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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 tests the programmatic class example from pp.67-69 of
;;; AMOP.
(defpackage "MOP-17"
(:use "CL" "SB-MOP"))
(in-package "MOP-17")
(defun make-programmatic-instance (superclass-names &rest initargs)
(apply #'make-instance
(find-programmatic-class
(mapcar #'find-class superclass-names))
initargs))
(defun find-programmatic-class (superclasses)
(let ((class (find-if
(lambda (class)
(equal superclasses
(class-direct-superclasses class)))
(class-direct-subclasses (car superclasses)))))
(or class
(make-programmatic-class superclasses))))
(defun make-programmatic-class (superclasses)
(make-instance 'standard-class
:name (mapcar #'class-name superclasses)
:direct-superclasses superclasses
:direct-slots '()))
(defclass shape () ())
(defclass circle (shape) ())
(defclass color () ())
(defclass orange (color) ())
(defclass magenta (color) ())
(defclass label-type () ())
(defclass top-labeled (label-type) ())
(defclass bottom-labeled (label-type) ())
(assert (null (class-direct-subclasses (find-class 'circle))))
(defvar *i1* (make-programmatic-instance '(circle orange top-labeled)))
(defvar *i2* (make-programmatic-instance '(circle magenta bottom-labeled)))
(defvar *i3* (make-programmatic-instance '(circle orange top-labeled)))
(assert (not (eq *i1* *i3*)))
(assert (= (length (class-direct-subclasses (find-class 'circle))) 2))
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