source: trunk/abcl/src/org/armedbear/lisp/defpackage.lisp @ 14196

Last change on this file since 14196 was 11391, checked in by vvoutilainen, 12 years ago

ABCL license is GPL + Classpath exception. This was intended
by Peter Graves, the original author. For reference, see

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 5.1 KB
1;;; defpackage.lisp
3;;; Copyright (C) 2003-2007 Peter Graves
4;;; $Id: defpackage.lisp 11391 2008-11-15 22:38:34Z vvoutilainen $
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14;;; GNU General Public License for more details.
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
20;;; As a special exception, the copyright holders of this library give you
21;;; permission to link this library with independent modules to produce an
22;;; executable, regardless of the license terms of these independent
23;;; modules, and to copy and distribute the resulting executable under
24;;; terms of your choice, provided that you also meet, for each linked
25;;; independent module, the terms and conditions of the license of that
26;;; module.  An independent module is a module which is not derived from
27;;; or based on this library.  If you modify this library, you may extend
28;;; this exception to your version of the library, but you are not
29;;; obligated to do so.  If you do not wish to do so, delete this
30;;; exception statement from your version.
32(in-package "SYSTEM")
34;;; Adapted from CMUCL.
36(defun designated-package-name (designator)
37  (cond ((packagep designator)
38         (package-name designator))
39        (t
40         (string designator))))
42(defun stringify-names (names)
43  (mapcar #'string names))
45(defun check-disjoint (&rest args)
46  (let ((rest-args args))
47    (dolist (arg1 args)
48      (let ((key1 (car arg1))
49            (set1 (cdr arg1)))
50        (setq rest-args (cdr rest-args))
51        (dolist (arg2 rest-args)
52          (let* ((key2 (car arg2))
53                 (set2 (cdr arg2))
54                 (common (remove-duplicates (intersection set1 set2 :test #'string=))))
55            (when common
56              (error 'program-error
57                     :format-control
58                     "Parameters ~S and ~S must be disjoint, but have common elements: ~S"
59                     :format-arguments
60                     (list key1 key2 common)))))))))
62(defun ensure-available-symbols (symbols)
63   symbols)
65(defmacro defpackage (package &rest options)
66  (let ((nicknames nil)
67  (size nil)
68  (shadows nil)
69  (shadowing-imports nil)
70  (use nil)
71  (use-p nil)
72  (imports nil)
73  (interns nil)
74  (exports nil)
75  (doc nil))
76    (dolist (option options)
77      (unless (consp option)
78  (error 'program-error "bad DEFPACKAGE option: ~S" option))
79      (case (car option)
80  (:nicknames
81   (setq nicknames (stringify-names (cdr option))))
82  (:size
83   (cond (size
84    (error 'program-error "can't specify :SIZE twice"))
85         ((and (consp (cdr option))
86         (typep (second option) 'unsigned-byte))
87    (setq size (second option)))
88         (t
89    (error 'program-error
90     "bad :SIZE, must be a positive integer: ~S"
91     (second option)))))
92  (:shadow
93   (let ((new (stringify-names (cdr option))))
94     (setq shadows (append shadows new))))
95  (:shadowing-import-from
96   (let ((package-name (designated-package-name (cadr option)))
97         (symbol-names (stringify-names (cddr option))))
98     (let ((assoc (assoc package-name shadowing-imports
99             :test #'string=)))
100       (if assoc
101     (setf (cdr assoc) (append (cdr assoc) symbol-names))
102     (setq shadowing-imports
103           (acons package-name symbol-names shadowing-imports))))))
104  (:use
105   (let ((new (mapcar #'designated-package-name (cdr option))))
106     (setq use (delete-duplicates (nconc use new) :test #'string=))
107     (setq use-p t)))
108  (:import-from
109   (let ((package-name (designated-package-name (cadr option)))
110         (symbol-names (stringify-names (cddr option))))
111     (let ((assoc (assoc package-name imports
112             :test #'string=)))
113       (if assoc
114     (setf (cdr assoc) (append (cdr assoc) symbol-names))
115     (setq imports (acons package-name symbol-names imports))))))
116  (:intern
117   (let ((new (stringify-names (cdr option))))
118     (setq interns (append interns new))))
119  (:export
120   (let ((new (stringify-names (cdr option))))
121     (setq exports (append exports new))))
122  (:documentation
123   (when doc
124     (error 'program-error "can't specify :DOCUMENTATION twice"))
125   (setq doc (coerce (cadr option) 'simple-string)))
126  (t
127   (error 'program-error "bad DEFPACKAGE option: ~S" option))))
128    (check-disjoint `(:intern ,@interns) `(:export  ,@exports))
129    (check-disjoint `(:intern ,@interns)
130        `(:import-from
131          ,@(apply #'append (mapcar #'rest imports)))
132        `(:shadow ,@shadows)
133        `(:shadowing-import-from
134          ,@(apply #'append (mapcar #'rest shadowing-imports))))
135    `(%defpackage ,(string package) ',nicknames ',size
136                  ',shadows (ensure-available-symbols ',shadowing-imports)
137                  ',(if use-p use nil)
138                  (ensure-available-symbols ',imports) ',interns ',exports ',doc)))
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