portable Emacs Library) yet.
+;; This file is part of APEL (A Portable Emacs Library).
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; along with this program; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
-;;; Commentary:
;;; Code:
-(condition-case nil
+;; If old compiler is used under v18, `eval-when-compile' and
+;; `static-if' are expanded (and evaluated) at *load-time*.
+(eval-when-compile (require 'static))
+
+;; XXX: needs better abstraction.
+(static-if (condition-case nil
+ ;; compile-time check.
+ ;; "new custom" requires widget library.
+ (and (require 'widget)
+ (require 'custom)
+ (fboundp 'custom-declare-variable))
+ (error nil))
+ ;; you have "new custom". no load-time check.
(require 'custom)
- (error (require 'tinycustom)) )
+ ;; your custom is "old custom", or you don't have custom library.
+ (or (condition-case nil
+ ;; load-time check.
+ ;; "new custom" requires widget library.
+ (and (require 'widget)
+ (require 'custom)
+ (fboundp 'custom-declare-variable))
+ (error nil))
+ ;; load emulation version.
+ (require 'tinycustom)))
(provide 'pcustom)
+
;; end of pcustom.el
projects / elisp / apel.git / blobdiff