File: mop-13.impure-cload.lisp

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;;;; miscellaneous side-effectful tests of the MOP

;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; While most of SBCL is derived from the CMU CL system, the test
;;;; files (like this one) were written from scratch after the fork
;;;; from CMU CL.
;;;;
;;;; This software is in the public domain and is provided with
;;;; absolutely no warranty. See the COPYING and CREDITS files for
;;;; more information.

;;; this file attempts to test possible metacircularity issues arising
;;; from adding slots to generic functions in odd places.

(defpackage "MOP-13"
  (:use "CL" "SB-MOP"))

(in-package "MOP-13")

(defclass super-funcallable-mixin ()
  ((abc :accessor abc :initarg :abc))
  (:metaclass funcallable-standard-class))

(defclass sub-generic-function1 (standard-generic-function
                                 super-funcallable-mixin) ()
  (:metaclass funcallable-standard-class))

(defclass sub-method1 (standard-method) ())

(defgeneric myfun1 (a b)
  (:generic-function-class sub-generic-function1)
  (:method-class sub-method1))

(defvar *count1* 0)

(defmethod myfun1 (a b)
  (incf *count1*))

(myfun1 2 3)
(assert (= *count1* 1))
(myfun1 t nil)
(assert (= *count1* 2))

(defmethod myfun1 ((a integer) (b integer))
  (incf *count1* 2))

(myfun1 2 3)
(assert (= *count1* 4))
(myfun1 t nil)
(assert (= *count1* 5))

;;; Friendlier superclass order test case
(defclass sub-generic-function2 (super-funcallable-mixin
                                 standard-generic-function) ()
  (:metaclass funcallable-standard-class))

(defclass sub-method2 (standard-method) ())

(defgeneric myfun2 (a b)
  (:generic-function-class sub-generic-function2)
  (:method-class sub-method2))

(defvar *count2* 0)

(defmethod myfun2 (a b)
  (incf *count2*))

(myfun2 2 3)
(assert (= *count2* 1))
(myfun2 t nil)
(assert (= *count2* 2))

(defmethod myfun2 ((a integer) (b integer))
  (incf *count2* 2))

(myfun2 2 3)
(assert (= *count2* 4))
(myfun2 t nil)
(assert (= *count2* 5))