tests/mop-25.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 ;;; be sure that the :FUNCTION initarg to initialize methods overrides
  15 ;;; any system-provided function.
  16
  17 (defpackage "MOP-25"
  18   (:use "CL" "SB-MOP"))
  19
  20 (in-package "MOP-25")
  21
  22 (defclass typechecking-reader-method (standard-reader-method)
  23   ())
  24
  25 (defmethod initialize-instance
  26     ((method typechecking-reader-method) &rest initargs &key slot-definition)
  27   (let ((name (slot-definition-name slot-definition))
  28         (type (slot-definition-type slot-definition)))
  29     (apply #'call-next-method method
  30            :function #'(lambda (args next-methods)
  31                          (declare (ignore next-methods))
  32                          (apply #'(lambda (instance)
  33                                     (let ((value (slot-value instance name)))
  34                                       (unless (typep value type)
  35                                         (error "Slot ~S of ~S is not of type ~S: ~S"
  36                                                name instance type value))
  37                                       value))
  38                                 args))
  39            initargs)))
  40 (defclass typechecking-reader-class (standard-class)
  41   ())
  42
  43 (defmethod validate-superclass ((c1 typechecking-reader-class) (c2 standard-class))
  44   t)
  45
  46 (defmethod reader-method-class
  47     ((class typechecking-reader-class) direct-slot &rest args)
  48   (find-class 'typechecking-reader-method))
  49
  50 (defclass testclass25 ()
  51   ((pair :type (cons symbol (cons symbol null)) :initarg :pair :accessor testclass25-pair))
  52   (:metaclass typechecking-reader-class))
  53
  54 (assert (equal '(t t t nil t)
  55                (macrolet ((succeeds (form)
  56                             `(not (nth-value 1 (ignore-errors ,form)))))
  57                  (let ((p (list 'abc 'def))
  58                        (x (make-instance 'testclass25)))
  59                    (list (succeeds (make-instance 'testclass25 :pair '(seventeen 17)))
  60                          (succeeds (setf (testclass25-pair x) p))
  61                          (succeeds (setf (second p) 456))
  62                          (succeeds (testclass25-pair x))
  63                          (succeeds (slot-value x 'pair)))))))