0.9.1.7: "fix" SB-SPROF on non-gencgc platforms
[sbcl.git] / src / pcl / braid.lisp
1 ;;;; bootstrapping the meta-braid
2 ;;;;
3 ;;;; The code in this file takes the early definitions that have been
4 ;;;; saved up and actually builds those class objects. This work is
5 ;;;; largely driven off of those class definitions, but the fact that
6 ;;;; STANDARD-CLASS is the class of all metaclasses in the braid is
7 ;;;; built into this code pretty deeply.
8
9 ;;;; This software is part of the SBCL system. See the README file for
10 ;;;; more information.
11
12 ;;;; This software is derived from software originally released by Xerox
13 ;;;; Corporation. Copyright and release statements follow. Later modifications
14 ;;;; to the software are in the public domain and are provided with
15 ;;;; absolutely no warranty. See the COPYING and CREDITS files for more
16 ;;;; information.
17
18 ;;;; copyright information from original PCL sources:
19 ;;;;
20 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
21 ;;;; All rights reserved.
22 ;;;;
23 ;;;; Use and copying of this software and preparation of derivative works based
24 ;;;; upon this software are permitted. Any distribution of this software or
25 ;;;; derivative works must comply with all applicable United States export
26 ;;;; control laws.
27 ;;;;
28 ;;;; This software is made available AS IS, and Xerox Corporation makes no
29 ;;;; warranty about the software, its performance or its conformity to any
30 ;;;; specification.
31
32 (in-package "SB-PCL")
33 \f
34 (defun allocate-standard-instance (wrapper
35                                    &optional (slots-init nil slots-init-p))
36   (let ((instance (%make-standard-instance nil (get-instance-hash-code)))
37         (no-of-slots (wrapper-no-of-instance-slots wrapper)))
38     (setf (std-instance-wrapper instance) wrapper)
39     (setf (std-instance-slots instance)
40           (cond (slots-init-p
41                  ;; Inline the slots vector allocation and initialization.
42                  (let ((slots (make-array no-of-slots :initial-element 0)))
43                    (do ((rem-slots slots-init (rest rem-slots))
44                         (i 0 (1+ i)))
45                        ((>= i no-of-slots)) ;endp rem-slots))
46                      (declare (list rem-slots)
47                               (type index i))
48                      (setf (aref slots i) (first rem-slots)))
49                    slots))
50                 (t
51                  (make-array no-of-slots
52                              :initial-element +slot-unbound+))))
53     instance))
54
55 (defmacro allocate-funcallable-instance-slots (wrapper &optional
56                                                        slots-init-p slots-init)
57   `(let ((no-of-slots (wrapper-no-of-instance-slots ,wrapper)))
58      ,(if slots-init-p
59           `(if ,slots-init-p
60                (make-array no-of-slots :initial-contents ,slots-init)
61                (make-array no-of-slots :initial-element +slot-unbound+))
62           `(make-array no-of-slots :initial-element +slot-unbound+))))
63
64 (defun allocate-funcallable-instance (wrapper &optional
65                                               (slots-init nil slots-init-p))
66   (let ((fin (%make-pcl-funcallable-instance nil nil
67                                              (get-instance-hash-code))))
68     (set-funcallable-instance-function
69      fin
70      #'(instance-lambda (&rest args)
71          (declare (ignore args))
72          (error "The function of the funcallable-instance ~S has not been set."
73                 fin)))
74     (setf (fsc-instance-wrapper fin) wrapper
75           (fsc-instance-slots fin) (allocate-funcallable-instance-slots
76                                     wrapper slots-init-p slots-init))
77     fin))
78
79 (defun allocate-structure-instance (wrapper &optional
80                                             (slots-init nil slots-init-p))
81   (let* ((class (wrapper-class wrapper))
82          (constructor (class-defstruct-constructor class)))
83     (if constructor
84         (let ((instance (funcall constructor))
85               (slots (class-slots class)))
86           (when slots-init-p
87             (dolist (slot slots)
88               (setf (slot-value-using-class class instance slot)
89                     (pop slots-init))))
90           instance)
91         (error "can't allocate an instance of class ~S" (class-name class)))))
92 \f
93 ;;;; BOOTSTRAP-META-BRAID
94 ;;;;
95 ;;;; This function builds the base metabraid from the early class definitions.
96
97 (defmacro !initial-classes-and-wrappers (&rest classes)
98   `(progn
99      ,@(mapcar (lambda (class)
100                  (let ((wr (format-symbol *pcl-package* "~A-WRAPPER" class)))
101                    `(setf ,wr ,(if (eq class 'standard-generic-function)
102                                    '*sgf-wrapper*
103                                    `(boot-make-wrapper
104                                      (early-class-size ',class)
105                                      ',class))
106                           ,class (allocate-standard-instance
107                                   ,(if (eq class 'standard-generic-function)
108                                        'funcallable-standard-class-wrapper
109                                        'standard-class-wrapper))
110                           (wrapper-class ,wr) ,class
111                           (find-class ',class) ,class)))
112                classes)))
113
114 (defun !bootstrap-meta-braid ()
115   (let* ((*create-classes-from-internal-structure-definitions-p* nil)
116          std-class-wrapper std-class
117          standard-class-wrapper standard-class
118          funcallable-standard-class-wrapper funcallable-standard-class
119          slot-class-wrapper slot-class
120          built-in-class-wrapper built-in-class
121          structure-class-wrapper structure-class
122          condition-class-wrapper condition-class
123          standard-direct-slot-definition-wrapper
124          standard-direct-slot-definition
125          standard-effective-slot-definition-wrapper
126          standard-effective-slot-definition
127          class-eq-specializer-wrapper class-eq-specializer
128          standard-generic-function-wrapper standard-generic-function)
129     (!initial-classes-and-wrappers
130      standard-class funcallable-standard-class
131      slot-class built-in-class structure-class condition-class std-class
132      standard-direct-slot-definition standard-effective-slot-definition
133      class-eq-specializer standard-generic-function)
134     ;; First, make a class metaobject for each of the early classes. For
135     ;; each metaobject we also set its wrapper. Except for the class T,
136     ;; the wrapper is always that of STANDARD-CLASS.
137     (dolist (definition *early-class-definitions*)
138       (let* ((name (ecd-class-name definition))
139              (meta (ecd-metaclass definition))
140              (wrapper (ecase meta
141                         (slot-class slot-class-wrapper)
142                         (std-class std-class-wrapper)
143                         (standard-class standard-class-wrapper)
144                         (funcallable-standard-class
145                          funcallable-standard-class-wrapper)
146                         (built-in-class built-in-class-wrapper)
147                         (structure-class structure-class-wrapper)
148                         (condition-class condition-class-wrapper)))
149              (class (or (find-class name nil)
150                         (allocate-standard-instance wrapper))))
151         (setf (find-class name) class)))
152     (dolist (definition *early-class-definitions*)
153       (let ((name (ecd-class-name definition))
154             (meta (ecd-metaclass definition))
155             (source (ecd-source definition))
156             (direct-supers (ecd-superclass-names definition))
157             (direct-slots  (ecd-canonical-slots definition))
158             (other-initargs (ecd-other-initargs definition)))
159         (let ((direct-default-initargs
160                (getf other-initargs :direct-default-initargs)))
161           (multiple-value-bind (slots cpl default-initargs direct-subclasses)
162               (early-collect-inheritance name)
163             (let* ((class (find-class name))
164                    (wrapper (cond ((eq class slot-class)
165                                    slot-class-wrapper)
166                                   ((eq class std-class)
167                                    std-class-wrapper)
168                                   ((eq class standard-class)
169                                    standard-class-wrapper)
170                                   ((eq class funcallable-standard-class)
171                                    funcallable-standard-class-wrapper)
172                                   ((eq class standard-direct-slot-definition)
173                                    standard-direct-slot-definition-wrapper)
174                                   ((eq class
175                                        standard-effective-slot-definition)
176                                    standard-effective-slot-definition-wrapper)
177                                   ((eq class built-in-class)
178                                    built-in-class-wrapper)
179                                   ((eq class structure-class)
180                                    structure-class-wrapper)
181                                   ((eq class condition-class)
182                                    condition-class-wrapper)
183                                   ((eq class class-eq-specializer)
184                                    class-eq-specializer-wrapper)
185                                   ((eq class standard-generic-function)
186                                    standard-generic-function-wrapper)
187                                   (t
188                                    (boot-make-wrapper (length slots) name))))
189                    (proto nil))
190               (when (eq name t) (setq *the-wrapper-of-t* wrapper))
191               (set (make-class-symbol name) class)
192               (dolist (slot slots)
193                 (unless (eq (getf slot :allocation :instance) :instance)
194                   (error "Slot allocation ~S is not supported in bootstrap."
195                          (getf slot :allocation))))
196
197               (when (typep wrapper 'wrapper)
198                 (setf (wrapper-instance-slots-layout wrapper)
199                       (mapcar #'canonical-slot-name slots))
200                 (setf (wrapper-class-slots wrapper)
201                       ()))
202
203               (setq proto (if (eq meta 'funcallable-standard-class)
204                               (allocate-funcallable-instance wrapper)
205                               (allocate-standard-instance wrapper)))
206
207               (setq direct-slots
208                     (!bootstrap-make-slot-definitions
209                      name class direct-slots
210                      standard-direct-slot-definition-wrapper nil))
211               (setq slots
212                     (!bootstrap-make-slot-definitions
213                      name class slots
214                      standard-effective-slot-definition-wrapper t))
215
216               (case meta
217                 ((std-class standard-class funcallable-standard-class)
218                  (!bootstrap-initialize-class
219                   meta
220                   class name class-eq-specializer-wrapper source
221                   direct-supers direct-subclasses cpl wrapper proto
222                   direct-slots slots direct-default-initargs default-initargs))
223                 (built-in-class         ; *the-class-t*
224                  (!bootstrap-initialize-class
225                   meta
226                   class name class-eq-specializer-wrapper source
227                   direct-supers direct-subclasses cpl wrapper proto))
228                 (slot-class             ; *the-class-slot-object*
229                  (!bootstrap-initialize-class
230                   meta
231                   class name class-eq-specializer-wrapper source
232                   direct-supers direct-subclasses cpl wrapper proto))
233                 (structure-class        ; *the-class-structure-object*
234                  (!bootstrap-initialize-class
235                   meta
236                   class name class-eq-specializer-wrapper source
237                   direct-supers direct-subclasses cpl wrapper))
238                 (condition-class
239                  (!bootstrap-initialize-class
240                   meta
241                   class name class-eq-specializer-wrapper source
242                   direct-supers direct-subclasses cpl wrapper))))))))
243
244     (let* ((smc-class (find-class 'standard-method-combination))
245            (smc-wrapper (!bootstrap-get-slot 'standard-class
246                                              smc-class
247                                              'wrapper))
248            (smc (allocate-standard-instance smc-wrapper)))
249       (flet ((set-slot (name value)
250                (!bootstrap-set-slot 'standard-method-combination
251                                     smc
252                                     name
253                                     value)))
254         (set-slot 'source *load-pathname*)
255         (set-slot 'type 'standard)
256         (set-slot 'documentation "The standard method combination.")
257         (set-slot 'options ()))
258       (setq *standard-method-combination* smc))))
259
260 ;;; Initialize a class metaobject.
261 (defun !bootstrap-initialize-class
262        (metaclass-name class name
263         class-eq-wrapper source direct-supers direct-subclasses cpl wrapper
264         &optional
265         (proto nil proto-p)
266         direct-slots slots direct-default-initargs default-initargs)
267   (flet ((classes (names) (mapcar #'find-class names))
268          (set-slot (slot-name value)
269            (!bootstrap-set-slot metaclass-name class slot-name value)))
270     (set-slot 'name name)
271     (set-slot 'finalized-p t)
272     (set-slot 'source source)
273     (set-slot 'type (if (eq class (find-class t))
274                         t
275                         ;; FIXME: Could this just be CLASS instead
276                         ;; of `(CLASS ,CLASS)? If not, why not?
277                         ;; (See also similar expression in 
278                         ;; SHARED-INITIALIZE :BEFORE (CLASS).)
279                         `(class ,class)))
280     (set-slot 'class-eq-specializer
281               (let ((spec (allocate-standard-instance class-eq-wrapper)))
282                 (!bootstrap-set-slot 'class-eq-specializer spec 'type
283                                      `(class-eq ,class))
284                 (!bootstrap-set-slot 'class-eq-specializer spec 'object
285                                      class)
286                 spec))
287     (set-slot 'class-precedence-list (classes cpl))
288     (set-slot 'cpl-available-p t)
289     (set-slot 'can-precede-list (classes (cdr cpl)))
290     (set-slot 'incompatible-superclass-list nil)
291     (set-slot 'direct-superclasses (classes direct-supers))
292     (set-slot 'direct-subclasses (classes direct-subclasses))
293     (set-slot 'direct-methods (cons nil nil))
294     (set-slot 'wrapper wrapper)
295     (set-slot 'predicate-name (or (cadr (assoc name *early-class-predicates*))
296                                   (make-class-predicate-name name)))
297     (set-slot 'documentation nil)
298     (set-slot 'plist
299               `(,@(and direct-default-initargs
300                        `(direct-default-initargs ,direct-default-initargs))
301                 ,@(and default-initargs
302                        `(default-initargs ,default-initargs))))
303     (when (memq metaclass-name '(standard-class funcallable-standard-class
304                                  structure-class condition-class
305                                  slot-class std-class))
306       (set-slot 'direct-slots direct-slots)
307       (set-slot 'slots slots))
308
309     ;; For all direct superclasses SUPER of CLASS, make sure CLASS is
310     ;; a direct subclass of SUPER.  Note that METACLASS-NAME doesn't
311     ;; matter here for the slot DIRECT-SUBCLASSES, since every class
312     ;; inherits the slot from class CLASS.
313     (dolist (super direct-supers)
314       (let* ((super (find-class super))
315              (subclasses (!bootstrap-get-slot metaclass-name super
316                                               'direct-subclasses)))
317         (cond ((eq +slot-unbound+ subclasses)
318                (!bootstrap-set-slot metaclass-name super 'direct-subclasses
319                                     (list class)))
320               ((not (memq class subclasses))
321                (!bootstrap-set-slot metaclass-name super 'direct-subclasses
322                                     (cons class subclasses))))))
323
324     (case metaclass-name
325       (structure-class
326        (let ((constructor-sym '|STRUCTURE-OBJECT class constructor|))
327          (set-slot 'predicate-name (or (cadr (assoc name
328                                                     *early-class-predicates*))
329                                        (make-class-predicate-name name)))
330          (set-slot 'defstruct-form
331                    `(defstruct (structure-object (:constructor
332                                                   ,constructor-sym)
333                                                  (:copier nil))))
334          (set-slot 'defstruct-constructor constructor-sym)
335          (set-slot 'from-defclass-p t)
336          (set-slot 'plist nil)
337          (set-slot 'prototype (funcall constructor-sym))))
338       (condition-class
339        (set-slot 'prototype (make-condition name)))
340       (t
341        (set-slot 'prototype
342                  (if proto-p proto (allocate-standard-instance wrapper)))))
343     class))
344
345 (defun !bootstrap-make-slot-definitions (name class slots wrapper effective-p)
346   (let ((index -1))
347     (mapcar (lambda (slot)
348               (incf index)
349               (!bootstrap-make-slot-definition
350                name class slot wrapper effective-p index))
351             slots)))
352
353 (defun !bootstrap-make-slot-definition
354     (name class slot wrapper effective-p index)
355   (let* ((slotd-class-name (if effective-p
356                                'standard-effective-slot-definition
357                                'standard-direct-slot-definition))
358          (slotd (allocate-standard-instance wrapper))
359          (slot-name (getf slot :name)))
360     (flet ((get-val (name) (getf slot name))
361            (set-val (name val)
362                     (!bootstrap-set-slot slotd-class-name slotd name val)))
363       (set-val 'name         slot-name)
364       (set-val 'initform     (get-val :initform))
365       (set-val 'initfunction (get-val :initfunction))
366       (set-val 'initargs     (get-val :initargs))
367       (set-val 'readers      (get-val :readers))
368       (set-val 'writers      (get-val :writers))
369       (set-val 'allocation   :instance)
370       (set-val 'type         (or (get-val :type) t))
371       (set-val 'documentation (or (get-val :documentation) ""))
372       (set-val 'class   class)
373       (when effective-p
374         (set-val 'location index)
375         (let ((fsc-p nil))
376           (set-val 'reader-function (make-optimized-std-reader-method-function
377                                      fsc-p nil slot-name index))
378           (set-val 'writer-function (make-optimized-std-writer-method-function
379                                      fsc-p nil slot-name index))
380           (set-val 'boundp-function (make-optimized-std-boundp-method-function
381                                      fsc-p nil slot-name index)))
382         (set-val 'accessor-flags 7)
383         (let ((table (or (gethash slot-name *name->class->slotd-table*)
384                          (setf (gethash slot-name *name->class->slotd-table*)
385                                (make-hash-table :test 'eq :size 5)))))
386           (setf (gethash class table) slotd)))
387       (when (and (eq name 'standard-class)
388                  (eq slot-name 'slots) effective-p)
389         (setq *the-eslotd-standard-class-slots* slotd))
390       (when (and (eq name 'funcallable-standard-class)
391                  (eq slot-name 'slots) effective-p)
392         (setq *the-eslotd-funcallable-standard-class-slots* slotd))
393       slotd)))
394
395 (defun !bootstrap-accessor-definitions (early-p)
396   (let ((*early-p* early-p))
397     (dolist (definition *early-class-definitions*)
398       (let ((name (ecd-class-name definition))
399             (meta (ecd-metaclass definition)))
400         (unless (eq meta 'built-in-class)
401           (let ((direct-slots  (ecd-canonical-slots definition)))
402             (dolist (slotd direct-slots)
403               (let ((slot-name (getf slotd :name))
404                     (readers (getf slotd :readers))
405                     (writers (getf slotd :writers)))
406                 (!bootstrap-accessor-definitions1
407                  name
408                  slot-name
409                  readers
410                  writers
411                  nil)
412                 (!bootstrap-accessor-definitions1
413                  'slot-object
414                  slot-name
415                  (list (slot-reader-name slot-name))
416                  (list (slot-writer-name slot-name))
417                  (list (slot-boundp-name slot-name)))))))))))
418
419 (defun !bootstrap-accessor-definition (class-name accessor-name slot-name type)
420   (multiple-value-bind (accessor-class make-method-function arglist specls doc)
421       (ecase type
422         (reader (values 'standard-reader-method
423                         #'make-std-reader-method-function
424                         (list class-name)
425                         (list class-name)
426                         "automatically generated reader method"))
427         (writer (values 'standard-writer-method
428                         #'make-std-writer-method-function
429                         (list 'new-value class-name)
430                         (list t class-name)
431                         "automatically generated writer method"))
432         (boundp (values 'standard-boundp-method
433                         #'make-std-boundp-method-function
434                         (list class-name)
435                         (list class-name)
436                         "automatically generated boundp method")))
437     (let ((gf (ensure-generic-function accessor-name
438                                        :lambda-list arglist)))
439       (if (find specls (early-gf-methods gf)
440                 :key #'early-method-specializers
441                 :test 'equal)
442           (unless (assoc accessor-name *!generic-function-fixups*
443                          :test #'equal)
444             (update-dfun gf))
445           (add-method gf
446                       (make-a-method accessor-class
447                                      ()
448                                      arglist specls
449                                      (funcall make-method-function
450                                               class-name slot-name)
451                                      doc
452                                      slot-name))))))
453
454 (defun !bootstrap-accessor-definitions1 (class-name
455                                         slot-name
456                                         readers
457                                         writers
458                                         boundps)
459   (flet ((do-reader-definition (reader)
460            (!bootstrap-accessor-definition class-name
461                                            reader
462                                            slot-name
463                                            'reader))
464          (do-writer-definition (writer)
465            (!bootstrap-accessor-definition class-name
466                                            writer
467                                            slot-name
468                                            'writer))
469          (do-boundp-definition (boundp)
470            (!bootstrap-accessor-definition class-name
471                                            boundp
472                                            slot-name
473                                            'boundp)))
474     (dolist (reader readers) (do-reader-definition reader))
475     (dolist (writer writers) (do-writer-definition writer))
476     (dolist (boundp boundps) (do-boundp-definition boundp))))
477
478 (defun !bootstrap-class-predicates (early-p)
479   (let ((*early-p* early-p))
480     (dolist (definition *early-class-definitions*)
481       (let* ((name (ecd-class-name definition))
482              (class (find-class name)))
483         (setf (find-class-predicate name)
484               (make-class-predicate class (class-predicate-name class)))))))
485
486 (defun !bootstrap-built-in-classes ()
487
488   ;; First make sure that all the supers listed in
489   ;; *BUILT-IN-CLASS-LATTICE* are themselves defined by
490   ;; *BUILT-IN-CLASS-LATTICE*. This is just to check for typos and
491   ;; other sorts of brainos.
492   (dolist (e *built-in-classes*)
493     (dolist (super (cadr e))
494       (unless (or (eq super t)
495                   (assq super *built-in-classes*))
496         (error "in *BUILT-IN-CLASSES*: ~S has ~S as a super,~%~
497                 but ~S is not itself a class in *BUILT-IN-CLASSES*."
498                (car e) super super))))
499
500   ;; In the first pass, we create a skeletal object to be bound to the
501   ;; class name.
502   (let* ((built-in-class (find-class 'built-in-class))
503          (built-in-class-wrapper (class-wrapper built-in-class)))
504     (dolist (e *built-in-classes*)
505       (let ((class (allocate-standard-instance built-in-class-wrapper)))
506         (setf (find-class (car e)) class))))
507
508   ;; In the second pass, we initialize the class objects.
509   (let ((class-eq-wrapper (class-wrapper (find-class 'class-eq-specializer))))
510     (dolist (e *built-in-classes*)
511       (destructuring-bind (name supers subs cpl prototype) e
512         (let* ((class (find-class name))
513                (lclass (find-classoid name))
514                (wrapper (classoid-layout lclass)))
515           (set (get-built-in-class-symbol name) class)
516           (set (get-built-in-wrapper-symbol name) wrapper)
517           (setf (classoid-pcl-class lclass) class)
518
519           (!bootstrap-initialize-class 'built-in-class class
520                                        name class-eq-wrapper nil
521                                        supers subs
522                                        (cons name cpl)
523                                        wrapper prototype)))))
524
525   (dolist (e *built-in-classes*)
526     (let* ((name (car e))
527            (class (find-class name)))
528       (setf (find-class-predicate name)
529             (make-class-predicate class (class-predicate-name class))))))
530 \f
531 (defmacro wrapper-of-macro (x)
532   `(layout-of ,x))
533
534 (defun class-of (x)
535   (wrapper-class* (wrapper-of-macro x)))
536
537 ;;; FIXME: We probably don't need both WRAPPER-OF and WRAPPER-OF-MACRO.
538 #-sb-fluid (declaim (inline wrapper-of))
539 (defun wrapper-of (x)
540   (wrapper-of-macro x))
541
542 (defun eval-form (form)
543   (lambda () (eval form)))
544
545 (defun ensure-non-standard-class (name &optional existing-class)
546   (flet
547       ((ensure (metaclass &optional (slots nil slotsp))
548          (let ((supers
549                 (mapcar #'classoid-name (classoid-direct-superclasses
550                                          (find-classoid name)))))
551            (if slotsp
552                (ensure-class-using-class existing-class name
553                                          :metaclass metaclass :name name
554                                          :direct-superclasses supers
555                                          :direct-slots slots)
556                (ensure-class-using-class existing-class name
557                                          :metaclass metaclass :name name
558                                          :direct-superclasses supers))))
559        (slot-initargs-from-structure-slotd (slotd)
560          (let ((accessor (structure-slotd-accessor-symbol slotd)))
561            `(:name ,(structure-slotd-name slotd)
562              :defstruct-accessor-symbol ,accessor
563              ,@(when (fboundp accessor)
564                  `(:internal-reader-function
565                    ,(structure-slotd-reader-function slotd)
566                    :internal-writer-function
567                    ,(structure-slotd-writer-function name slotd)))
568              :type ,(or (structure-slotd-type slotd) t)
569              :initform ,(structure-slotd-init-form slotd)
570              :initfunction ,(eval-form (structure-slotd-init-form slotd)))))
571        (slot-initargs-from-condition-slot (slot)
572          `(:name ,(condition-slot-name slot)
573            :initargs ,(condition-slot-initargs slot)
574            :readers ,(condition-slot-readers slot)
575            :writers ,(condition-slot-writers slot)
576            ,@(when (condition-slot-initform-p slot)
577                (let ((form-or-fun (condition-slot-initform slot)))
578                  (if (functionp form-or-fun)
579                      `(:initfunction ,form-or-fun)
580                      `(:initform ,form-or-fun
581                        :initfunction ,(lambda () form-or-fun)))))
582            :allocation ,(condition-slot-allocation slot)
583            :documentation ,(condition-slot-documentation slot))))
584     (cond ((structure-type-p name)
585            (ensure 'structure-class
586                    (mapcar #'slot-initargs-from-structure-slotd
587                            (structure-type-slot-description-list name))))
588           ((condition-type-p name)
589            (ensure 'condition-class
590                    (mapcar #'slot-initargs-from-condition-slot
591                            (condition-classoid-slots (find-classoid name)))))
592           (t
593            (error "~@<~S is not the name of a class.~@:>" name)))))
594
595 (defun ensure-defstruct-class (classoid)
596   (let ((class (classoid-pcl-class classoid)))
597     (cond (class
598            (ensure-non-standard-class (class-name class) class))
599           ((eq 'complete *boot-state*) 
600            (ensure-non-standard-class (classoid-name classoid))))))
601
602 (pushnew 'ensure-defstruct-class sb-kernel::*defstruct-hooks*)
603 \f
604 (defun make-class-predicate (class name)
605   (let* ((gf (ensure-generic-function name :lambda-list '(object)))
606          (mlist (if (eq *boot-state* 'complete)
607                     (generic-function-methods gf)
608                     (early-gf-methods gf))))
609     (unless mlist
610       (unless (eq class *the-class-t*)
611         (let* ((default-method-function #'constantly-nil)
612                (default-method-initargs (list :function
613                                               default-method-function))
614                (default-method (make-a-method
615                                 'standard-method
616                                 ()
617                                 (list 'object)
618                                 (list *the-class-t*)
619                                 default-method-initargs
620                                 "class predicate default method")))
621           (setf (method-function-get default-method-function :constant-value)
622                 nil)
623           (add-method gf default-method)))
624       (let* ((class-method-function #'constantly-t)
625              (class-method-initargs (list :function
626                                           class-method-function))
627              (class-method (make-a-method 'standard-method
628                                           ()
629                                           (list 'object)
630                                           (list class)
631                                           class-method-initargs
632                                           "class predicate class method")))
633         (setf (method-function-get class-method-function :constant-value) t)
634         (add-method gf class-method)))
635     gf))
636
637 ;;; Set the inherits from CPL, and register the layout. This actually
638 ;;; installs the class in the Lisp type system.
639 (defun update-lisp-class-layout (class layout)
640   (let ((lclass (layout-classoid layout)))
641     (unless (eq (classoid-layout lclass) layout)
642       (setf (layout-inherits layout)
643               (order-layout-inherits
644                (map 'simple-vector #'class-wrapper
645                     (reverse (rest (class-precedence-list class))))))
646       (register-layout layout :invalidate t)
647
648       ;; Subclasses of formerly forward-referenced-class may be
649       ;; unknown to CL:FIND-CLASS and also anonymous. This
650       ;; functionality moved here from (SETF FIND-CLASS).
651       (let ((name (class-name class)))
652         (setf (find-classoid name) lclass
653               (classoid-name lclass) name)))))
654
655 (defun set-class-type-translation (class name)
656   (let ((classoid (find-classoid name nil)))
657     (etypecase classoid
658       (null)
659       (built-in-classoid
660        (let ((translation (built-in-classoid-translation classoid)))
661          (cond
662            (translation
663             (aver (ctype-p translation))
664             (setf (info :type :translator class)
665                   (lambda (spec) (declare (ignore spec)) translation)))
666            (t
667             (setf (info :type :translator class)
668                   (lambda (spec) (declare (ignore spec)) classoid))))))
669       (classoid
670        (setf (info :type :translator class)
671              (lambda (spec) (declare (ignore spec)) classoid))))))
672
673 (clrhash *find-class*)
674 (!bootstrap-meta-braid)
675 (!bootstrap-accessor-definitions t)
676 (!bootstrap-class-predicates t)
677 (!bootstrap-accessor-definitions nil)
678 (!bootstrap-class-predicates nil)
679 (!bootstrap-built-in-classes)
680
681 (dohash (name x *find-class*)
682         (let* ((class (find-class-from-cell name x))
683                (layout (class-wrapper class))
684                (lclass (layout-classoid layout))
685                (lclass-pcl-class (classoid-pcl-class lclass))
686                (olclass (find-classoid name nil)))
687           (if lclass-pcl-class
688               (aver (eq class lclass-pcl-class))
689               (setf (classoid-pcl-class lclass) class))
690
691           (update-lisp-class-layout class layout)
692
693           (cond (olclass
694                  (aver (eq lclass olclass)))
695                 (t
696                  (setf (find-classoid name) lclass)))
697
698           (set-class-type-translation class name)))
699
700 (setq *boot-state* 'braid)
701
702 (defmethod no-applicable-method (generic-function &rest args)
703   (error "~@<There is no applicable method for the generic function ~2I~_~S~
704           ~I~_when called with arguments ~2I~_~S.~:>"
705          generic-function
706          args))
707
708 (defmethod no-next-method ((generic-function standard-generic-function)
709                            (method standard-method) &rest args)
710   (error "~@<There is no next method for the generic function ~2I~_~S~
711           ~I~_when called from method ~2I~_~S~I~_with arguments ~2I~_~S.~:>"
712          generic-function
713          method
714          args))
715
716 ;;; An extension to the ANSI standard: in the presence of e.g. a
717 ;;; :BEFORE method, it would seem that going through
718 ;;; NO-APPLICABLE-METHOD is prohibited, as in fact there is an
719 ;;; applicable method.  -- CSR, 2002-11-15
720 (defmethod no-primary-method (generic-function &rest args)
721   (error "~@<There is no primary method for the generic function ~2I~_~S~
722           ~I~_when called with arguments ~2I~_~S.~:>"
723          generic-function
724          args))
725
726 (defmethod invalid-qualifiers ((gf generic-function)
727                                combin
728                                method)
729   (let ((qualifiers (method-qualifiers method)))
730     (let ((why (cond
731                  ((cdr qualifiers) "has too many qualifiers")
732                  (t (aver (not (member (car qualifiers)
733                                        '(:around :before :after))))
734                     "has an invalid qualifier"))))
735       (invalid-method-error
736        method
737        "The method ~S on ~S ~A.~%~
738         Standard method combination requires all methods to have one~%~
739         of the single qualifiers :AROUND, :BEFORE and :AFTER or to~%~
740         have no qualifier at all."
741        method gf why))))