tests/condition.impure.lisp

   1 ;;;; This software is part of the SBCL system. See the README file for
   2 ;;;; more information.
   3 ;;;;
   4 ;;;; While most of SBCL is derived from the CMU CL system, the test
   5 ;;;; files (like this one) were written from scratch after the fork
   6 ;;;; from CMU CL.
   7 ;;;;
   8 ;;;; This software is in the public domain and is provided with
   9 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  10 ;;;; more information.
  11
  12 (cl:in-package :cl-user)
  13
  14 ;;; Bug from CLOCC.
  15 (defpackage :p1
  16   (:use :cl)
  17   (:export #:code #:code-msg #:%code-msg))
  18 (in-package :p1)
  19 (define-condition code ()
  20   ((msg :reader code-msg :reader %code-msg :initarg :msg)))
  21
  22 (defpackage :p2
  23   (:use :cl :p1))
  24 (in-package :p2)
  25 (define-condition code1 (code)
  26   ((msg :accessor code-msg :initarg :msg)))
  27
  28 (let ((code (make-condition 'code :msg 1)))
  29   (assert (typep code 'code))
  30   (assert (eql (code-msg code) 1))
  31   (assert (eql (%code-msg code) 1)))
  32 (let ((code (make-condition 'code1 :msg 1)))
  33   (assert (typep code 'code))
  34   (assert (eql (code-msg code) 1))
  35   (assert (eql (%code-msg code) 1))
  36   (setf (code-msg code) 2)
  37   (assert (eql (code-msg code) 2))
  38   (assert (eql (%code-msg code) 1)))
  39
  40 ;;; Check that initializing the condition class metaobject doesn't create
  41 ;;; any instances. Reported by Marco Baringer on sbcl-devel Mon, 05 Jul 2004.
  42 (defvar *condition-count* 0)
  43 (define-condition counted-condition () ((slot :initform (incf *condition-count*))))
  44 (defmethod frob-counted-condition ((x counted-condition)) x)
  45 (assert (= 0 *condition-count*))
  46 (assert (typep (sb-mop:class-prototype (find-class 'counted-condition))
  47                '(and condition counted-condition)))
  48
  49 (define-condition picky-condition () ())
  50 (restart-case
  51     (handler-case
  52         (error 'picky-condition)
  53       (picky-condition (c)
  54         (assert (eq (car (compute-restarts)) (car (compute-restarts c))))))
  55   (picky-restart ()
  56     :report "Do nothing."
  57     :test (lambda (c)
  58             (typep c '(or null picky-condition)))
  59     'ok))
  60
  61 ;;; adapted from Helmut Eller on cmucl-imp
  62 (assert (eq 'it
  63             (restart-case
  64                 (handler-case
  65                     (error 'picky-condition)
  66                   (picky-condition (c)
  67                     (invoke-restart (find-restart 'give-it c))))
  68               (give-it ()
  69                 :test (lambda (c) (typep c 'picky-condition))
  70                 'it))))
  71
  72 ;;; In sbcl-1.0.9, a condition derived from CL:STREAM-ERROR (or
  73 ;;; CL:READER-ERROR or or CL:PARSE-ERROR) didn't inherit a usable
  74 ;;; PRINT-OBJECT method --- the PRINT-OBJECT code implicitly assumed
  75 ;;; that CL:STREAM-ERROR was like a SIMPLE-CONDITION, with args and
  76 ;;; format control, which seems to be a preANSIism.
  77 ;;;
  78 ;;; (The spec for DEFINE-CONDITION says that if :REPORT is not
  79 ;;; supplied, "information about how to report this type of condition
  80 ;;; is inherited from the PARENT-TYPE." The spec doesn't explicitly
  81 ;;; forbid the inherited printer from trying to read slots which
  82 ;;; aren't portably specified for the condition, but it doesn't seem
  83 ;;; reasonable for the inherited printer to do so. It does seem
  84 ;;; reasonable for app code to derive a new condition from
  85 ;;; CL:READER-ERROR (perhaps for an error in a readmacro) or
  86 ;;; CL:PARSE-ERROR (perhaps for an error in an operator
  87 ;;; READ-MY-FAVORITE-DATA-STRUCTURE) or CL:STREAM-ERROR (dunno why
  88 ;;; offhand, but perhaps for some Gray-stream-ish reason), not define
  89 ;;; a :REPORT method for its new condition, and expect to inherit from
  90 ;;; the application's printer all the cruft required for describing
  91 ;;; the location of the error in the input.)
  92 (define-condition my-stream-error-1-0-9 (stream-error) ())
  93 (define-condition parse-foo-error-1-0-9 (parse-error) ())
  94 (define-condition read-bar-error-1-0-9 (reader-error) ())
  95 (let (;; instances created initializing all the slots specified in
  96       ;; ANSI CL
  97       (parse-foo-error-1-0-9 (make-condition 'parse-foo-error-1-0-9
  98                                              :stream *standard-input*))
  99       (read-foo-error-1-0-9 (make-condition 'read-bar-error-1-0-9
 100                                             :stream *standard-input*))
 101       (my-stream-error-1-0-9 (make-condition 'my-stream-error-1-0-9
 102                                              :stream *standard-input*)))
 103   ;; should be printable
 104   (dolist (c (list
 105               my-stream-error-1-0-9
 106               parse-foo-error-1-0-9
 107               read-foo-error-1-0-9))
 108     ;; whether escaped or not
 109     (dolist (*print-escape* '(nil t))
 110       (write c :stream (make-string-output-stream)))))
 111
 112 ;;; Reported by Michael Weber: restart computation in :TEST-FUNCTION used to
 113 ;;; cause infinite recursion.
 114 (defun restart-test-finds-restarts ()
 115   (restart-bind
 116       ((bar (lambda ()
 117               (return-from restart-test-finds-restarts 42))
 118          :test-function
 119          (lambda (condition)
 120            (find-restart 'qux))))
 121     (when (find-restart 'bar)
 122       (invoke-restart 'bar))))
 123 (assert (not (restart-test-finds-restarts)))