tests/mop.impure.lisp

   1 ;;;; miscellaneous side-effectful tests of the MOP
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; While most of SBCL is derived from the CMU CL system, the test
   7 ;;;; files (like this one) were written from scratch after the fork
   8 ;;;; from CMU CL.
   9 ;;;;
  10 ;;;; This software is in the public domain and is provided with
  11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  12 ;;;; more information.
  13
  14 ;;;; Note that the MOP is not in an entirely supported state.
  15 ;;;; However, this seems a good a way as any of ensuring that we have
  16 ;;;; no regressions.
  17
  18 (defpackage "MOP-TEST"
  19   (:use "CL" "SB-MOP" "ASSERTOID"))
  20
  21 (in-package "MOP-TEST")
  22 \f
  23 ;;; Readers for Class Metaobjects (pp. 212--214 of AMOP)
  24 (defclass red-herring (forward-ref) ())
  25
  26 (assert (null (class-direct-slots (find-class 'forward-ref))))
  27 (assert (null (class-direct-default-initargs
  28                (find-class 'forward-ref))))
  29 \f
  30 ;;; Readers for Generic Function Metaobjects (pp. 216--218 of AMOP)
  31 (defgeneric fn-with-odd-arg-precedence (a b c)
  32   (:argument-precedence-order b c a))
  33
  34 (assert (equal
  35          (generic-function-lambda-list #'fn-with-odd-arg-precedence)
  36          '(a b c)))
  37 (assert (equal
  38          (generic-function-argument-precedence-order #'fn-with-odd-arg-precedence)
  39          '(b c a)))
  40 ;;; Test for DOCUMENTATION's order, which was wrong until sbcl-0.7.8.39
  41 (assert (equal
  42          (generic-function-argument-precedence-order #'documentation)
  43          (let ((ll (generic-function-lambda-list #'documentation)))
  44            (list (nth 1 ll) (nth 0 ll)))))
  45
  46 (assert (null
  47          (generic-function-declarations #'fn-with-odd-arg-precedence)))
  48 (defgeneric gf-with-declarations (x)
  49   (declare (optimize (speed 3)))
  50   (declare (optimize (safety 0))))
  51 (let ((decls (generic-function-declarations #'gf-with-declarations)))
  52   (assert (= (length decls) 2))
  53   (assert (member '(optimize (speed 3)) decls :test #'equal))
  54   (assert (member '(optimize (safety 0)) decls :test #'equal)))
  55 \f
  56 ;;; Readers for Slot Definition Metaobjects (pp. 221--224 of AMOP)
  57
  58 ;;; Ensure that SLOT-DEFINITION-ALLOCATION returns :INSTANCE/:CLASS as
  59 ;;; appropriate.
  60 (defclass sdm-test-class ()
  61   ((an-instance-slot :accessor an-instance-slot)
  62    (a-class-slot :allocation :class :accessor a-class-slot)))
  63 (dolist (m (list (list #'an-instance-slot :instance)
  64                  (list #'a-class-slot :class)))
  65   (let ((methods (generic-function-methods (car m))))
  66     (assert (= (length methods) 1))
  67     (assert (eq (slot-definition-allocation
  68                  (accessor-method-slot-definition
  69                   (car methods)))
  70                 (cadr m)))))
  71 \f
  72 ;;; Class Finalization Protocol (see section 5.5.2 of AMOP)
  73 (let ((finalized-count 0))
  74   (defmethod finalize-inheritance :after ((x standard-class))
  75     (incf finalized-count))
  76   (defun get-count () finalized-count))
  77 (defclass finalization-test-1 () ())
  78 (make-instance 'finalization-test-1)
  79 (assert (= (get-count) 1))
  80 (defclass finalization-test-2 (finalization-test-3) ())
  81 (assert (= (get-count) 1))
  82 (defclass finalization-test-3 () ())
  83 (make-instance 'finalization-test-3)
  84 (assert (or (= (get-count) 2) (= (get-count) 3)))
  85 (make-instance 'finalization-test-2)
  86 (assert (= (get-count) 3))
  87 \f
  88 ;;; Bits of FUNCALLABLE-STANDARD-CLASS are easy to break; make sure
  89 ;;; that it is at least possible to define classes with that as a
  90 ;;; metaclass.
  91 (defclass gf-class (standard-generic-function) ()
  92   (:metaclass funcallable-standard-class))
  93 (defgeneric g (a b c)
  94   (:generic-function-class gf-class))
  95 \f
  96 ;;; until sbcl-0.7.12.47, PCL wasn't aware of some direct class
  97 ;;; relationships.  These aren't necessarily true, but are probably
  98 ;;; not going to change often.
  99 (dolist (x '(number array sequence character symbol))
 100   (assert (eq (car (class-direct-superclasses (find-class x)))
 101               (find-class t)))
 102   (assert (member (find-class x)
 103                   (class-direct-subclasses (find-class t)))))
 104 \f
 105 ;;; the class-prototype of the NULL class used to be some weird
 106 ;;; standard-instance-like thing.  Make sure it's actually NIL.
 107 ;;;
 108 ;;; (and FIXME: eventually turn this into asserting that the prototype
 109 ;;; of all built-in-classes is of the relevant type)
 110 (assert (null (class-prototype (find-class 'null))))
 111 \f
 112 ;;; simple consistency checks for the SB-MOP package: all of the
 113 ;;; functionality specified in AMOP is in functions and classes:
 114 (assert (null (loop for x being each external-symbol in "SB-MOP"
 115                     unless (or (fboundp x) (find-class x)) collect x)))
 116 ;;; and all generic functions in SB-MOP have at least one specified
 117 ;;; method, except for UPDATE-DEPENDENT
 118 (assert (null (loop for x being each external-symbol in "SB-MOP"
 119                     unless (or (not (fboundp x))
 120                                (eq x 'update-dependent)
 121                                (not (typep (fdefinition x) 'generic-function))
 122                                (> (length (generic-function-methods
 123                                            (fdefinition x)))
 124                                   0))
 125                     collect x)))
 126 \f
 127 ;;; make sure that ENSURE-CLASS-USING-CLASS's arguments are the right
 128 ;;; way round (!)
 129 (defvar *e-c-u-c-arg-order* nil)
 130 (defmethod ensure-class-using-class :after
 131     (class (name (eql 'e-c-u-c-arg-order)) &key &allow-other-keys)
 132   (setf *e-c-u-c-arg-order* t))
 133 (defclass e-c-u-c-arg-orderoid () ())
 134 (assert (null *e-c-u-c-arg-order*))
 135 (defclass e-c-u-c-arg-order () ())
 136 (assert (eq *e-c-u-c-arg-order* t))
 137 \f
 138 ;;; verify that FIND-CLASS works after FINALIZE-INHERITANCE
 139 (defclass automethod-class (standard-class) ())
 140 (defmethod validate-superclass ((c1 automethod-class) (c2 standard-class))
 141   t)
 142 (defmethod finalize-inheritance :after ((x automethod-class))
 143   (format t "~&~S ~S~%" x (find-class (class-name x))))
 144 (defclass automethod-object () ()
 145   (:metaclass automethod-class))
 146 (defvar *automethod-object* (make-instance 'automethod-object))
 147 (assert (typep *automethod-object* 'automethod-object))
 148 \f
 149 ;;; COMPUTE-EFFECTIVE-SLOT-DEFINITION should take three arguments, one
 150 ;;; of which is the name of the slot.
 151 (defvar *compute-effective-slot-definition-count* 0)
 152 (defmethod compute-effective-slot-definition :before
 153     (class (name (eql 'foo)) dsds)
 154   (incf *compute-effective-slot-definition-count*))
 155 (defclass cesd-test-class ()
 156   ((foo :initarg :foo)))
 157 (make-instance 'cesd-test-class :foo 3)
 158 ;;; FIXME: this assertion seems a little weak.  I don't know why
 159 ;;; COMPUTE-EFFECTIVE-SLOT-DEFINITION gets called twice in this
 160 ;;; sequence, nor whether that's compliant with AMOP.  -- CSR,
 161 ;;; 2003-04-17
 162 (assert (> *compute-effective-slot-definition-count* 0))
 163 \f
 164 ;;; this used to cause a nasty uncaught metacircularity in PCL.
 165 (defclass substandard-method (standard-method) ())
 166 (defgeneric substandard-defgeneric (x y)
 167   (:method-class substandard-method)
 168   (:method ((x number) (y number)) (+ x y))
 169   (:method ((x string) (y string)) (concatenate 'string x y)))
 170 (assert (= (substandard-defgeneric 1 2) 3))
 171 (assert (string= (substandard-defgeneric "1" "2") "12"))
 172 \f
 173 (let* ((x (find-class 'pathname))
 174        (xs (class-direct-subclasses x)))
 175   (assert (>= (length xs) 1))
 176   (assert (member (find-class 'logical-pathname) xs)))
 177
 178 ;;; BUG 338: "MOP specializers as type specifiers"
 179 ;;;  (reported by Bruno Haible sbcl-devel 2004-06-11)
 180 (let* ((m (defmethod eql-specialized-method ((x (eql 4.0))) 3.0))
 181        (spec (first (sb-mop:method-specializers m))))
 182   (assert (not (typep 1 spec)))
 183   (assert (typep 4.0 spec)))
 184 \f
 185 ;;; BUG #334, relating to programmatic addition of slots to a class
 186 ;;; with COMPUTE-SLOTS.
 187 ;;;
 188 ;;; FIXME: the DUMMY classes here are to prevent class finalization
 189 ;;; before the compute-slots method is around.  This should probably
 190 ;;; be done by defining the COMPUTE-SLOTS methods on a metaclass,
 191 ;;; which can be defined before.
 192 ;;;
 193 ;;; a. adding an :allocation :instance slot
 194 (defclass class-to-add-instance-slot (dummy-ctais) ())
 195 (defmethod compute-slots ((c (eql (find-class 'class-to-add-instance-slot))))
 196   (append (call-next-method)
 197           (list (make-instance 'standard-effective-slot-definition
 198                                :name 'y
 199                                :allocation :instance))))
 200 (defclass dummy-ctais () ((x :allocation :class)))
 201 (finalize-inheritance (find-class 'class-to-add-instance-slot))
 202 (assert (equal (mapcar #'slot-definition-allocation
 203                        (class-slots (find-class 'class-to-add-instance-slot)))
 204                ;; FIXME: is the order really guaranteed?
 205                '(:class :instance)))
 206 (assert (typep (slot-definition-location
 207                 (cadr (class-slots (find-class 'class-to-add-instance-slot))))
 208                'unsigned-byte))
 209 #| (assert (typep (slot-definition-location (car ...)) '???)) |#
 210 (let ((x (make-instance 'class-to-add-instance-slot)))
 211   (assert (not (slot-boundp x 'x)))
 212   (setf (slot-value x 'x) t)
 213   (assert (not (slot-boundp x 'y)))
 214   (setf (slot-value x 'y) 1)
 215   (assert (= 1 (slot-value x 'y))))
 216 (let ((x (make-instance 'class-to-add-instance-slot)))
 217   (assert (slot-boundp x 'x))
 218   (assert (eq t (slot-value x 'x)))
 219   (assert (not (slot-boundp x 'y))))
 220
 221 ;;; b. adding an :allocation :class slot
 222 (defclass class-to-add-class-slot (dummy-ctacs) ())
 223 (defmethod compute-slots ((c (eql (find-class 'class-to-add-class-slot))))
 224   (append (call-next-method)
 225           (list (make-instance 'standard-effective-slot-definition
 226                                :name 'y
 227                                :allocation :class))))
 228 (defclass dummy-ctacs () ((x :allocation :class)))
 229 (finalize-inheritance (find-class 'class-to-add-class-slot))
 230 (assert (equal (mapcar #'slot-definition-allocation
 231                        (class-slots (find-class 'class-to-add-class-slot)))
 232                '(:class :class)))
 233 (let ((x (make-instance 'class-to-add-class-slot)))
 234   (assert (not (slot-boundp x 'x)))
 235   (setf (slot-value x 'x) nil)
 236   (assert (not (slot-boundp x 'y)))
 237   (setf (slot-value x 'y) 1)
 238   (assert (= 1 (slot-value x 'y))))
 239 (let ((x (make-instance 'class-to-add-class-slot)))
 240   (assert (slot-boundp x 'x))
 241   (assert (eq nil (slot-value x 'x)))
 242   (assert (slot-boundp x 'y))
 243   (assert (= 1 (slot-value x 'y))))
 244 ;;; extra paranoia: check that we haven't broken the instance-slot class
 245 (let ((x (make-instance 'class-to-add-instance-slot)))
 246   (assert (slot-boundp x 'x))
 247   (assert (eq t (slot-value x 'x)))
 248   (assert (not (slot-boundp x 'y))))
 249 \f
 250 ;;;; the CTOR optimization was insufficiently careful about its
 251 ;;;; assumptions: firstly, it failed with a failed AVER for
 252 ;;;; non-standard-allocation slots:
 253 (defclass class-with-frob-slot ()
 254   ((frob-slot :initarg :frob-slot :allocation :frob)))
 255 (handler-case
 256     (funcall (compile nil '(lambda ()
 257                             (make-instance 'class-with-frob-slot
 258                              :frob-slot 1))))
 259   (sb-int:bug (c) (error c))
 260   (error () "Probably OK: haven't implemented SLOT-BOUNDP-USING-CLASS"))
 261 ;;; secondly, it failed to take account of the fact that we might wish
 262 ;;; to customize (setf slot-value-using-class)
 263 (defclass class-with-special-ssvuc ()
 264   ((some-slot :initarg :some-slot)))
 265 (defvar *special-ssvuc-counter* 0)
 266 (defmethod (setf slot-value-using-class) :before
 267     (new-value class (instance class-with-special-ssvuc) slotd)
 268   (incf *special-ssvuc-counter*))
 269 (let ((fun (compile nil '(lambda () (make-instance 'class-with-special-ssvuc
 270                                      :some-slot 1)))))
 271   (assert (= *special-ssvuc-counter* 0))
 272   (funcall fun)
 273   (assert (= *special-ssvuc-counter* 1))
 274   (funcall fun)
 275   (assert (= *special-ssvuc-counter* 2)))
 276 ;;; and now with the customization after running the function once
 277 (defclass class-with-special-ssvuc-2 ()
 278   ((some-slot :initarg :some-slot)))
 279 (defvar *special-ssvuc-counter-2* 0)
 280 (let ((fun (compile nil '(lambda () (make-instance 'class-with-special-ssvuc-2
 281                                      :some-slot 1)))))
 282   (assert (= *special-ssvuc-counter-2* 0))
 283   (funcall fun)
 284   (assert (= *special-ssvuc-counter-2* 0))
 285   (defmethod (setf slot-value-using-class) :before
 286       (new-value class (instance class-with-special-ssvuc-2) slotd)
 287     (incf *special-ssvuc-counter-2*))
 288   (funcall fun)
 289   (assert (= *special-ssvuc-counter-2* 1)))
 290 \f
 291 ;;; vicious metacycle detection and resolution wasn't good enough: it
 292 ;;; didn't take account that the slots (and hence the slot readers)
 293 ;;; might be inherited from superclasses.  This example, due to Bruno
 294 ;;; Haible, also tests programmatic addition of accessors.
 295 (defclass auto-accessors-direct-slot-definition-class (standard-class)
 296   ((containing-class-name :initarg :containing-class-name)))
 297 (defmethod validate-superclass
 298     ((c1 auto-accessors-direct-slot-definition-class) (c2 standard-class))
 299   t)
 300 (defclass auto-accessors-class (standard-class)
 301   ())
 302 (defmethod direct-slot-definition-class ((class auto-accessors-class)
 303                                          &rest initargs)
 304   (let ((dsd-class-name (gensym)))
 305     (sb-pcl:ensure-class
 306      dsd-class-name
 307      :metaclass 'auto-accessors-direct-slot-definition-class
 308      :direct-superclasses (list (find-class 'standard-direct-slot-definition))
 309      :containing-class-name (class-name class))
 310     (eval `(defmethod initialize-instance :after ((dsd ,dsd-class-name)
 311                                                   &rest args)
 312             (when (and (null (slot-definition-readers dsd))
 313                        (null (slot-definition-writers dsd)))
 314               (let* ((containing-class-name
 315                       (slot-value (class-of dsd) 'containing-class-name))
 316                      (accessor-name
 317                       (intern
 318                        (concatenate 'string
 319                                     (symbol-name containing-class-name)
 320                                     "-"
 321                                     (symbol-name (slot-definition-name dsd)))
 322                        (symbol-package containing-class-name))))
 323                 (setf (slot-definition-readers dsd) (list accessor-name))
 324                 (setf (slot-definition-writers dsd)
 325                       (list (list 'setf accessor-name)))))))
 326     (find-class dsd-class-name)))
 327 (defmethod validate-superclass ((c1 auto-accessors-class) (c2 standard-class))
 328   t)
 329 (defclass testclass15 ()
 330   ((x :initarg :x) (y))
 331   (:metaclass auto-accessors-class))
 332 (let ((inst (make-instance 'testclass15 :x 12)))
 333   (assert (equal (list (testclass15-x inst) (setf (testclass15-y inst) 13))
 334                  '(12 13))))
 335
 336 ;;; bug reported by Bruno Haible on sbcl-devel 2004-11-17: incorrect
 337 ;;; handling of multiple values for non-standard slot-options
 338 (progn
 339   (defclass option-slot-definition (sb-mop:standard-direct-slot-definition)
 340     ((option :accessor sl-option :initarg :my-option)))
 341   (defclass option-slot-class (standard-class)
 342     ())
 343   (defmethod sb-mop:direct-slot-definition-class
 344       ((c option-slot-class) &rest args)
 345     (declare (ignore args))
 346     (find-class 'option-slot-definition))
 347   (defmethod sb-mop:validate-superclass
 348       ((c1 option-slot-class) (c2 standard-class))
 349     t)
 350   (eval '(defclass test-multiple-slot-option-bug ()
 351           ((x :my-option bar :my-option baz))
 352           (:metaclass option-slot-class)))
 353   (assert (null (set-difference
 354                  '(bar baz)
 355                  (sl-option (first (sb-mop:class-direct-slots
 356                                     (find-class 'test-multiple-slot-option-bug))))))))
 357
 358 ;;; bug reported by Bruno Haibel on sbcl-devel 2004-11-19: AMOP requires
 359 ;;; that CLASS-PROTOYPE signals an error if the class is not yet finalized
 360 (defclass prototype-not-finalized-sub (prototype-not-finalized-super) ())
 361 (multiple-value-bind (val err)
 362     (ignore-errors (sb-mop:class-prototype (find-class 'prototype-not-finalized-super)))
 363   (assert (null val))
 364   (assert (typep err 'error)))
 365
 366 ;;; AMOP says so
 367 (find-method (fdefinition 'sb-mop:allocate-instance) () '(built-in-class))
 368 (dolist (class-name '(fixnum bignum symbol))
 369   (let ((class (find-class class-name)))
 370     (multiple-value-bind (value error) (ignore-errors (allocate-instance class))
 371       (assert (null value))
 372       (assert (typep error 'error)))))
 373
 374 ;;; bug reported by David Morse: direct-subclass update protocol was broken
 375 (defclass vegetable () ())
 376 (defclass tomato (vegetable) ())
 377 (assert (equal (list (find-class 'tomato)) (sb-mop:class-direct-subclasses (find-class 'vegetable))))
 378 (defclass tomato () ())
 379 (assert (null (sb-mop:class-direct-subclasses (find-class 'vegetable))))
 380
 381 ;;; bug 331: lazy creation of clos classes for defstructs
 382 (defstruct bug-331-super)
 383 (defstruct (bug-331-sub (:include bug-331-super)))
 384 (let ((subs (sb-mop:class-direct-subclasses (find-class 'bug-331-super))))
 385   (assert (= 1 (length subs)))
 386   (assert (eq (car subs) (find-class 'bug-331-sub))))
 387 ;;; (addendum to test for #331: conditions suffered the same problem)
 388 (define-condition condition-bug-331-super () ())
 389 (define-condition condition-bug-331-sub (condition-bug-331-super) ())
 390 (let ((subs (sb-mop:class-direct-subclasses
 391              (find-class 'condition-bug-331-super))))
 392   (assert (= 1 (length subs)))
 393   (assert (eq (car subs) (find-class 'condition-bug-331-sub))))
 394 ;;; (addendum to the addendum: the fix for this revealed breakage in
 395 ;;; REINITIALIZE-INSTANCE)
 396 (define-condition condition-bug-331a () ((slot331a :reader slot331a)))
 397 (reinitialize-instance (find-class 'condition-bug-331a))
 398 (let* ((gf #'slot331a)
 399        (methods (sb-mop:generic-function-methods gf)))
 400   (assert (= (length methods) 1))
 401   (assert (eq (car methods)
 402               (find-method #'slot331a nil
 403                            (list (find-class 'condition-bug-331a))))))
 404
 405 ;;; detection of multiple class options in defclass, reported by Bruno Haible
 406 (defclass option-class (standard-class)
 407   ((option :accessor cl-option :initarg :my-option)))
 408 (defmethod sb-pcl:validate-superclass ((c1 option-class) (c2 standard-class))
 409   t)
 410 (multiple-value-bind (result error)
 411     (ignore-errors (eval '(defclass option-class-instance ()
 412                            ()
 413                            (:my-option bar)
 414                            (:my-option baz)
 415                            (:metaclass option-class))))
 416   (assert (not result))
 417   (assert error))
 418
 419 ;;; class as :metaclass
 420 (assert (typep
 421          (sb-mop:ensure-class-using-class
 422           nil 'class-as-metaclass-test
 423           :metaclass (find-class 'standard-class)
 424           :name 'class-as-metaclass-test
 425           :direct-superclasses (list (find-class 'standard-object)))
 426          'class))
 427 \f
 428 ;;; COMPUTE-DEFAULT-INITARGS protocol mismatch reported by Bruno
 429 ;;; Haible
 430 (defparameter *extra-initarg-value* 'extra)
 431 (defclass custom-default-initargs-class (standard-class)
 432   ())
 433 (defmethod compute-default-initargs ((class custom-default-initargs-class))
 434   (let ((original-default-initargs
 435          (remove-duplicates
 436           (reduce #'append
 437                   (mapcar #'class-direct-default-initargs
 438                           (class-precedence-list class)))
 439           :key #'car
 440           :from-end t)))
 441     (cons (list ':extra '*extra-initarg-value* #'(lambda () *extra-initarg-value*))
 442           (remove ':extra original-default-initargs :key #'car))))
 443 (defmethod validate-superclass ((c1 custom-default-initargs-class)
 444                                 (c2 standard-class))
 445   t)
 446 (defclass extra-initarg ()
 447   ((slot :initarg :extra))
 448   (:metaclass custom-default-initargs-class))
 449 (assert (eq (slot-value (make-instance 'extra-initarg) 'slot) 'extra))
 450 \f
 451 ;;; STANDARD-CLASS valid as a superclass for FUNCALLABLE-STANDARD-CLASS
 452 (defclass standard-class-for-fsc ()
 453   ((scforfsc-slot :initarg :scforfsc-slot :accessor scforfsc-slot)))
 454 (defvar *standard-class-for-fsc*
 455   (make-instance 'standard-class-for-fsc :scforfsc-slot 1))
 456 (defclass fsc-with-standard-class-superclass
 457     (standard-class-for-fsc funcallable-standard-object)
 458   ((fsc-slot :initarg :fsc-slot :accessor fsc-slot))
 459   (:metaclass funcallable-standard-class))
 460 (defvar *fsc/scs*
 461   (make-instance 'fsc-with-standard-class-superclass
 462                  :scforfsc-slot 2
 463                  :fsc-slot 3))
 464 (assert (= (scforfsc-slot *standard-class-for-fsc*) 1))
 465 (assert (= (scforfsc-slot *fsc/scs*) 2))
 466 (assert (= (fsc-slot *fsc/scs*) 3))
 467 (assert (subtypep 'fsc-with-standard-class-superclass 'function))
 468 (assert (not (subtypep 'standard-class-for-fsc 'function)))
 469
 470 ;;; also check that our sanity check for functionness is good
 471 (assert (raises-error?
 472          (progn
 473            (defclass bad-standard-class (funcallable-standard-object)
 474              ()
 475              (:metaclass standard-class))
 476            (make-instance 'bad-standard-class))))
 477 (assert (raises-error?
 478          (progn
 479            (defclass bad-funcallable-standard-class (standard-object)
 480              ()
 481              (:metaclass funcallable-standard-class))
 482            (make-instance 'bad-funcallable-standard-class))))
 483 \f
 484 ;;; we should be able to make classes with silly names
 485 (make-instance 'standard-class :name 3)
 486 (defclass foo () ())
 487 (reinitialize-instance (find-class 'foo) :name '(a b))
 488 \f
 489 ;;; classes (including anonymous ones) and eql-specializers should be
 490 ;;; allowed to be specializers.
 491 (defvar *anonymous-class*
 492   (make-instance 'standard-class
 493                  :direct-superclasses (list (find-class 'standard-object))))
 494 (defvar *object-of-anonymous-class*
 495   (make-instance *anonymous-class*))
 496 (eval `(defmethod method-on-anonymous-class ((obj ,*anonymous-class*)) 41))
 497 (assert (eql (method-on-anonymous-class *object-of-anonymous-class*) 41))
 498 (eval `(defmethod method-on-anonymous-class
 499         ((obj ,(intern-eql-specializer *object-of-anonymous-class*)))
 500         42))
 501 (assert (eql (method-on-anonymous-class *object-of-anonymous-class*) 42))
 502 \f
 503 ;;; accessors can cause early finalization, which caused confusion in
 504 ;;; the system, leading to uncompileable TYPEP problems.
 505 (defclass funcallable-class-for-typep ()
 506   ((some-slot-with-accessor :accessor some-slot-with-accessor))
 507   (:metaclass funcallable-standard-class))
 508 (compile nil '(lambda (x) (typep x 'funcallable-class-for-typep)))
 509 \f
 510 ;;; even anonymous classes should be valid types
 511 (let* ((class1 (make-instance 'standard-class :direct-superclasses (list (find-class 'standard-object))))
 512        (class2 (make-instance 'standard-class :direct-superclasses (list class1))))
 513   (assert (subtypep class2 class1))
 514   (assert (typep (make-instance class2) class1)))
 515 \f
 516 ;;; ensure-class got its treatment of :metaclass wrong.
 517 (ensure-class 'better-be-standard-class :direct-superclasses '(standard-object)
 518               :metaclass 'standard-class
 519               :metaclass 'funcallable-standard-class)
 520 (assert (eq (class-of (find-class 'better-be-standard-class))
 521             (find-class 'standard-class)))
 522 \f
 523 ;;;; success