tests/clos.impure.lisp

   1 ;;;; miscellaneous side-effectful tests of CLOS
   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 (load "assertoid.lisp")
  15
  16 (defpackage "CLOS-IMPURE"
  17   (:use "CL" "ASSERTOID"))
  18 (in-package "CLOS-IMPURE")
  19 \f
  20 ;;; It should be possible to do DEFGENERIC and DEFMETHOD referring to
  21 ;;; structure types defined earlier in the file.
  22 (defstruct struct-a x y)
  23 (defstruct struct-b x y z)
  24 (defmethod wiggle ((a struct-a))
  25   (+ (struct-a-x a)
  26      (struct-a-y a)))
  27 (defgeneric jiggle (arg))
  28 (defmethod jiggle ((a struct-a))
  29   (- (struct-a-x a)
  30      (struct-a-y a)))
  31 (defmethod jiggle ((b struct-b))
  32   (- (struct-b-x b)
  33      (struct-b-y b)
  34      (struct-b-z b)))
  35 (assert (= (wiggle (make-struct-a :x 6 :y 5))
  36            (jiggle (make-struct-b :x 19 :y 6 :z 2))))
  37
  38 ;;; Compiling DEFGENERIC should prevent "undefined function" style
  39 ;;; warnings from code within the same file.
  40 (defgeneric gf-defined-in-this-file (x y))
  41 (defun function-using-gf-defined-in-this-file (x y n)
  42   (unless (minusp n)
  43     (gf-defined-in-this-file x y)))
  44
  45 ;;; Until Martin Atzmueller ported Pierre Mai's CMU CL fixes in
  46 ;;; sbcl-0.6.12.25, the implementation of NO-APPLICABLE-METHOD was
  47 ;;; broken in such a way that the code here would signal an error.
  48 (defgeneric zut-n-a-m (a b c))
  49 (defmethod no-applicable-method ((zut-n-a-m (eql #'zut-n-a-m)) &rest args)
  50   (format t "~&No applicable method for ZUT-N-A-M ~S, yet.~%" args))
  51 (zut-n-a-m 1 2 3)
  52
  53 ;;; bug reported and fixed by Alexey Dejneka sbcl-devel 2001-09-10:
  54 ;;; This DEFGENERIC shouldn't cause an error.
  55 (defgeneric ad-gf (a) (:method :around (x) x))
  56
  57 ;;; DEFGENERIC and DEFMETHOD shouldn't accept &REST when it's not
  58 ;;; followed by a variable:
  59 ;;; e.g. (DEFMETHOD FOO ((X T) &REST) NIL) should signal an error.
  60 (eval-when (:load-toplevel :compile-toplevel :execute)
  61   (defmacro expect-error (&body body)
  62     `(multiple-value-bind (res condition)
  63       (ignore-errors (progn ,@body))
  64       (declare (ignore res))
  65       (typep condition 'error))))
  66 (assert (expect-error
  67          (macroexpand-1
  68           '(defmethod foo0 ((x t) &rest) nil))))
  69 (assert (expect-error (defgeneric foo1 (x &rest))))
  70 (assert (expect-error (defgeneric foo2 (x a &rest))))
  71 (defgeneric foo3 (x &rest y))
  72 (defmethod foo3 ((x t) &rest y) nil)
  73 (defmethod foo4 ((x t) &key y &rest z) nil)
  74 (defgeneric foo4 (x &rest z &key y))
  75 (assert (expect-error (defgeneric foo5 (x &rest))))
  76 (assert (expect-error (macroexpand-1 '(defmethod foo6 (x &rest)))))
  77
  78 ;;; more lambda-list checking
  79 ;;;
  80 ;;; DEFGENERIC lambda lists are subject to various limitations, as per
  81 ;;; section 3.4.2 of the ANSI spec. Since Alexey Dejneka's patch for
  82 ;;; bug 191-b ca. sbcl-0.7.22, these limitations should be enforced.
  83 (labels ((coerce-to-boolean (x)
  84            (if x t nil))
  85          (%like-or-dislike (expr expected-failure-p)
  86            (declare (type boolean expected-failure-p))
  87            (format t "~&trying ~S~%" expr)
  88            (multiple-value-bind (fun warnings-p failure-p)
  89              (compile nil
  90                       `(lambda ()
  91                          ,expr))
  92              (declare (ignore fun))
  93              ;; In principle the constraint on WARNINGS-P below seems
  94              ;; reasonable, but in practice we get warnings about
  95              ;; undefined functions from the DEFGENERICs, apparently
  96              ;; because the DECLAIMs which ordinarily prevent such
  97              ;; warnings don't take effect because EVAL-WHEN
  98              ;; (:COMPILE-TOPLEVEL) loses its magic when compiled
  99              ;; within a LAMBDA. So maybe we can't test WARNINGS-P
 100              ;; after all?
 101              ;;(unless expected-failure-p
 102              ;;  (assert (not warnings-p)))
 103              (assert (eq (coerce-to-boolean failure-p) expected-failure-p))))
 104          (like (expr)
 105            (%like-or-dislike expr nil))
 106          (dislike (expr)
 107            (%like-or-dislike expr t)))
 108   ;; basic sanity
 109   (dislike '(defgeneric gf-for-ll-test-0 ("a" #p"b")))
 110   (like    '(defgeneric gf-for-ll-test-1 ()))
 111   (like    '(defgeneric gf-for-ll-test-2 (x)))
 112   ;; forbidden default or supplied-p for &OPTIONAL or &KEY arguments
 113   (dislike '(defgeneric gf-for-ll-test-3 (x &optional (y 0))))
 114   (like    '(defgeneric gf-for-ll-test-4 (x &optional y)))
 115   (dislike '(defgeneric gf-for-ll-test-5 (x y &key (z :z z-p))))
 116   (like    '(defgeneric gf-for-ll-test-6 (x y &key z)))
 117   (dislike '(defgeneric gf-for-ll-test-7 (x &optional (y 0) &key z)))
 118   (like    '(defgeneric gf-for-ll-test-8 (x &optional y &key z)))
 119   (dislike '(defgeneric gf-for-ll-test-9 (x &optional y &key (z :z))))
 120   (like    '(defgeneric gf-for-ll-test-10 (x &optional y &key z)))
 121   (dislike '(defgeneric gf-for-ll-test-11 (&optional &key (k :k k-p))))
 122   (like    '(defgeneric gf-for-ll-test-12 (&optional &key k)))
 123   ;; forbidden &AUX
 124   (dislike '(defgeneric gf-for-ll-test-13 (x y z &optional a &aux g h)))
 125   (like    '(defgeneric gf-for-ll-test-14 (x y z &optional a)))
 126   (dislike '(defgeneric gf-for-ll-test-bare-aux-1 (x &aux)))
 127   (like    '(defgeneric gf-for-ll-test-bare-aux-2 (x)))
 128   ;; also can't use bogoDEFMETHODish type-qualifier-ish decorations
 129   ;; on required arguments
 130   (dislike '(defgeneric gf-for-11-test-15 ((arg t))))
 131   (like '(defgeneric gf-for-11-test-16 (arg))))
 132
 133 ;;; structure-class tests setup
 134 (defclass structure-class-foo1 () () (:metaclass cl:structure-class))
 135 (defclass structure-class-foo2 (structure-class-foo1)
 136   () (:metaclass cl:structure-class))
 137
 138 ;;; standard-class tests setup
 139 (defclass standard-class-foo1 () () (:metaclass cl:standard-class))
 140 (defclass standard-class-foo2 (standard-class-foo1)
 141   () (:metaclass cl:standard-class))
 142
 143 (assert (typep (class-of (make-instance 'structure-class-foo1))
 144                'structure-class))
 145 (assert (typep (make-instance 'structure-class-foo1) 'structure-class-foo1))
 146 (assert (typep (make-instance 'standard-class-foo1) 'standard-class-foo1))
 147
 148 ;;; DEFGENERIC's blow-away-old-methods behavior is specified to have
 149 ;;; special hacks to distinguish between defined-with-DEFGENERIC-:METHOD
 150 ;;; methods and defined-with-DEFMETHOD methods, so that reLOADing
 151 ;;; DEFGENERIC-containing files does the right thing instead of
 152 ;;; randomly slicing your generic functions. (APD made this work
 153 ;;; in sbcl-0.7.0.2.)
 154 (defgeneric born-to-be-redefined (x)
 155   (:method ((x integer))
 156     'integer))
 157 (defmethod born-to-be-redefined ((x real))
 158   'real)
 159 (assert (eq (born-to-be-redefined 1) 'integer))
 160 (defgeneric born-to-be-redefined (x))
 161 (assert (eq (born-to-be-redefined 1) 'real)) ; failed until sbcl-0.7.0.2
 162 (defgeneric born-to-be-redefined (x)
 163   (:method ((x integer))
 164     'integer))
 165 (defmethod born-to-be-redefined ((x integer))
 166   'int)
 167 (assert (eq (born-to-be-redefined 1) 'int))
 168 (defgeneric born-to-be-redefined (x))
 169 (assert (eq (born-to-be-redefined 1) 'int))
 170 \f
 171 ;;; In the removal of ITERATE from SB-PCL, a bug was introduced
 172 ;;; preventing forward-references and also change-class (which
 173 ;;; forward-references used interally) from working properly.  One
 174 ;;; symptom was reported by Brian Spilsbury (sbcl-devel 2002-04-08),
 175 ;;; and another on IRC by Dan Barlow simultaneously.  Better check
 176 ;;; that it doesn't happen again.
 177 ;;;
 178 ;;; First, the forward references:
 179 (defclass forward-ref-a (forward-ref-b) ())
 180 (defclass forward-ref-b () ())
 181 ;;; (a couple more complicated examples found by Paul Dietz' test
 182 ;;; suite):
 183 (defclass forward-ref-c1 (forward-ref-c2) ())
 184 (defclass forward-ref-c2 (forward-ref-c3) ())
 185
 186 (defclass forward-ref-d1 (forward-ref-d2 forward-ref-d3) ())
 187 (defclass forward-ref-d2 (forward-ref-d4 forward-ref-d5) ())
 188
 189 ;;; Then change-class
 190 (defclass class-with-slots ()
 191   ((a-slot :initarg :a-slot :accessor a-slot)
 192    (b-slot :initarg :b-slot :accessor b-slot)
 193    (c-slot :initarg :c-slot :accessor c-slot)))
 194 (let ((foo (make-instance 'class-with-slots
 195                           :a-slot 1
 196                           :b-slot 2
 197                           :c-slot 3)))
 198   (let ((bar (change-class foo 'class-with-slots)))
 199     (assert (= (a-slot bar) 1))
 200     (assert (= (b-slot bar) 2))
 201     (assert (= (c-slot bar) 3))))
 202
 203 ;;; some more CHANGE-CLASS testing, now that we have an ANSI-compliant
 204 ;;; version (thanks to Espen Johnsen)
 205 (defclass from-class ()
 206   ((foo :initarg :foo :accessor foo)))
 207 (defclass to-class ()
 208   ((foo :initarg :foo :accessor foo)
 209    (bar :initarg :bar :accessor bar)))
 210 (let* ((from (make-instance 'from-class :foo 1))
 211        (to (change-class from 'to-class :bar 2)))
 212   (assert (= (foo to) 1))
 213   (assert (= (bar to) 2)))
 214
 215 ;;; Until Pierre Mai's patch (sbcl-devel 2002-06-18, merged in
 216 ;;; sbcl-0.7.4.39) the :MOST-SPECIFIC-LAST option had no effect.
 217 (defgeneric bug180 (x)
 218   (:method-combination list :most-specific-last))
 219 (defmethod bug180 list ((x number))
 220   'number)
 221 (defmethod bug180 list ((x fixnum))
 222   'fixnum)
 223 (assert (equal (bug180 14) '(number fixnum)))
 224 \f
 225 ;;; printing a structure class should not loop indefinitely (or cause
 226 ;;; a stack overflow):
 227 (defclass test-printing-structure-class ()
 228   ((slot :initarg :slot))
 229   (:metaclass structure-class))
 230 (print (make-instance 'test-printing-structure-class :slot 2))
 231
 232 ;;; structure-classes should behave nicely when subclassed
 233 (defclass super-structure ()
 234   ((a :initarg :a :accessor a-accessor)
 235    (b :initform 2 :reader b-reader))
 236   (:metaclass structure-class))
 237 (defclass sub-structure (super-structure)
 238   ((c :initarg :c :writer c-writer :accessor c-accessor))
 239   (:metaclass structure-class))
 240 (let ((foo (make-instance 'sub-structure :a 1 :c 3)))
 241   (assert (= (a-accessor foo) 1))
 242   (assert (= (b-reader foo) 2))
 243   (assert (= (c-accessor foo) 3))
 244   (setf (a-accessor foo) 4)
 245   (c-writer 5 foo)
 246   (assert (= (a-accessor foo) 4))
 247   (assert (= (c-accessor foo) 5)))
 248 \f
 249 ;;; At least as of sbcl-0.7.4, PCL has code to support a special
 250 ;;; encoding of effective method functions for slot accessors as
 251 ;;; FIXNUMs. Given this special casing, it'd be easy for slot accessor
 252 ;;; functions to get broken in special ways even though ordinary
 253 ;;; generic functions work. As of sbcl-0.7.4 we didn't have any tests
 254 ;;; for that possibility. Now we have a few tests:
 255 (defclass fish ()
 256   ((fin :reader ffin :writer ffin!)
 257    (tail :reader ftail :writer ftail!)))
 258 (defvar *fish* (make-instance 'fish))
 259 (ffin! 'triangular-fin *fish*)
 260 (defclass cod (fish) ())
 261 (defvar *cod* (make-instance 'cod))
 262 (defparameter *clos-dispatch-side-fx* (make-array 0 :fill-pointer 0))
 263 (defmethod ffin! (new-fin (cod cod))
 264   (format t "~&about to set ~S fin to ~S~%" cod new-fin)
 265   (vector-push-extend '(cod) *clos-dispatch-side-fx*)
 266   (prog1
 267       (call-next-method)
 268     (format t "~&done setting ~S fin to ~S~%" cod new-fin)))
 269 (defmethod ffin! :before (new-fin (cod cod))
 270   (vector-push-extend '(:before cod) *clos-dispatch-side-fx*)
 271   (format t "~&exploring the CLOS dispatch zoo with COD fins~%"))
 272 (ffin! 'almost-triang-fin *cod*)
 273 (assert (eq (ffin *cod*) 'almost-triang-fin))
 274 (assert (equalp #((:before cod) (cod)) *clos-dispatch-side-fx*))
 275 \f
 276 ;;; Until sbcl-0.7.6.21, the long form of DEFINE-METHOD-COMBINATION
 277 ;;; ignored its options; Gerd Moellmann found and fixed the problem
 278 ;;; for cmucl (cmucl-imp 2002-06-18).
 279 (define-method-combination test-mc (x)
 280   ;; X above being a method-group-specifier
 281   ((primary () :required t))
 282   `(call-method ,(first primary)))
 283
 284 (defgeneric gf (obj)
 285   (:method-combination test-mc 1))
 286
 287 (defmethod gf (obj)
 288   obj)
 289 \f
 290 ;;; Until sbcl-0.7.7.20, some conditions weren't being signalled, and
 291 ;;; some others were of the wrong type:
 292 (macrolet ((assert-program-error (form)
 293              `(multiple-value-bind (value error)
 294                   (ignore-errors ,form)
 295                 (assert (null value))
 296                 (assert (typep error 'program-error)))))
 297   (assert-program-error (defclass foo001 () (a b a)))
 298   (assert-program-error (defclass foo002 ()
 299                           (a b)
 300                           (:default-initargs x 'a x 'b)))
 301   (assert-program-error (defclass foo003 ()
 302                           ((a :allocation :class :allocation :class))))
 303   (assert-program-error (defclass foo004 ()
 304                           ((a :silly t))))
 305   ;; and some more, found by Wolfhard Buss and fixed for cmucl by Gerd
 306   ;; Moellmann in sbcl-0.7.8.x:
 307   (assert-program-error (progn
 308                           (defmethod odd-key-args-checking (&key (key 42)) key)
 309                           (odd-key-args-checking 3)))
 310   (assert (= (odd-key-args-checking) 42))
 311   (assert (eq (odd-key-args-checking :key t) t))
 312   ;; yet some more, fixed in sbcl-0.7.9.xx
 313   (assert-program-error (defclass foo005 ()
 314                           (:metaclass sb-pcl::funcallable-standard-class)
 315                           (:metaclass 1)))
 316   (assert-program-error (defclass foo006 ()
 317                           ((a :reader (setf a)))))
 318   (assert-program-error (defclass foo007 ()
 319                           ((a :initarg 1))))
 320   (assert-program-error (defclass foo008 ()
 321                           (a :initarg :a)
 322                           (:default-initargs :a 1)
 323                           (:default-initargs :a 2))))
 324 \f
 325 ;;; DOCUMENTATION's argument-precedence-order wasn't being faithfully
 326 ;;; preserved through the bootstrap process until sbcl-0.7.8.39.
 327 ;;; (thanks to Gerd Moellmann)
 328 (let ((answer (documentation '+ 'function)))
 329   (assert (stringp answer))
 330   (defmethod documentation ((x (eql '+)) y) "WRONG")
 331   (assert (string= (documentation '+ 'function) answer)))
 332 \f
 333 ;;; only certain declarations are permitted in DEFGENERIC
 334 (macrolet ((assert-program-error (form)
 335              `(multiple-value-bind (value error)
 336                   (ignore-errors ,form)
 337                 (assert (null value))
 338                 (assert (typep error 'program-error)))))
 339   (assert-program-error (defgeneric bogus-declaration (x)
 340                           (declare (special y))))
 341   (assert-program-error (defgeneric bogus-declaration2 (x)
 342                           (declare (notinline concatenate)))))
 343 ;;; CALL-NEXT-METHOD should call NO-NEXT-METHOD if there is no next
 344 ;;; method.
 345 (defmethod no-next-method-test ((x integer)) (call-next-method))
 346 (assert (null (ignore-errors (no-next-method-test 1))))
 347 (defmethod no-next-method ((g (eql #'no-next-method-test)) m &rest args)
 348   'success)
 349 (assert (eq (no-next-method-test 1) 'success))
 350 (assert (null (ignore-errors (no-next-method-test 'foo))))
 351 \f
 352 ;;; regression test for bug 176, following a fix that seems
 353 ;;; simultaneously to fix 140 while not exposing 176 (by Gerd
 354 ;;; Moellmann, merged in sbcl-0.7.9.12).
 355 (dotimes (i 10)
 356   (let ((lastname (intern (format nil "C176-~D" (1- i))))
 357         (name (intern (format nil "C176-~D" i))))
 358   (eval `(defclass ,name
 359              (,@(if (= i 0) nil (list lastname)))
 360            ()))
 361   (eval `(defmethod initialize-instance :after ((x ,name) &rest any)
 362            (declare (ignore any))))))
 363 (defclass b176 () (aslot-176))
 364 (defclass c176-0 (b176) ())
 365 (assert (= 1 (setf (slot-value (make-instance 'c176-9) 'aslot-176) 1)))
 366 \f
 367 ;;; DEFINE-METHOD-COMBINATION was over-eager at checking for duplicate
 368 ;;; primary methods:
 369 (define-method-combination dmc-test-mc (&optional (order :most-specific-first))
 370   ((around (:around))
 371    (primary (dmc-test-mc) :order order :required t))
 372    (let ((form (if (rest primary)
 373                    `(and ,@(mapcar #'(lambda (method)
 374                                        `(call-method ,method))
 375                                    primary))
 376                    `(call-method ,(first primary)))))
 377      (if around
 378          `(call-method ,(first around)
 379                        (,@(rest around)
 380                         (make-method ,form)))
 381          form)))
 382
 383 (defgeneric dmc-test-mc (&key k)
 384   (:method-combination dmc-test-mc))
 385
 386 (defmethod dmc-test-mc dmc-test-mc (&key k)
 387            k)
 388
 389 (dmc-test-mc :k 1)
 390 ;;; While I'm at it, DEFINE-METHOD-COMBINATION is defined to return
 391 ;;; the NAME argument, not some random method object. So:
 392 (assert (eq (define-method-combination dmc-test-return-foo)
 393             'dmc-test-return-foo))
 394 (assert (eq (define-method-combination dmc-test-return-bar :operator and)
 395             'dmc-test-return-bar))
 396 (assert (eq (define-method-combination dmc-test-return
 397                 (&optional (order :most-specific-first))
 398               ((around (:around))
 399                (primary (dmc-test-return) :order order :required t))
 400               (let ((form (if (rest primary)
 401                               `(and ,@(mapcar #'(lambda (method)
 402                                                   `(call-method ,method))
 403                                               primary))
 404                               `(call-method ,(first primary)))))
 405                 (if around
 406                     `(call-method ,(first around)
 407                       (,@(rest around)
 408                        (make-method ,form)))
 409                     form)))
 410             'dmc-test-return))
 411 \f
 412 ;;; DEFMETHOD should signal a PROGRAM-ERROR if an incompatible lambda
 413 ;;; list is given:
 414 (defmethod incompatible-ll-test-1 (x) x)
 415 (multiple-value-bind (result error)
 416     (ignore-errors (defmethod incompatible-ll-test-1 (x y) y))
 417   (assert (null result))
 418   (assert (typep error 'program-error)))
 419 (multiple-value-bind (result error)
 420     (ignore-errors (defmethod incompatible-ll-test-1 (x &rest y) y))
 421   (assert (null result))
 422   (assert (typep error 'program-error)))
 423 ;;; Sneakily using a bit of MOPness to check some consistency
 424 (assert (= (length
 425             (sb-pcl:generic-function-methods #'incompatible-ll-test-1)) 1))
 426
 427 (defmethod incompatible-ll-test-2 (x &key bar) bar)
 428 (multiple-value-bind (result error)
 429     (ignore-errors (defmethod incompatible-ll-test-2 (x) x))
 430   (assert (null result))
 431   (assert (typep error 'program-error)))
 432 (defmethod incompatible-ll-test-2 (x &rest y) y)
 433 (assert (= (length
 434             (sb-pcl:generic-function-methods #'incompatible-ll-test-2)) 1))
 435 (defmethod incompatible-ll-test-2 ((x integer) &key bar) bar)
 436 (assert (= (length
 437             (sb-pcl:generic-function-methods #'incompatible-ll-test-2)) 2))
 438 (assert (equal (incompatible-ll-test-2 t 1 2) '(1 2)))
 439 (assert (eq (incompatible-ll-test-2 1 :bar 'yes) 'yes))
 440 \f
 441 ;;; Attempting to instantiate classes with forward references in their
 442 ;;; CPL should signal errors (FIXME: of what type?)
 443 (defclass never-finished-class (this-one-unfinished-too) ())
 444 (multiple-value-bind (result error)
 445     (ignore-errors (make-instance 'never-finished-class))
 446   (assert (null result))
 447   (assert (typep error 'error)))
 448 (multiple-value-bind (result error)
 449     (ignore-errors (make-instance 'this-one-unfinished-too))
 450   (assert (null result))
 451   (assert (typep error 'error)))
 452 \f
 453 ;;; Classes with :ALLOCATION :CLASS slots should be subclassable (and
 454 ;;; weren't for a while in sbcl-0.7.9.xx)
 455 (defclass superclass-with-slot ()
 456   ((a :allocation :class)))
 457 (defclass subclass-for-class-allocation (superclass-with-slot) ())
 458 (make-instance 'subclass-for-class-allocation)
 459 \f
 460 ;;; bug #136: CALL-NEXT-METHOD was being a little too lexical,
 461 ;;; resulting in failure in the following:
 462 (defmethod call-next-method-lexical-args ((x integer))
 463   x)
 464 (defmethod call-next-method-lexical-args :around ((x integer))
 465   (let ((x (1+ x)))
 466     (call-next-method)))
 467 (assert (= (call-next-method-lexical-args 3) 3))
 468 \f
 469 ;;; DEFINE-METHOD-COMBINATION with arguments was hopelessly broken
 470 ;;; until 0.7.9.5x
 471 (defvar *d-m-c-args-test* nil)
 472 (define-method-combination progn-with-lock ()
 473   ((methods ()))
 474   (:arguments object)
 475   `(unwind-protect
 476     (progn (lock (object-lock ,object))
 477            ,@(mapcar #'(lambda (method)
 478                          `(call-method ,method))
 479                      methods))
 480     (unlock (object-lock ,object))))
 481 (defun object-lock (obj)
 482   (push "object-lock" *d-m-c-args-test*)
 483   obj)
 484 (defun unlock (obj)
 485   (push "unlock" *d-m-c-args-test*)
 486   obj)
 487 (defun lock (obj)
 488   (push "lock" *d-m-c-args-test*)
 489   obj)
 490 (defgeneric d-m-c-args-test (x)
 491   (:method-combination progn-with-lock))
 492 (defmethod d-m-c-args-test ((x symbol))
 493   (push "primary" *d-m-c-args-test*))
 494 (defmethod d-m-c-args-test ((x number))
 495   (error "foo"))
 496 (assert (equal (d-m-c-args-test t) '("primary" "lock" "object-lock")))
 497 (assert (equal *d-m-c-args-test*
 498                '("unlock" "object-lock" "primary" "lock" "object-lock")))
 499 (setf *d-m-c-args-test* nil)
 500 (ignore-errors (d-m-c-args-test 1))
 501 (assert (equal *d-m-c-args-test*
 502                '("unlock" "object-lock" "lock" "object-lock")))
 503 \f
 504 ;;; The walker (on which DEFMETHOD depended) didn't know how to handle
 505 ;;; SYMBOL-MACROLET properly.  In fact, as of sbcl-0.7.10.20 it still
 506 ;;; doesn't, but it does well enough to compile the following without
 507 ;;; error (the problems remain in asking for a complete macroexpansion
 508 ;;; of an arbitrary form).
 509 (symbol-macrolet ((x 1))
 510   (defmethod bug222 (z)
 511     (macrolet ((frob (form) `(progn ,form ,x)))
 512       (frob (print x)))))
 513 (assert (= (bug222 t) 1))
 514
 515 ;;; also, a test case to guard against bogus environment hacking:
 516 (eval-when (:compile-toplevel :load-toplevel :execute)
 517   (setq bug222-b 3))
 518 ;;; this should at the least compile:
 519 (let ((bug222-b 1))
 520   (defmethod bug222-b (z stream)
 521     (macrolet ((frob (form) `(progn ,form ,bug222-b)))
 522       (frob (format stream "~D~%" bug222-b)))))
 523 ;;; and it would be nice (though not specified by ANSI) if the answer
 524 ;;; were as follows:
 525 (let ((x (make-string-output-stream)))
 526   ;; not specified by ANSI
 527   (assert (= (bug222-b t x) 3))
 528   ;; specified.
 529   (assert (char= (char (get-output-stream-string x) 0) #\1)))
 530 \f
 531 ;;; REINITIALIZE-INSTANCE, in the ctor optimization, wasn't checking
 532 ;;; for invalid initargs where it should:
 533 (defclass class234 () ())
 534 (defclass subclass234 (class234) ())
 535 (defvar *bug234* 0)
 536 (defun bug-234 ()
 537   (reinitialize-instance (make-instance 'class234) :dummy 0))
 538 (defun subbug-234 ()
 539   (reinitialize-instance (make-instance 'subclass234) :dummy 0))
 540 (assert (raises-error? (bug-234) program-error))
 541 (defmethod shared-initialize :after ((i class234) slots &key dummy)
 542   (incf *bug234*))
 543 (assert (typep (subbug-234) 'subclass234))
 544 (assert (= *bug234*
 545            ;; once for MAKE-INSTANCE, once for REINITIALIZE-INSTANCE
 546            2))
 547
 548 ;;; also, some combinations of MAKE-INSTANCE and subclassing missed
 549 ;;; new methods (Gerd Moellmann sbcl-devel 2002-12-29):
 550 (defclass class234-b1 () ())
 551 (defclass class234-b2 (class234-b1) ())
 552 (defvar *bug234-b* 0)
 553 (defun bug234-b ()
 554   (make-instance 'class234-b2))
 555 (compile 'bug234-b)
 556 (bug234-b)
 557 (assert (= *bug234-b* 0))
 558 (defmethod initialize-instance :before ((x class234-b1) &rest args)
 559   (declare (ignore args))
 560   (incf *bug234-b*))
 561 (bug234-b)
 562 (assert (= *bug234-b* 1))
 563 \f
 564 ;;; we should be able to make classes with uninterned names:
 565 (defclass #:class-with-uninterned-name () ())
 566 \f
 567 ;;; SLOT-MISSING should be called when there are missing slots.
 568 (defclass class-with-all-slots-missing () ())
 569 (defmethod slot-missing (class (o class-with-all-slots-missing)
 570                          slot-name op
 571                          &optional new-value)
 572   op)
 573 (assert (eq (slot-value (make-instance 'class-with-all-slots-missing) 'foo)
 574             'slot-value))
 575 (assert (eq (funcall (lambda (x) (slot-value x 'bar))
 576                      (make-instance 'class-with-all-slots-missing))
 577             'slot-value))
 578 (assert (eq (funcall (lambda (x) (setf (slot-value x 'baz) 'baz))
 579                      (make-instance 'class-with-all-slots-missing))
 580             'setf))
 581 \f
 582 ;;; we should be able to specialize on anything that names a class.
 583 (defclass name-for-class () ())
 584 (defmethod something-that-specializes ((x name-for-class)) 1)
 585 (setf (find-class 'other-name-for-class) (find-class 'name-for-class))
 586 (defmethod something-that-specializes ((x other-name-for-class)) 2)
 587 (assert (= (something-that-specializes (make-instance 'name-for-class)) 2))
 588 (assert (= (something-that-specializes (make-instance 'other-name-for-class))
 589            2))
 590 \f
 591 ;;; more forward referenced classes stuff
 592 (defclass frc-1 (frc-2) ())
 593 (assert (subtypep 'frc-1 (find-class 'frc-2)))
 594 (assert (subtypep (find-class 'frc-1) 'frc-2))
 595 (assert (not (subtypep (find-class 'frc-2) 'frc-1)))
 596 (defclass frc-2 (frc-3) ((a :initarg :a)))
 597 (assert (subtypep 'frc-1 (find-class 'frc-3)))
 598 (defclass frc-3 () ())
 599 (assert (typep (make-instance 'frc-1 :a 2) (find-class 'frc-1)))
 600 (assert (typep (make-instance 'frc-2 :a 3) (find-class 'frc-2)))
 601 \f
 602 ;;; check that we can define classes with two slots of different names
 603 ;;; (even if it STYLE-WARNs).
 604 (defclass odd-name-class ()
 605   ((name :initarg :name)
 606    (cl-user::name :initarg :name2)))
 607 (let ((x (make-instance 'odd-name-class :name 1 :name2 2)))
 608   (assert (= (slot-value x 'name) 1))
 609   (assert (= (slot-value x 'cl-user::name) 2)))
 610 \f
 611 ;;;; success
 612 (sb-ext:quit :unix-status 104)