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 (defpackage "FOO"
  15   (:use "CL"))
  16 (in-package "FOO")
  17 \f
  18 ;;; It should be possible to do DEFGENERIC and DEFMETHOD referring to
  19 ;;; structure types defined earlier in the file.
  20 (defstruct struct-a x y)
  21 (defstruct struct-b x y z)
  22 (defmethod wiggle ((a struct-a))
  23   (+ (struct-a-x a)
  24      (struct-a-y a)))
  25 (defgeneric jiggle (arg))
  26 (defmethod jiggle ((a struct-a))
  27   (- (struct-a-x a)
  28      (struct-a-y a)))
  29 (defmethod jiggle ((b struct-b))
  30   (- (struct-b-x b)
  31      (struct-b-y b)
  32      (struct-b-z b)))
  33 (assert (= (wiggle (make-struct-a :x 6 :y 5))
  34            (jiggle (make-struct-b :x 19 :y 6 :z 2))))
  35
  36 ;;; Compiling DEFGENERIC should prevent "undefined function" style
  37 ;;; warnings from code within the same file.
  38 (defgeneric gf-defined-in-this-file (x y))
  39 (defun function-using-gf-defined-in-this-file (x y n)
  40   (unless (minusp n)
  41     (gf-defined-in-this-file x y)))
  42
  43 ;;; Until Martin Atzmueller ported Pierre Mai's CMU CL fixes in
  44 ;;; sbcl-0.6.12.25, the implementation of NO-APPLICABLE-METHOD was
  45 ;;; broken in such a way that the code here would signal an error.
  46 (defgeneric zut-n-a-m (a b c))
  47 (defmethod no-applicable-method ((zut-n-a-m (eql #'zut-n-a-m)) &rest args)
  48   (format t "~&No applicable method for ZUT-N-A-M ~S, yet.~%" args))
  49 (zut-n-a-m 1 2 3)
  50
  51 ;;; bug reported and fixed by Alexey Dejneka sbcl-devel 2001-09-10:
  52 ;;; This DEFGENERIC shouldn't cause an error.
  53 (defgeneric ad-gf (a) (:method :around (x) x))
  54
  55 ;;; DEFGENERIC and DEFMETHOD shouldn't accept &REST when it's not
  56 ;;; followed by a variable:
  57 ;;; e.g. (DEFMETHOD FOO ((X T) &REST) NIL) should signal an error.
  58 (eval-when (:load-toplevel :compile-toplevel :execute)
  59   (defmacro expect-error (&body body)
  60     `(multiple-value-bind (res condition)
  61       (ignore-errors (progn ,@body))
  62       (declare (ignore res))
  63       (typep condition 'error))))
  64 (assert (expect-error
  65          (macroexpand-1
  66           '(defmethod foo0 ((x t) &rest) nil))))
  67 (assert (expect-error (defgeneric foo1 (x &rest))))
  68 (assert (expect-error (defgeneric foo2 (x a &rest))))
  69 (defgeneric foo3 (x &rest y))
  70 (defmethod foo3 ((x t) &rest y) nil)
  71 (defmethod foo4 ((x t) &key y &rest z) nil)
  72 (defgeneric foo4 (x &rest z &key y))
  73 (assert (expect-error (defgeneric foo5 (x &rest))))
  74 (assert (expect-error (macroexpand-1 '(defmethod foo6 (x &rest)))))
  75
  76 ;;; more lambda-list checking
  77 ;;;
  78 ;;; DEFGENERIC lambda lists are subject to various limitations, as per
  79 ;;; section 3.4.2 of the ANSI spec. Since Alexey Dejneka's patch for
  80 ;;; bug 191-b ca. sbcl-0.7.22, these limitations should be enforced.
  81 (labels ((coerce-to-boolean (x)
  82            (if x t nil))
  83          (%like-or-dislike (expr expected-failure-p)
  84            (declare (type boolean expected-failure-p))
  85            (format t "~&trying ~S~%" expr)
  86            (multiple-value-bind (fun warnings-p failure-p)
  87              (compile nil
  88                       `(lambda ()
  89                          ,expr))
  90              (declare (ignore fun))
  91              ;; In principle the constraint on WARNINGS-P below seems
  92              ;; reasonable, but in practice we get warnings about
  93              ;; undefined functions from the DEFGENERICs, apparently
  94              ;; because the DECLAIMs which ordinarily prevent such
  95              ;; warnings don't take effect because EVAL-WHEN
  96              ;; (:COMPILE-TOPLEVEL) loses its magic when compiled
  97              ;; within a LAMBDA. So maybe we can't test WARNINGS-P
  98              ;; after all?
  99              ;;(unless expected-failure-p
 100              ;;  (assert (not warnings-p)))
 101              (assert (eq (coerce-to-boolean failure-p) expected-failure-p))))
 102          (like (expr)
 103            (%like-or-dislike expr nil))
 104          (dislike (expr)
 105            (%like-or-dislike expr t)))
 106   ;; basic sanity
 107   (dislike '(defgeneric gf-for-ll-test-0 ("a" #p"b")))
 108   (like    '(defgeneric gf-for-ll-test-1 ()))
 109   (like    '(defgeneric gf-for-ll-test-2 (x)))
 110   ;; forbidden default or supplied-p for &OPTIONAL or &KEY arguments
 111   (dislike '(defgeneric gf-for-ll-test-3 (x &optional (y 0))))
 112   (like    '(defgeneric gf-for-ll-test-4 (x &optional y)))
 113   (dislike '(defgeneric gf-for-ll-test-5 (x y &key (z :z z-p))))
 114   (like    '(defgeneric gf-for-ll-test-6 (x y &key z)))
 115   (dislike '(defgeneric gf-for-ll-test-7 (x &optional (y 0) &key z)))
 116   (like    '(defgeneric gf-for-ll-test-8 (x &optional y &key z)))
 117   (dislike '(defgeneric gf-for-ll-test-9 (x &optional y &key (z :z))))
 118   (like    '(defgeneric gf-for-ll-test-10 (x &optional y &key z)))
 119   (dislike '(defgeneric gf-for-ll-test-11 (&optional &key (k :k k-p))))
 120   (like    '(defgeneric gf-for-ll-test-12 (&optional &key k)))
 121   ;; forbidden &AUX
 122   (dislike '(defgeneric gf-for-ll-test-13 (x y z &optional a &aux g h)))
 123   (like    '(defgeneric gf-for-ll-test-14 (x y z &optional a)))
 124   (dislike '(defgeneric gf-for-ll-test-bare-aux-1 (x &aux)))
 125   (like    '(defgeneric gf-for-ll-test-bare-aux-2 (x)))
 126   ;; also can't use bogoDEFMETHODish type-qualifier-ish decorations
 127   ;; on required arguments
 128   (dislike '(defgeneric gf-for-11-test-15 ((arg t))))
 129   (like '(defgeneric gf-for-11-test-16 (arg))))
 130
 131 ;;; structure-class tests setup
 132 (defclass structure-class-foo1 () () (:metaclass cl:structure-class))
 133 (defclass structure-class-foo2 (structure-class-foo1)
 134   () (:metaclass cl:structure-class))
 135
 136 ;;; standard-class tests setup
 137 (defclass standard-class-foo1 () () (:metaclass cl:standard-class))
 138 (defclass standard-class-foo2 (standard-class-foo1)
 139   () (:metaclass cl:standard-class))
 140
 141 (assert (typep (class-of (make-instance 'structure-class-foo1))
 142                'structure-class))
 143 (assert (typep (make-instance 'structure-class-foo1) 'structure-class-foo1))
 144 (assert (typep (make-instance 'standard-class-foo1) 'standard-class-foo1))
 145
 146 ;;; DEFGENERIC's blow-away-old-methods behavior is specified to have
 147 ;;; special hacks to distinguish between defined-with-DEFGENERIC-:METHOD
 148 ;;; methods and defined-with-DEFMETHOD methods, so that reLOADing
 149 ;;; DEFGENERIC-containing files does the right thing instead of
 150 ;;; randomly slicing your generic functions. (APD made this work
 151 ;;; in sbcl-0.7.0.2.)
 152 (defgeneric born-to-be-redefined (x)
 153   (:method ((x integer))
 154     'integer))
 155 (defmethod born-to-be-redefined ((x real))
 156   'real)
 157 (assert (eq (born-to-be-redefined 1) 'integer))
 158 (defgeneric born-to-be-redefined (x))
 159 (assert (eq (born-to-be-redefined 1) 'real)) ; failed until sbcl-0.7.0.2
 160 (defgeneric born-to-be-redefined (x)
 161   (:method ((x integer))
 162     'integer))
 163 (defmethod born-to-be-redefined ((x integer))
 164   'int)
 165 (assert (eq (born-to-be-redefined 1) 'int))
 166 (defgeneric born-to-be-redefined (x))
 167 (assert (eq (born-to-be-redefined 1) 'int))
 168 \f
 169 ;;; In the removal of ITERATE from SB-PCL, a bug was introduced
 170 ;;; preventing forward-references and also change-class (which
 171 ;;; forward-references used interally) from working properly.  One
 172 ;;; symptom was reported by Brian Spilsbury (sbcl-devel 2002-04-08),
 173 ;;; and another on IRC by Dan Barlow simultaneously.  Better check
 174 ;;; that it doesn't happen again.
 175 ;;;
 176 ;;; First, the forward references:
 177 (defclass a (b) ())
 178 (defclass b () ())
 179 ;;; Then change-class
 180 (defclass class-with-slots ()
 181   ((a-slot :initarg :a-slot :accessor a-slot)
 182    (b-slot :initarg :b-slot :accessor b-slot)
 183    (c-slot :initarg :c-slot :accessor c-slot)))
 184 (let ((foo (make-instance 'class-with-slots
 185                           :a-slot 1
 186                           :b-slot 2
 187                           :c-slot 3)))
 188   (let ((bar (change-class foo 'class-with-slots)))
 189     (assert (= (a-slot bar) 1))
 190     (assert (= (b-slot bar) 2))
 191     (assert (= (c-slot bar) 3))))
 192
 193 ;;; some more CHANGE-CLASS testing, now that we have an ANSI-compliant
 194 ;;; version (thanks to Espen Johnsen)
 195 (defclass from-class ()
 196   ((foo :initarg :foo :accessor foo)))
 197 (defclass to-class ()
 198   ((foo :initarg :foo :accessor foo)
 199    (bar :initarg :bar :accessor bar)))
 200 (let* ((from (make-instance 'from-class :foo 1))
 201        (to (change-class from 'to-class :bar 2)))
 202   (assert (= (foo to) 1))
 203   (assert (= (bar to) 2)))
 204
 205 ;;; Until Pierre Mai's patch (sbcl-devel 2002-06-18, merged in
 206 ;;; sbcl-0.7.4.39) the :MOST-SPECIFIC-LAST option had no effect.
 207 (defgeneric bug180 (x)
 208   (:method-combination list :most-specific-last))
 209 (defmethod bug180 list ((x number))
 210   'number)
 211 (defmethod bug180 list ((x fixnum))
 212   'fixnum)
 213 (assert (equal (bug180 14) '(number fixnum)))
 214 \f
 215 ;;; printing a structure class should not loop indefinitely (or cause
 216 ;;; a stack overflow):
 217 (defclass test-printing-structure-class ()
 218   ((slot :initarg :slot))
 219   (:metaclass structure-class))
 220 (print (make-instance 'test-printing-structure-class :slot 2))
 221
 222 ;;; structure-classes should behave nicely when subclassed
 223 (defclass super-structure ()
 224   ((a :initarg :a :accessor a-accessor)
 225    (b :initform 2 :reader b-reader))
 226   (:metaclass structure-class))
 227 (defclass sub-structure (super-structure)
 228   ((c :initarg :c :writer c-writer :accessor c-accessor))
 229   (:metaclass structure-class))
 230 (let ((foo (make-instance 'sub-structure :a 1 :c 3)))
 231   (assert (= (a-accessor foo) 1))
 232   (assert (= (b-reader foo) 2))
 233   (assert (= (c-accessor foo) 3))
 234   (setf (a-accessor foo) 4)
 235   (c-writer 5 foo)
 236   (assert (= (a-accessor foo) 4))
 237   (assert (= (c-accessor foo) 5)))
 238 \f
 239 ;;; At least as of sbcl-0.7.4, PCL has code to support a special
 240 ;;; encoding of effective method functions for slot accessors as
 241 ;;; FIXNUMs. Given this special casing, it'd be easy for slot accessor
 242 ;;; functions to get broken in special ways even though ordinary
 243 ;;; generic functions work. As of sbcl-0.7.4 we didn't have any tests
 244 ;;; for that possibility. Now we have a few tests:
 245 (defclass fish ()
 246   ((fin :reader ffin :writer ffin!)
 247    (tail :reader ftail :writer ftail!)))
 248 (defvar *fish* (make-instance 'fish))
 249 (ffin! 'triangular-fin *fish*)
 250 (defclass cod (fish) ())
 251 (defvar *cod* (make-instance 'cod))
 252 (defparameter *clos-dispatch-side-fx* (make-array 0 :fill-pointer 0))
 253 (defmethod ffin! (new-fin (cod cod))
 254   (format t "~&about to set ~S fin to ~S~%" cod new-fin)
 255   (vector-push-extend '(cod) *clos-dispatch-side-fx*)
 256   (prog1
 257       (call-next-method)
 258     (format t "~&done setting ~S fin to ~S~%" cod new-fin)))
 259 (defmethod ffin! :before (new-fin (cod cod))
 260   (vector-push-extend '(:before cod) *clos-dispatch-side-fx*)
 261   (format t "~&exploring the CLOS dispatch zoo with COD fins~%"))
 262 (ffin! 'almost-triang-fin *cod*)
 263 (assert (eq (ffin *cod*) 'almost-triang-fin))
 264 (assert (equalp #((:before cod) (cod)) *clos-dispatch-side-fx*))
 265 \f
 266 ;;; Until sbcl-0.7.6.21, the long form of DEFINE-METHOD-COMBINATION
 267 ;;; ignored its options; Gerd Moellmann found and fixed the problem
 268 ;;; for cmucl (cmucl-imp 2002-06-18).
 269 (define-method-combination test-mc (x)
 270   ;; X above being a method-group-specifier
 271   ((primary () :required t))
 272   `(call-method ,(first primary)))
 273
 274 (defgeneric gf (obj)
 275   (:method-combination test-mc 1))
 276
 277 (defmethod gf (obj)
 278   obj)
 279 \f
 280 ;;;; success
 281
 282 (sb-ext:quit :unix-status 104)