1 ;;;; macros, global variable definitions, and other miscellaneous support stuff
2 ;;;; used by the rest of the PCL subsystem
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from software originally released by Xerox
8 ;;;; Corporation. Copyright and release statements follow. Later modifications
9 ;;;; to the software are in the public domain and are provided with
10 ;;;; absolutely no warranty. See the COPYING and CREDITS files for more
13 ;;;; copyright information from original PCL sources:
15 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
16 ;;;; All rights reserved.
18 ;;;; Use and copying of this software and preparation of derivative works based
19 ;;;; upon this software are permitted. Any distribution of this software or
20 ;;;; derivative works must comply with all applicable United States export
23 ;;;; This software is made available AS IS, and Xerox Corporation makes no
24 ;;;; warranty about the software, its performance or its conformity to any
29 (/show "starting pcl/macros.lisp")
32 ;; As of sbcl-0.7.0.6, SBCL actively uses this declaration
33 ;; to propagate information needed to set up nice debug
34 ;; names (as seen e.g. in BACKTRACE) for method functions.
36 ;; These nonstandard declarations seem to be used privately
37 ;; within PCL itself to pass information around, so we can't
41 ;; This declaration may also be used within PCL to pass
42 ;; information around, I'm not sure. -- WHN 2000-12-30
45 (/show "done with DECLAIM DECLARATION")
47 (defun get-declaration (name declarations &optional default)
48 (dolist (d declarations default)
49 (dolist (form (cdr d))
50 (when (and (consp form) (eq (car form) name))
51 (return-from get-declaration (cdr form))))))
53 (/show "pcl/macros.lisp 85")
55 (defmacro doplist ((key val) plist &body body)
56 `(let ((.plist-tail. ,plist) ,key ,val)
57 (loop (when (null .plist-tail.) (return nil))
58 (setq ,key (pop .plist-tail.))
59 (when (null .plist-tail.)
60 (error "malformed plist, odd number of elements"))
61 (setq ,val (pop .plist-tail.))
64 (/show "pcl/macros.lisp 101")
66 (defmacro dolist-carefully ((var list improper-list-handler) &body body)
68 (.dolist-carefully. ,list))
69 (loop (when (null .dolist-carefully.) (return nil))
70 (if (consp .dolist-carefully.)
72 (setq ,var (pop .dolist-carefully.))
74 (,improper-list-handler)))))
78 ;;;; This is documented in the CLOS specification.
80 (/show "pcl/macros.lisp 119")
82 (defvar *find-class* (make-hash-table :test 'eq))
84 (defmacro find-class-cell-class (cell)
87 (defmacro find-class-cell-predicate (cell)
90 (defmacro make-find-class-cell (class-name)
91 (declare (ignore class-name))
92 '(list* nil #'constantly-nil nil))
94 (defun find-class-cell (symbol &optional dont-create-p)
95 (or (gethash symbol *find-class*)
97 (unless (legal-class-name-p symbol)
98 (error "~S is not a legal class name." symbol))
99 (setf (gethash symbol *find-class*) (make-find-class-cell symbol)))))
101 (/show "pcl/macros.lisp 157")
103 (defvar *create-classes-from-internal-structure-definitions-p* t)
105 (defun find-class-from-cell (symbol cell &optional (errorp t))
106 (or (find-class-cell-class cell)
107 (and *create-classes-from-internal-structure-definitions-p*
108 (or (structure-type-p symbol) (condition-type-p symbol))
109 (ensure-non-standard-class symbol))
110 (cond ((null errorp) nil)
111 ((legal-class-name-p symbol)
112 (error "There is no class named ~S." symbol))
114 (error "~S is not a legal class name." symbol)))))
116 (defun find-class-predicate-from-cell (symbol cell &optional (errorp t))
117 (unless (find-class-cell-class cell)
118 (find-class-from-cell symbol cell errorp))
119 (find-class-cell-predicate cell))
121 (defun legal-class-name-p (x)
124 (defun find-class (symbol &optional (errorp t) environment)
125 (declare (ignore environment))
126 (find-class-from-cell symbol
127 (find-class-cell symbol errorp)
130 (defun find-class-predicate (symbol &optional (errorp t) environment)
131 (declare (ignore environment))
132 (find-class-predicate-from-cell symbol
133 (find-class-cell symbol errorp)
136 ;;; This DEFVAR was originally in defs.lisp, now moved here.
138 ;;; Possible values are NIL, EARLY, BRAID, or COMPLETE.
140 ;;; KLUDGE: This should probably become
141 ;;; (DECLAIM (TYPE (MEMBER NIL :EARLY :BRAID :COMPLETE) *BOOT-STATE*))
142 (defvar *boot-state* nil)
144 (/show "pcl/macros.lisp 187")
146 (define-compiler-macro find-class (&whole form
147 symbol &optional (errorp t) environment)
148 (declare (ignore environment))
149 (if (and (constantp symbol)
150 (legal-class-name-p (eval symbol))
152 (member *boot-state* '(braid complete)))
153 (let ((symbol (eval symbol))
154 (errorp (not (null (eval errorp))))
155 (class-cell (make-symbol "CLASS-CELL")))
156 `(let ((,class-cell (load-time-value (find-class-cell ',symbol))))
157 (or (find-class-cell-class ,class-cell)
159 `(find-class-from-cell ',symbol ,class-cell t)
160 `(and (classoid-cell-classoid
161 ',(find-classoid-cell symbol))
162 (find-class-from-cell ',symbol ,class-cell nil))))))
165 (defun (setf find-class) (new-value name &optional errorp environment)
166 (declare (ignore errorp environment))
167 (cond ((legal-class-name-p name)
168 (with-single-package-locked-error
169 (:symbol name "using ~A as the class-name argument in ~
171 (let ((cell (find-class-cell name)))
172 (setf (find-class-cell-class cell) new-value)
173 (when (and (eq *boot-state* 'complete) (null new-value))
174 (setf (find-classoid name) nil))
175 (when (or (eq *boot-state* 'complete)
176 (eq *boot-state* 'braid))
177 (when (and new-value (class-wrapper new-value)
178 (class-predicate-name new-value))
179 (setf (find-class-cell-predicate cell)
180 (fdefinition (class-predicate-name new-value))))
181 (update-ctors 'setf-find-class :class new-value :name name))
184 (error "~S is not a legal class name." name))))
186 (/show "pcl/macros.lisp 230")
188 (defun (setf find-class-predicate)
190 (if (legal-class-name-p symbol)
191 (setf (find-class-cell-predicate (find-class-cell symbol)) new-value)
192 (error "~S is not a legal class name." symbol)))
194 (defun find-wrapper (symbol)
195 (class-wrapper (find-class symbol)))
197 (/show "pcl/macros.lisp 241")
199 (defmacro function-funcall (form &rest args)
200 `(funcall (the function ,form) ,@args))
202 (defmacro function-apply (form &rest args)
203 `(apply (the function ,form) ,@args))
205 (/show "pcl/macros.lisp 249")
207 (defun get-setf-fun-name (name)
210 (defsetf slot-value set-slot-value)
212 (/show "finished with pcl/macros.lisp")