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 (load "test-util.lisp")
  19
  20 (defpackage "MOP-TEST"
  21   (:use "CL" "SB-MOP" "ASSERTOID" "TEST-UTIL"))
  22
  23 (in-package "MOP-TEST")
  24 \f
  25 ;;; Readers for Class Metaobjects (pp. 212--214 of AMOP)
  26 (defclass red-herring (forward-ref) ())
  27
  28 (assert (null (class-direct-slots (find-class 'forward-ref))))
  29 (assert (null (class-direct-default-initargs
  30                (find-class 'forward-ref))))
  31 \f
  32 ;;; Readers for Generic Function Metaobjects (pp. 216--218 of AMOP)
  33 (defgeneric fn-with-odd-arg-precedence (a b c)
  34   (:argument-precedence-order b c a))
  35
  36 (assert (equal
  37          (generic-function-lambda-list #'fn-with-odd-arg-precedence)
  38          '(a b c)))
  39 (assert (equal
  40          (generic-function-argument-precedence-order #'fn-with-odd-arg-precedence)
  41          '(b c a)))
  42 ;;; Test for DOCUMENTATION's order, which was wrong until sbcl-0.7.8.39
  43 (assert (equal
  44          (generic-function-argument-precedence-order #'documentation)
  45          (let ((ll (generic-function-lambda-list #'documentation)))
  46            (list (nth 1 ll) (nth 0 ll)))))
  47
  48 (assert (null
  49          (generic-function-declarations #'fn-with-odd-arg-precedence)))
  50 (defgeneric gf-with-declarations (x)
  51   (declare (optimize (speed 3)))
  52   (declare (optimize (safety 0))))
  53 (let ((decls (generic-function-declarations #'gf-with-declarations)))
  54   (assert (= (length decls) 2))
  55   (assert (member '(optimize (speed 3)) decls :test #'equal))
  56   (assert (member '(optimize (safety 0)) decls :test #'equal)))
  57 \f
  58 ;;; Readers for Slot Definition Metaobjects (pp. 221--224 of AMOP)
  59
  60 ;;; Ensure that SLOT-DEFINITION-ALLOCATION returns :INSTANCE/:CLASS as
  61 ;;; appropriate.
  62 (defclass sdm-test-class ()
  63   ((an-instance-slot :accessor an-instance-slot)
  64    (a-class-slot :allocation :class :accessor a-class-slot)))
  65 (dolist (m (list (list #'an-instance-slot :instance)
  66                  (list #'a-class-slot :class)))
  67   (let ((methods (generic-function-methods (car m))))
  68     (assert (= (length methods) 1))
  69     (assert (eq (slot-definition-allocation
  70                  (accessor-method-slot-definition
  71                   (car methods)))
  72                 (cadr m)))))
  73 \f
  74 ;;; Class Finalization Protocol (see section 5.5.2 of AMOP)
  75 (let ((finalized-count 0))
  76   (defmethod finalize-inheritance :after ((x standard-class))
  77     (incf finalized-count))
  78   (defun get-count () finalized-count))
  79 (defclass finalization-test-1 () ())
  80 (make-instance 'finalization-test-1)
  81 (assert (= (get-count) 1))
  82 (defclass finalization-test-2 (finalization-test-3) ())
  83 (assert (= (get-count) 1))
  84 (defclass finalization-test-3 () ())
  85 (make-instance 'finalization-test-3)
  86 (assert (or (= (get-count) 2) (= (get-count) 3)))
  87 (make-instance 'finalization-test-2)
  88 (assert (= (get-count) 3))
  89 \f
  90 ;;; Bits of FUNCALLABLE-STANDARD-CLASS are easy to break; make sure
  91 ;;; that it is at least possible to define classes with that as a
  92 ;;; metaclass.
  93 (defclass gf-class (standard-generic-function) ()
  94   (:metaclass funcallable-standard-class))
  95 (defgeneric g (a b c)
  96   (:generic-function-class gf-class))
  97 \f
  98 ;;; until sbcl-0.7.12.47, PCL wasn't aware of some direct class
  99 ;;; relationships.  These aren't necessarily true, but are probably
 100 ;;; not going to change often.
 101 (dolist (x '(number array sequence character symbol))
 102   (assert (eq (car (class-direct-superclasses (find-class x)))
 103               (find-class t)))
 104   (assert (member (find-class x)
 105                   (class-direct-subclasses (find-class t)))))
 106 \f
 107 ;;; the class-prototype of the NULL class used to be some weird
 108 ;;; standard-instance-like thing.  Make sure it's actually NIL.
 109 ;;;
 110 ;;; (and FIXME: eventually turn this into asserting that the prototype
 111 ;;; of all built-in-classes is of the relevant type)
 112 (assert (null (class-prototype (find-class 'null))))
 113 \f
 114 ;;; simple consistency checks for the SB-MOP package: all of the
 115 ;;; functionality specified in AMOP is in functions and classes:
 116 (assert (null (loop for x being each external-symbol in "SB-MOP"
 117                     unless (or (fboundp x) (find-class x)) collect x)))
 118 ;;; and all generic functions in SB-MOP have at least one specified
 119 ;;; method, except for UPDATE-DEPENDENT
 120 (assert (null (loop for x being each external-symbol in "SB-MOP"
 121                     unless (or (not (fboundp x))
 122                                (eq x 'update-dependent)
 123                                (not (typep (fdefinition x) 'generic-function))
 124                                (> (length (generic-function-methods
 125                                            (fdefinition x)))
 126                                   0))
 127                     collect x)))
 128 \f
 129 ;;; make sure that ENSURE-CLASS-USING-CLASS's arguments are the right
 130 ;;; way round (!)
 131 (defvar *e-c-u-c-arg-order* nil)
 132 (defmethod ensure-class-using-class :after
 133     (class (name (eql 'e-c-u-c-arg-order)) &key &allow-other-keys)
 134   (setf *e-c-u-c-arg-order* t))
 135 (defclass e-c-u-c-arg-orderoid () ())
 136 (assert (null *e-c-u-c-arg-order*))
 137 (defclass e-c-u-c-arg-order () ())
 138 (assert (eq *e-c-u-c-arg-order* t))
 139 \f
 140 ;;; verify that FIND-CLASS works after FINALIZE-INHERITANCE
 141 (defclass automethod-class (standard-class) ())
 142 (defmethod validate-superclass ((c1 automethod-class) (c2 standard-class))
 143   t)
 144 (defmethod finalize-inheritance :after ((x automethod-class))
 145   (format t "~&~S ~S~%" x (find-class (class-name x))))
 146 (defclass automethod-object () ()
 147   (:metaclass automethod-class))
 148 (defvar *automethod-object* (make-instance 'automethod-object))
 149 (assert (typep *automethod-object* 'automethod-object))
 150 \f
 151 ;;; COMPUTE-EFFECTIVE-SLOT-DEFINITION should take three arguments, one
 152 ;;; of which is the name of the slot.
 153 (defvar *compute-effective-slot-definition-count* 0)
 154 (defmethod compute-effective-slot-definition :before
 155     (class (name (eql 'foo)) dsds)
 156   (incf *compute-effective-slot-definition-count*))
 157 (defclass cesd-test-class ()
 158   ((foo :initarg :foo)))
 159 (make-instance 'cesd-test-class :foo 3)
 160 ;;; FIXME: this assertion seems a little weak.  I don't know why
 161 ;;; COMPUTE-EFFECTIVE-SLOT-DEFINITION gets called twice in this
 162 ;;; sequence, nor whether that's compliant with AMOP.  -- CSR,
 163 ;;; 2003-04-17
 164 (assert (> *compute-effective-slot-definition-count* 0))
 165 \f
 166 ;;; this used to cause a nasty uncaught metacircularity in PCL.
 167 (defclass substandard-method (standard-method) ())
 168 (defgeneric substandard-defgeneric (x y)
 169   (:method-class substandard-method)
 170   (:method ((x number) (y number)) (+ x y))
 171   (:method ((x string) (y string)) (concatenate 'string x y)))
 172 (assert (= (substandard-defgeneric 1 2) 3))
 173 (assert (string= (substandard-defgeneric "1" "2") "12"))
 174 \f
 175 (let* ((x (find-class 'pathname))
 176        (xs (class-direct-subclasses x)))
 177   (assert (>= (length xs) 1))
 178   (assert (member (find-class 'logical-pathname) xs)))
 179
 180 ;;; BUG 338: "MOP specializers as type specifiers"
 181 ;;;  (reported by Bruno Haible sbcl-devel 2004-06-11)
 182 (let* ((m (defmethod eql-specialized-method ((x (eql 4.0))) 3.0))
 183        (spec (first (sb-mop:method-specializers m))))
 184   (assert (not (typep 1 spec)))
 185   (assert (typep 4.0 spec)))
 186 \f
 187 ;;; BUG #334, relating to programmatic addition of slots to a class
 188 ;;; with COMPUTE-SLOTS.
 189 ;;;
 190 ;;; FIXME: the DUMMY classes here are to prevent class finalization
 191 ;;; before the compute-slots method is around.  This should probably
 192 ;;; be done by defining the COMPUTE-SLOTS methods on a metaclass,
 193 ;;; which can be defined before.
 194 ;;;
 195 ;;; a. adding an :allocation :instance slot
 196 (defclass class-to-add-instance-slot (dummy-ctais) ())
 197 (defmethod compute-slots ((c (eql (find-class 'class-to-add-instance-slot))))
 198   (append (call-next-method)
 199           (list (make-instance 'standard-effective-slot-definition
 200                                :name 'y
 201                                :allocation :instance))))
 202 (defclass dummy-ctais () ((x :allocation :class)))
 203 (finalize-inheritance (find-class 'class-to-add-instance-slot))
 204 (assert (equal (mapcar #'slot-definition-allocation
 205                        (class-slots (find-class 'class-to-add-instance-slot)))
 206                ;; FIXME: is the order really guaranteed?
 207                '(:class :instance)))
 208 (assert (typep (slot-definition-location
 209                 (cadr (class-slots (find-class 'class-to-add-instance-slot))))
 210                'unsigned-byte))
 211 #| (assert (typep (slot-definition-location (car ...)) '???)) |#
 212 (let ((x (make-instance 'class-to-add-instance-slot)))
 213   (assert (not (slot-boundp x 'x)))
 214   (setf (slot-value x 'x) t)
 215   (assert (not (slot-boundp x 'y)))
 216   (setf (slot-value x 'y) 1)
 217   (assert (= 1 (slot-value x 'y))))
 218 (let ((x (make-instance 'class-to-add-instance-slot)))
 219   (assert (slot-boundp x 'x))
 220   (assert (eq t (slot-value x 'x)))
 221   (assert (not (slot-boundp x 'y))))
 222
 223 ;;; b. adding an :allocation :class slot
 224 (defclass class-to-add-class-slot (dummy-ctacs) ())
 225 (defmethod compute-slots ((c (eql (find-class 'class-to-add-class-slot))))
 226   (append (call-next-method)
 227           (list (make-instance 'standard-effective-slot-definition
 228                                :name 'y
 229                                :allocation :class))))
 230 (defclass dummy-ctacs () ((x :allocation :class)))
 231 (finalize-inheritance (find-class 'class-to-add-class-slot))
 232 (assert (equal (mapcar #'slot-definition-allocation
 233                        (class-slots (find-class 'class-to-add-class-slot)))
 234                '(:class :class)))
 235 (let ((x (make-instance 'class-to-add-class-slot)))
 236   (assert (not (slot-boundp x 'x)))
 237   (setf (slot-value x 'x) nil)
 238   (assert (not (slot-boundp x 'y)))
 239   (setf (slot-value x 'y) 1)
 240   (assert (= 1 (slot-value x 'y))))
 241 (let ((x (make-instance 'class-to-add-class-slot)))
 242   (assert (slot-boundp x 'x))
 243   (assert (eq nil (slot-value x 'x)))
 244   (assert (slot-boundp x 'y))
 245   (assert (= 1 (slot-value x 'y))))
 246 ;;; extra paranoia: check that we haven't broken the instance-slot class
 247 (let ((x (make-instance 'class-to-add-instance-slot)))
 248   (assert (slot-boundp x 'x))
 249   (assert (eq t (slot-value x 'x)))
 250   (assert (not (slot-boundp x 'y))))
 251 \f
 252 ;;;; the CTOR optimization was insufficiently careful about its
 253 ;;;; assumptions: firstly, it failed with a failed AVER for
 254 ;;;; non-standard-allocation slots:
 255 (defclass class-with-frob-slot ()
 256   ((frob-slot :initarg :frob-slot :allocation :frob)))
 257 (handler-case
 258     (funcall (compile nil '(lambda ()
 259                             (make-instance 'class-with-frob-slot
 260                              :frob-slot 1))))
 261   (sb-int:bug (c) (error c))
 262   (error () "Probably OK: haven't implemented SLOT-BOUNDP-USING-CLASS"))
 263 ;;; secondly, it failed to take account of the fact that we might wish
 264 ;;; to customize (setf slot-value-using-class)
 265 (defclass class-with-special-ssvuc ()
 266   ((some-slot :initarg :some-slot)))
 267 (defvar *special-ssvuc-counter* 0)
 268 (defmethod (setf slot-value-using-class) :before
 269     (new-value class (instance class-with-special-ssvuc) slotd)
 270   (incf *special-ssvuc-counter*))
 271 (let ((fun (compile nil '(lambda () (make-instance 'class-with-special-ssvuc
 272                                      :some-slot 1)))))
 273   (assert (= *special-ssvuc-counter* 0))
 274   (funcall fun)
 275   (assert (= *special-ssvuc-counter* 1))
 276   (funcall fun)
 277   (assert (= *special-ssvuc-counter* 2)))
 278 ;;; and now with the customization after running the function once
 279 (defclass class-with-special-ssvuc-2 ()
 280   ((some-slot :initarg :some-slot)))
 281 (defvar *special-ssvuc-counter-2* 0)
 282 (let ((fun (compile nil '(lambda () (make-instance 'class-with-special-ssvuc-2
 283                                      :some-slot 1)))))
 284   (assert (= *special-ssvuc-counter-2* 0))
 285   (funcall fun)
 286   (assert (= *special-ssvuc-counter-2* 0))
 287   (defmethod (setf slot-value-using-class) :before
 288       (new-value class (instance class-with-special-ssvuc-2) slotd)
 289     (incf *special-ssvuc-counter-2*))
 290   (funcall fun)
 291   (assert (= *special-ssvuc-counter-2* 1)))
 292 \f
 293 ;;; vicious metacycle detection and resolution wasn't good enough: it
 294 ;;; didn't take account that the slots (and hence the slot readers)
 295 ;;; might be inherited from superclasses.  This example, due to Bruno
 296 ;;; Haible, also tests programmatic addition of accessors.
 297 (defclass auto-accessors-direct-slot-definition-class (standard-class)
 298   ((containing-class-name :initarg :containing-class-name)))
 299 (defmethod validate-superclass
 300     ((c1 auto-accessors-direct-slot-definition-class) (c2 standard-class))
 301   t)
 302 (defclass auto-accessors-class (standard-class)
 303   ())
 304 (defmethod direct-slot-definition-class ((class auto-accessors-class)
 305                                          &rest initargs)
 306   (let ((dsd-class-name (gensym)))
 307     (sb-pcl:ensure-class
 308      dsd-class-name
 309      :metaclass 'auto-accessors-direct-slot-definition-class
 310      :direct-superclasses (list (find-class 'standard-direct-slot-definition))
 311      :containing-class-name (class-name class))
 312     (eval `(defmethod initialize-instance :after ((dsd ,dsd-class-name)
 313                                                   &rest args)
 314             (when (and (null (slot-definition-readers dsd))
 315                        (null (slot-definition-writers dsd)))
 316               (let* ((containing-class-name
 317                       (slot-value (class-of dsd) 'containing-class-name))
 318                      (accessor-name
 319                       (intern
 320                        (concatenate 'string
 321                                     (symbol-name containing-class-name)
 322                                     "-"
 323                                     (symbol-name (slot-definition-name dsd)))
 324                        (symbol-package containing-class-name))))
 325                 (setf (slot-definition-readers dsd) (list accessor-name))
 326                 (setf (slot-definition-writers dsd)
 327                       (list (list 'setf accessor-name)))))))
 328     (find-class dsd-class-name)))
 329 (defmethod validate-superclass ((c1 auto-accessors-class) (c2 standard-class))
 330   t)
 331 (defclass testclass15 ()
 332   ((x :initarg :x) (y))
 333   (:metaclass auto-accessors-class))
 334 (let ((inst (make-instance 'testclass15 :x 12)))
 335   (assert (equal (list (testclass15-x inst) (setf (testclass15-y inst) 13))
 336                  '(12 13))))
 337
 338 ;;; bug reported by Bruno Haible on sbcl-devel 2004-11-17: incorrect
 339 ;;; handling of multiple values for non-standard slot-options
 340 (progn
 341   (defclass option-slot-definition (sb-mop:standard-direct-slot-definition)
 342     ((option :accessor sl-option :initarg :my-option)))
 343   (defclass option-slot-class (standard-class)
 344     ())
 345   (defmethod sb-mop:direct-slot-definition-class
 346       ((c option-slot-class) &rest args)
 347     (declare (ignore args))
 348     (find-class 'option-slot-definition))
 349   (defmethod sb-mop:validate-superclass
 350       ((c1 option-slot-class) (c2 standard-class))
 351     t)
 352   (eval '(defclass test-multiple-slot-option-bug ()
 353           ((x :my-option bar :my-option baz))
 354           (:metaclass option-slot-class)))
 355   (assert (null (set-difference
 356                  '(bar baz)
 357                  (sl-option (first (sb-mop:class-direct-slots
 358                                     (find-class 'test-multiple-slot-option-bug))))))))
 359
 360 ;;; bug reported by Bruno Haibel on sbcl-devel 2004-11-19: AMOP requires
 361 ;;; that CLASS-PROTOYPE signals an error if the class is not yet finalized
 362 (defclass prototype-not-finalized-sub (prototype-not-finalized-super) ())
 363 (multiple-value-bind (val err)
 364     (ignore-errors (sb-mop:class-prototype (find-class 'prototype-not-finalized-super)))
 365   (assert (null val))
 366   (assert (typep err 'error)))
 367
 368 ;;; AMOP says so
 369 (find-method (fdefinition 'sb-mop:allocate-instance) () '(built-in-class))
 370 (dolist (class-name '(fixnum bignum symbol))
 371   (let ((class (find-class class-name)))
 372     (multiple-value-bind (value error) (ignore-errors (allocate-instance class))
 373       (assert (null value))
 374       (assert (typep error 'error)))))
 375
 376 ;;; bug reported by David Morse: direct-subclass update protocol was broken
 377 (defclass vegetable () ())
 378 (defclass tomato (vegetable) ())
 379 (assert (equal (list (find-class 'tomato)) (sb-mop:class-direct-subclasses (find-class 'vegetable))))
 380 (defclass tomato () ())
 381 (assert (null (sb-mop:class-direct-subclasses (find-class 'vegetable))))
 382
 383 ;;; bug 331: lazy creation of clos classes for defstructs
 384 (defstruct bug-331-super)
 385 (defstruct (bug-331-sub (:include bug-331-super)))
 386 (let ((subs (sb-mop:class-direct-subclasses (find-class 'bug-331-super))))
 387   (assert (= 1 (length subs)))
 388   (assert (eq (car subs) (find-class 'bug-331-sub))))
 389 ;;; (addendum to test for #331: conditions suffered the same problem)
 390 (define-condition condition-bug-331-super () ())
 391 (define-condition condition-bug-331-sub (condition-bug-331-super) ())
 392 (let ((subs (sb-mop:class-direct-subclasses
 393              (find-class 'condition-bug-331-super))))
 394   (assert (= 1 (length subs)))
 395   (assert (eq (car subs) (find-class 'condition-bug-331-sub))))
 396 ;;; (addendum to the addendum: the fix for this revealed breakage in
 397 ;;; REINITIALIZE-INSTANCE)
 398 (define-condition condition-bug-331a () ((slot331a :reader slot331a)))
 399 (reinitialize-instance (find-class 'condition-bug-331a))
 400 (let* ((gf #'slot331a)
 401        (methods (sb-mop:generic-function-methods gf)))
 402   (assert (= (length methods) 1))
 403   (assert (eq (car methods)
 404               (find-method #'slot331a nil
 405                            (list (find-class 'condition-bug-331a))))))
 406
 407 ;;; detection of multiple class options in defclass, reported by Bruno Haible
 408 (defclass option-class (standard-class)
 409   ((option :accessor cl-option :initarg :my-option)))
 410 (defmethod sb-pcl:validate-superclass ((c1 option-class) (c2 standard-class))
 411   t)
 412 (multiple-value-bind (result error)
 413     (ignore-errors (eval '(defclass option-class-instance ()
 414                            ()
 415                            (:my-option bar)
 416                            (:my-option baz)
 417                            (:metaclass option-class))))
 418   (assert (not result))
 419   (assert error))
 420
 421 ;;; class as :metaclass
 422 (assert (typep
 423          (sb-mop:ensure-class-using-class
 424           nil 'class-as-metaclass-test
 425           :metaclass (find-class 'standard-class)
 426           :name 'class-as-metaclass-test
 427           :direct-superclasses (list (find-class 'standard-object)))
 428          'class))
 429 \f
 430 ;;; COMPUTE-DEFAULT-INITARGS protocol mismatch reported by Bruno
 431 ;;; Haible
 432 (defparameter *extra-initarg-value* 'extra)
 433 (defclass custom-default-initargs-class (standard-class)
 434   ())
 435 (defmethod compute-default-initargs ((class custom-default-initargs-class))
 436   (let ((original-default-initargs
 437          (remove-duplicates
 438           (reduce #'append
 439                   (mapcar #'class-direct-default-initargs
 440                           (class-precedence-list class)))
 441           :key #'car
 442           :from-end t)))
 443     (cons (list ':extra '*extra-initarg-value* #'(lambda () *extra-initarg-value*))
 444           (remove ':extra original-default-initargs :key #'car))))
 445 (defmethod validate-superclass ((c1 custom-default-initargs-class)
 446                                 (c2 standard-class))
 447   t)
 448 (defclass extra-initarg ()
 449   ((slot :initarg :extra))
 450   (:metaclass custom-default-initargs-class))
 451 (assert (eq (slot-value (make-instance 'extra-initarg) 'slot) 'extra))
 452 \f
 453 ;;; STANDARD-CLASS valid as a superclass for FUNCALLABLE-STANDARD-CLASS
 454 (defclass standard-class-for-fsc ()
 455   ((scforfsc-slot :initarg :scforfsc-slot :accessor scforfsc-slot)))
 456 (defvar *standard-class-for-fsc*
 457   (make-instance 'standard-class-for-fsc :scforfsc-slot 1))
 458 (defclass fsc-with-standard-class-superclass
 459     (standard-class-for-fsc funcallable-standard-object)
 460   ((fsc-slot :initarg :fsc-slot :accessor fsc-slot))
 461   (:metaclass funcallable-standard-class))
 462 (defvar *fsc/scs*
 463   (make-instance 'fsc-with-standard-class-superclass
 464                  :scforfsc-slot 2
 465                  :fsc-slot 3))
 466 (assert (= (scforfsc-slot *standard-class-for-fsc*) 1))
 467 (assert (= (scforfsc-slot *fsc/scs*) 2))
 468 (assert (= (fsc-slot *fsc/scs*) 3))
 469 (assert (subtypep 'fsc-with-standard-class-superclass 'function))
 470 (assert (not (subtypep 'standard-class-for-fsc 'function)))
 471
 472 ;;; also check that our sanity check for functionness is good
 473 (assert (raises-error?
 474          (progn
 475            (defclass bad-standard-class (funcallable-standard-object)
 476              ()
 477              (:metaclass standard-class))
 478            (make-instance 'bad-standard-class))))
 479 (assert (raises-error?
 480          (progn
 481            (defclass bad-funcallable-standard-class (standard-object)
 482              ()
 483              (:metaclass funcallable-standard-class))
 484            (make-instance 'bad-funcallable-standard-class))))
 485 \f
 486 ;;; we should be able to make classes with silly names
 487 (make-instance 'standard-class :name 3)
 488 (defclass foo () ())
 489 (reinitialize-instance (find-class 'foo) :name '(a b))
 490 \f
 491 ;;; classes (including anonymous ones) and eql-specializers should be
 492 ;;; allowed to be specializers.
 493 (defvar *anonymous-class*
 494   (make-instance 'standard-class
 495                  :direct-superclasses (list (find-class 'standard-object))))
 496 (defvar *object-of-anonymous-class*
 497   (make-instance *anonymous-class*))
 498 (eval `(defmethod method-on-anonymous-class ((obj ,*anonymous-class*)) 41))
 499 (assert (eql (method-on-anonymous-class *object-of-anonymous-class*) 41))
 500 (eval `(defmethod method-on-anonymous-class
 501         ((obj ,(intern-eql-specializer *object-of-anonymous-class*)))
 502         42))
 503 (assert (eql (method-on-anonymous-class *object-of-anonymous-class*) 42))
 504 \f
 505 ;;; accessors can cause early finalization, which caused confusion in
 506 ;;; the system, leading to uncompileable TYPEP problems.
 507 (defclass funcallable-class-for-typep ()
 508   ((some-slot-with-accessor :accessor some-slot-with-accessor))
 509   (:metaclass funcallable-standard-class))
 510 (compile nil '(lambda (x) (typep x 'funcallable-class-for-typep)))
 511 \f
 512 ;;; even anonymous classes should be valid types
 513 (let* ((class1 (make-instance 'standard-class :direct-superclasses (list (find-class 'standard-object))))
 514        (class2 (make-instance 'standard-class :direct-superclasses (list class1))))
 515   (assert (subtypep class2 class1))
 516   (assert (typep (make-instance class2) class1)))
 517 \f
 518 ;;; ensure-class got its treatment of :metaclass wrong.
 519 (ensure-class 'better-be-standard-class :direct-superclasses '(standard-object)
 520               :metaclass 'standard-class
 521               :metaclass 'funcallable-standard-class)
 522 (assert (eq (class-of (find-class 'better-be-standard-class))
 523             (find-class 'standard-class)))
 524
 525 ;;; CLASS-SLOTS should signal an error for classes that are not yet
 526 ;;; finalized. Reported by Levente Meszaros on sbcl-devel.
 527 (defclass has-slots-but-isnt-finalized () (a b c))
 528 (let ((class (find-class 'has-slots-but-isnt-finalized)))
 529   (assert (not (sb-mop:class-finalized-p class)))
 530   (assert (raises-error? (sb-mop:class-slots class) sb-kernel::reference-condition)))
 531
 532 ;;; Check that MAKE-METHOD-LAMBDA which wraps the original body doesn't
 533 ;;; break RETURN-FROM.
 534 (defclass wrapped-generic (standard-generic-function)
 535   ()
 536   (:metaclass sb-mop:funcallable-standard-class))
 537
 538 (defmethod sb-mop:make-method-lambda ((gf wrapped-generic) method lambda env)
 539   (call-next-method gf method
 540                     `(lambda ,(second lambda)
 541                        (flet ((default () :default))
 542                          ,@(cddr lambda)))
 543                     env))
 544
 545 (defgeneric wrapped (x)
 546   (:generic-function-class wrapped-generic))
 547
 548 (defmethod wrapped ((x cons))
 549   (return-from wrapped (default)))
 550
 551 (with-test (:name :make-method-lambda-wrapping+return-from)
 552   (assert (eq :default (wrapped (cons t t)))))
 553
 554 (with-test (:name :slow-method-is-fboundp)
 555   (assert (fboundp '(sb-pcl::slow-method wrapped (cons))))
 556   (assert (eq :default (funcall #'(sb-pcl::slow-method wrapped (cons)) (list (cons t t)) nil))))
 557
 558 ;;; Check that SLOT-BOUNDP-USING-CLASS doesn't confuse MAKE-INSTANCE
 559 ;;; optimizations.
 560 (defclass sbuc-mio-test-class (standard-class)
 561   ())
 562 (defmethod validate-superclass ((class sbuc-mio-test-class)
 563                                 (superclass standard-class))
 564   t)
 565 (defvar *sbuc-counter* 0)
 566 (defmethod slot-boundp-using-class ((class sbuc-mio-test-class)
 567                                     (object t)
 568                                     (slot standard-effective-slot-definition))
 569   (incf *sbuc-counter*)
 570   (call-next-method))
 571 (defclass sbuc-mio-test-object ()
 572   ((slot :initform 5 :accessor a-slot))
 573   (:metaclass sbuc-mio-test-class))
 574 (with-test (:name :sbuc-mio-test)
 575   (assert (= 5 (funcall
 576                 (compile
 577                  nil
 578                  `(lambda ()
 579                     (let ((object (make-instance 'sbuc-mio-test-object)))
 580                       (slot-value object 'slot)))))))
 581   (assert (= 1 *sbuc-counter*)))
 582
 583 ;;; Redefining classes so that slot definition class changes.
 584 (defclass func-slot-class (standard-class)
 585   ())
 586
 587 (defmethod sb-mop:validate-superclass ((class func-slot-class) (super standard-class))
 588   t)
 589
 590 (defclass func-slot-definition ()
 591   ((function :initform nil :initarg :function :reader slotd-function)))
 592
 593 (defclass effective-func-slot-definition (sb-mop:standard-effective-slot-definition
 594                                           func-slot-definition)
 595   ())
 596
 597 (defclass direct-func-slot-definition (sb-mop:standard-direct-slot-definition
 598                                        func-slot-definition)
 599   ())
 600
 601 (defmethod sb-mop:slot-value-using-class ((class func-slot-class)
 602                                           instance
 603                                           (slotd effective-func-slot-definition))
 604   (funcall (slotd-function slotd) (call-next-method)))
 605
 606 (defvar *func-slot*)
 607
 608 (defmethod sb-mop:effective-slot-definition-class ((class func-slot-class) &key)
 609   (if *func-slot*
 610       (find-class 'effective-func-slot-definition)
 611       (call-next-method)))
 612
 613 (defmethod sb-mop:direct-slot-definition-class ((class func-slot-class) &key)
 614   (find-class 'direct-func-slot-definition))
 615
 616 (defmethod sb-mop:compute-effective-slot-definition ((class func-slot-class) name dslotds)
 617   (let* ((*func-slot* (some #'slotd-function dslotds))
 618          (slotd (call-next-method)))
 619     (when *func-slot*
 620       (setf (slot-value slotd 'function) (fdefinition *func-slot*)))
 621     slotd))
 622
 623 (with-test (:name :class-redefinition-changes-custom-slot-type)
 624   (eval `(defclass func-slot-object ()
 625            ((foo :initarg :foo :reader foofoo))
 626            (:metaclass func-slot-class)))
 627   (let ((x (cons t t)))
 628     (assert (eq x (foofoo (make-instance 'func-slot-object :foo x)))))
 629   (eval `(defclass func-slot-object ()
 630            ((foo :initarg :foo :reader foofoo :function car))
 631            (:metaclass func-slot-class)))
 632   (let* ((x (cons t t))
 633          (y (list x)))
 634     (assert (eq x (foofoo (make-instance 'func-slot-object :foo y))))))
 635
 636 (with-test (:name :class-redefinition-changes-custom-slot-type-mio)
 637   (eval `(defclass func-slot-object2 ()
 638            ((foo :initarg :foo :reader foofoo))
 639            (:metaclass func-slot-class)))
 640   (let* ((x (cons t t))
 641          (y (cons x x))
 642          (o (make-instance 'func-slot-object2 :foo y)))
 643     (assert (eq y (foofoo o)))
 644     (eval `(defclass func-slot-object2 ()
 645            ((foo :initarg :foo :reader foofoo :function car))
 646            (:metaclass func-slot-class)))
 647     (assert (eq x (foofoo o)))))
 648
 649 (defclass class-slot-removal-test ()
 650   ((instance :initform 1)
 651    (class :allocation :class :initform :ok)))
 652
 653 (defmethod update-instance-for-redefined-class ((x class-slot-removal-test) added removed plist &rest inits)
 654   (throw 'update-instance
 655     (list added removed plist inits)))
 656
 657 (with-test (:name :class-redefinition-removes-class-slot)
 658   (let ((o (make-instance 'class-slot-removal-test)))
 659     (assert (equal '(nil nil nil nil)
 660                    (catch 'update-instance
 661                      (eval `(defclass class-slot-removal-test ()
 662                               ((instance :initform 2))))
 663                      (slot-value o 'instance))))))
 664
 665 (defclass class-slot-add-test ()
 666   ((instance :initform 1)))
 667
 668 (defmethod update-instance-for-redefined-class ((x class-slot-add-test) added removed plist &rest inits)
 669   (throw 'update-instance
 670     (list added removed plist inits)))
 671
 672 (with-test (:name :class-redefinition-adds-class-slot)
 673   (let ((o (make-instance 'class-slot-add-test)))
 674     (assert (equal '(nil nil nil nil)
 675                    (catch 'update-instance
 676                      (eval `(defclass class-slot-add-test ()
 677                               ((instance :initform 2)
 678                                (class :allocation :class :initform :ok))))
 679                      (slot-value o 'instance))))))
 680 \f
 681 ;;;; success