;;;; miscellaneous side-effectful tests of CLOS ;;;; 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. (defpackage "FOO" (:use "CL")) (in-package "FOO") ;;; It should be possible to do DEFGENERIC and DEFMETHOD referring to ;;; structure types defined earlier in the file. (defstruct struct-a x y) (defstruct struct-b x y z) (defmethod wiggle ((a struct-a)) (+ (struct-a-x a) (struct-a-y a))) (defgeneric jiggle ((arg t))) (defmethod jiggle ((a struct-a)) (- (struct-a-x a) (struct-a-y a))) (defmethod jiggle ((b struct-b)) (- (struct-b-x b) (struct-b-y b) (struct-b-z b))) (assert (= (wiggle (make-struct-a :x 6 :y 5)) (jiggle (make-struct-b :x 19 :y 6 :z 2)))) ;;; Compiling DEFGENERIC should prevent "undefined function" style ;;; warnings from code within the same file. (defgeneric gf-defined-in-this-file ((x number) (y number))) (defun function-using-gf-defined-in-this-file (x y n) (unless (minusp n) (gf-defined-in-this-file x y))) ;;; Until Martin Atzmueller ported Pierre Mai's CMU CL fixes in ;;; sbcl-0.6.12.25, the implementation of NO-APPLICABLE-METHOD was ;;; broken in such a way that the code here would signal an error. (defgeneric zut-n-a-m (a b c)) (defmethod no-applicable-method ((zut-n-a-m (eql #'zut-n-a-m)) &rest args) (format t "~&No applicable method for ZUT-N-A-M ~S, yet.~%" args)) (zut-n-a-m 1 2 3) ;;; bug reported and fixed by Alexey Dejneka sbcl-devel 2001-09-10: ;;; This DEFGENERIC shouldn't cause an error. (defgeneric ad-gf (a) (:method :around (x) x)) ;;; DEFGENERIC and DEFMETHOD shouldn't accept &REST when it's not ;;; followed by a variable: ;;; e.g. (DEFMETHOD FOO ((X T) &REST) NIL) should signal an error. (eval-when (:load-toplevel :compile-toplevel :execute) (defmacro expect-error (&body body) `(multiple-value-bind (res condition) (ignore-errors (progn ,@body)) (declare (ignore res)) (typep condition 'error)))) (assert (expect-error (macroexpand-1 '(defmethod foo0 ((x t) &rest) nil)))) (assert (expect-error (defgeneric foo1 (x &rest)))) (assert (expect-error (defgeneric foo2 (x a &rest)))) (defgeneric foo3 (x &rest y)) (defmethod foo3 ((x t) &rest y) nil) (defmethod foo4 ((x t) &key y &rest z) nil) (defgeneric foo4 (x &key y &rest z)) (assert (expect-error (defgeneric foo5 (x &rest)))) (assert (expect-error (macroexpand-1 '(defmethod foo6 (x &rest))))) ;;; structure-class tests setup (defclass structure-class-foo1 () () (:metaclass cl:structure-class)) (defclass structure-class-foo2 (structure-class-foo1) () (:metaclass cl:structure-class)) ;;; standard-class tests setup (defclass standard-class-foo1 () () (:metaclass cl:standard-class)) (defclass standard-class-foo2 (standard-class-foo1) () (:metaclass cl:standard-class)) (assert (typep (class-of (make-instance 'structure-class-foo1)) 'structure-class)) (assert (typep (make-instance 'structure-class-foo1) 'structure-class-foo1)) (assert (typep (make-instance 'standard-class-foo1) 'standard-class-foo1)) ;;; DEFGENERIC's blow-away-old-methods behavior is specified to have ;;; special hacks to distinguish between defined-with-DEFGENERIC-:METHOD ;;; methods and defined-with-DEFMETHOD methods, so that reLOADing ;;; DEFGENERIC-containing files does the right thing instead of ;;; randomly slicing your generic functions. (APD made this work ;;; in sbcl-0.7.0.2.) (defgeneric born-to-be-redefined (x) (:method ((x integer)) 'integer)) (defmethod born-to-be-redefined ((x real)) 'real) (assert (eq (born-to-be-redefined 1) 'integer)) (defgeneric born-to-be-redefined (x)) (assert (eq (born-to-be-redefined 1) 'real)) ; failed until sbcl-0.7.0.2 (defgeneric born-to-be-redefined (x) (:method ((x integer)) 'integer)) (defmethod born-to-be-redefined ((x integer)) 'int) (assert (eq (born-to-be-redefined 1) 'int)) (defgeneric born-to-be-redefined (x)) (assert (eq (born-to-be-redefined 1) 'int)) ;;; In the removal of ITERATE from SB-PCL, a bug was introduced ;;; preventing forward-references and also change-class (which ;;; forward-references used interally) from working properly. One ;;; symptom was reported by Brian Spilsbury (sbcl-devel 2002-04-08), ;;; and another on IRC by Dan Barlow simultaneously. Better check ;;; that it doesn't happen again. ;;; ;;; First, the forward references: (defclass a (b) ()) (defclass b () ()) ;;; Then change-class (defclass class-with-slots () ((a-slot :initarg :a-slot :accessor a-slot) (b-slot :initarg :b-slot :accessor b-slot) (c-slot :initarg :c-slot :accessor c-slot))) (let ((foo (make-instance 'class-with-slots :a-slot 1 :b-slot 2 :c-slot 3))) (let ((bar (change-class foo 'class-with-slots))) (assert (= (a-slot bar) 1)) (assert (= (b-slot bar) 2)) (assert (= (c-slot bar) 3)))) ;;; some more CHANGE-CLASS testing, now that we have an ANSI-compliant ;;; version (thanks to Espen Johnsen) (defclass from-class () ((foo :initarg :foo :accessor foo))) (defclass to-class () ((foo :initarg :foo :accessor foo) (bar :initarg :bar :accessor bar))) (let* ((from (make-instance 'from-class :foo 1)) (to (change-class from 'to-class :bar 2))) (assert (= (foo to) 1)) (assert (= (bar to) 2))) ;;; Until Pierre Mai's patch (sbcl-devel 2002-06-18, merged in ;;; sbcl-0.7.4.39) the :MOST-SPECIFIC-LAST option had no effect. (defgeneric bug180 ((x t)) (:method-combination list :most-specific-last)) (defmethod bug180 list ((x number)) 'number) (defmethod bug180 list ((x fixnum)) 'fixnum) (assert (equal (bug180 14) '(number fixnum))) ;;; printing a structure class should not loop indefinitely (or cause ;;; a stack overflow): (defclass test-printing-structure-class () ((slot :initarg :slot)) (:metaclass structure-class)) (print (make-instance 'test-printing-structure-class :slot 2)) ;;; structure-classes should behave nicely when subclassed (defclass super-structure () ((a :initarg :a :accessor a-accessor) (b :initform 2 :reader b-reader)) (:metaclass structure-class)) (defclass sub-structure (super-structure) ((c :initarg :c :writer c-writer :accessor c-accessor)) (:metaclass structure-class)) (let ((foo (make-instance 'sub-structure :a 1 :c 3))) (assert (= (a-accessor foo) 1)) (assert (= (b-reader foo) 2)) (assert (= (c-accessor foo) 3)) (setf (a-accessor foo) 4) (c-writer 5 foo) (assert (= (a-accessor foo) 4)) (assert (= (c-accessor foo) 5))) ;;; At least as of sbcl-0.7.4, PCL has code to support a special ;;; encoding of effective method functions for slot accessors as ;;; FIXNUMs. Given this special casing, it'd be easy for slot accessor ;;; functions to get broken in special ways even though ordinary ;;; generic functions work. As of sbcl-0.7.4 we didn't have any tests ;;; for that possibility. Now we have a few tests: (defclass fish () ((fin :reader ffin :writer ffin!) (tail :reader ftail :writer ftail!))) (defvar *fish* (make-instance 'fish)) (ffin! 'triangular-fin *fish*) (defclass cod (fish) ()) (defvar *cod* (make-instance 'cod)) (defparameter *clos-dispatch-side-fx* (make-array 0 :fill-pointer 0)) (defmethod ffin! (new-fin (cod cod)) (format t "~&about to set ~S fin to ~S~%" cod new-fin) (vector-push-extend '(cod) *clos-dispatch-side-fx*) (prog1 (call-next-method) (format t "~&done setting ~S fin to ~S~%" cod new-fin))) (defmethod ffin! :before (new-fin (cod cod)) (vector-push-extend '(:before cod) *clos-dispatch-side-fx*) (format t "~&exploring the CLOS dispatch zoo with COD fins~%")) (ffin! 'almost-triang-fin *cod*) (assert (eq (ffin *cod*) 'almost-triang-fin)) (assert (equalp #((:before cod) (cod)) *clos-dispatch-side-fx*)) ;;;; success (sb-ext:quit :unix-status 104)