source: trunk/j/src/org/armedbear/lisp/proclaim.lisp @ 11391

Last change on this file since 11391 was 11391, checked in by vvoutilainen, 13 years ago

ABCL license is GPL + Classpath exception. This was intended
by Peter Graves, the original author. For reference, see
http://sourceforge.net/mailarchive/forum.php?thread_name=20040721115302.839%40prufrock&forum_name=armedbear-j-announce

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 5.5 KB
Line 
1;;; proclaim.lisp
2;;;
3;;; Copyright (C) 2003-2006 Peter Graves
4;;; $Id: proclaim.lisp 11391 2008-11-15 22:38:34Z vvoutilainen $
5;;;
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.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19;;;
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.
31
32(in-package #:system)
33
34(export '(check-declaration-type proclaimed-type proclaimed-ftype ftype-result-type))
35
36(defmacro declaim (&rest decls)
37`(eval-when (:compile-toplevel :load-toplevel :execute)
38   ,@(mapcar (lambda (decl) `(proclaim ',decl))
39             decls)))
40
41(defun declaration-error (name)
42  (error 'simple-error
43         :format-control "The symbol ~S cannot be both the name of a type and the name of a declaration."
44         :format-arguments (list name)))
45
46(defvar *declaration-types* (make-hash-table :test 'eq))
47
48;; "A symbol cannot be both the name of a type and the name of a declaration.
49;; Defining a symbol as the name of a class, structure, condition, or type,
50;; when the symbol has been declared as a declaration name, or vice versa,
51;; signals an error."
52(defun check-declaration-type (name)
53  (when (gethash1 name (the hash-table *declaration-types*))
54    (declaration-error name)))
55
56(defun proclaim (declaration-specifier)
57  (unless (symbolp (car declaration-specifier))
58    (%type-error (car declaration-specifier) 'symbol))
59  ;; (cdr declaration-specifier) must be a proper list.
60  (unless (listp (cddr declaration-specifier))
61    (%type-error (cddr declaration-specifier) 'list))
62  (case (car declaration-specifier)
63    (SPECIAL
64     (dolist (name (cdr declaration-specifier))
65       (%defvar name)))
66    (OPTIMIZE
67     (dolist (spec (cdr declaration-specifier))
68       (let ((val 3)
69             (quality spec))
70         (when (consp spec)
71           (setf quality (%car spec)
72                 val (cadr spec)))
73         (when (and (fixnump val)
74                    (<= 0 val 3))
75           (case quality
76             (SPEED
77              (setf *speed* val))
78             (SPACE
79              (setf *space* val))
80             (SAFETY
81              (setf *safety* val))
82             (DEBUG
83              (setf *debug* val)))))))
84    (FTYPE
85     (unless (cdr declaration-specifier)
86       (error "No type specified in FTYPE declaration: ~S" declaration-specifier))
87     (apply 'proclaim-ftype (cdr declaration-specifier)))
88    (TYPE
89     (unless (cdr declaration-specifier)
90       (error "No type specified in TYPE declaration: ~S" declaration-specifier))
91     (apply 'proclaim-type (cdr declaration-specifier)))
92    ((INLINE NOTINLINE)
93     (dolist (name (cdr declaration-specifier))
94       (when (symbolp name) ; FIXME Need to support non-symbol function names.
95         (setf (get name '%inline) (car declaration-specifier)))))
96    (DECLARATION
97     (dolist (name (cdr declaration-specifier))
98       (when (or (get name 'deftype-definition)
99                 (find-class name nil))
100         (declaration-error name))
101       (setf (gethash name (the hash-table *declaration-types*)) name)))
102    (:explain
103     (dolist (spec (cdr declaration-specifier))
104       (let ((val t)
105             (quality spec))
106         (when (consp spec)
107           (setf quality (%car spec))
108           (when (= (length spec) 2)
109             (setf val (%cadr spec))))
110         (if val
111             (pushnew quality *explain*)
112             (setf *explain* (remove quality *explain*))))))))
113
114(defun proclaim-type (type &rest names)
115  (dolist (name names)
116    (setf (get name 'proclaimed-type) type)))
117
118(defun proclaimed-type (name)
119  (get name 'proclaimed-type))
120
121(declaim (type hash-table *proclaimed-ftypes*))
122(defconst *proclaimed-ftypes* (make-hash-table :test 'equal))
123
124(declaim (inline proclaim-ftype-1))
125(defun proclaim-ftype-1 (ftype name)
126  (declare (optimize speed))
127  (if (symbolp name)
128      (setf (get name 'proclaimed-ftype) ftype)
129      (setf (gethash name *proclaimed-ftypes*) ftype)))
130(declaim (notinline proclaim-ftype-1))
131
132(defun proclaim-ftype (ftype &rest names)
133  (declare (optimize speed))
134  (declare (inline proclaim-ftype-1))
135  (dolist (name names)
136    (proclaim-ftype-1 ftype name)))
137
138(defun proclaimed-ftype (name)
139  (if (symbolp name)
140      (get name 'proclaimed-ftype)
141      (gethash1 name *proclaimed-ftypes*)))
142
143(defun ftype-result-type (ftype)
144  (if (atom ftype)
145      '*
146      (let ((result-type (third ftype)))
147        (if result-type
148            result-type
149            '*))))
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