1 ;;;; stuff originally from CMU CL's error.lisp which can or should
2 ;;;; come late (mostly related to the CONDITION class itself)
5 ;;;; This software is part of the SBCL system. See the README file for
8 ;;;; This software is derived from the CMU CL system, which was
9 ;;;; written at Carnegie Mellon University and released into the
10 ;;;; public domain. The software is in the public domain and is
11 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
12 ;;;; files for more information.
14 (in-package "SB!KERNEL")
16 ;;;; miscellaneous support utilities
18 ;;; Signalling an error when trying to print an error condition is
19 ;;; generally a PITA, so whatever the failure encountered when
20 ;;; wondering about FILE-POSITION within a condition printer, 'tis
21 ;;; better silently to give up than to try to complain.
22 (defun file-position-or-nil-for-error (stream &optional (pos nil posp))
23 ;; Arguably FILE-POSITION shouldn't be signalling errors at all; but
24 ;; "NIL if this cannot be determined" in the ANSI spec doesn't seem
25 ;; absolutely unambiguously to prohibit errors when, e.g., STREAM
26 ;; has been closed so that FILE-POSITION is a nonsense question. So
27 ;; my (WHN) impression is that the conservative approach is to
28 ;; IGNORE-ERRORS. (I encountered this failure from within a homebrew
29 ;; defsystemish operation where the ERROR-STREAM had been CL:CLOSEd,
30 ;; I think by nonlocally exiting through a WITH-OPEN-FILE, by the
31 ;; time an error was reported.)
33 (ignore-errors (file-position stream pos))
34 (ignore-errors (file-position stream))))
36 ;;;; the CONDITION class
38 (/show0 "condition.lisp 20")
40 (eval-when (:compile-toplevel :load-toplevel :execute)
42 (/show0 "condition.lisp 24")
44 (def!struct (condition-classoid (:include classoid)
45 (:constructor make-condition-classoid))
46 ;; list of CONDITION-SLOT structures for the direct slots of this
48 (slots nil :type list)
49 ;; list of CONDITION-SLOT structures for all of the effective class
50 ;; slots of this class
51 (class-slots nil :type list)
52 ;; report function or NIL
53 (report nil :type (or function null))
54 ;; list of alternating initargs and initforms
55 (default-initargs () :type list)
56 ;; class precedence list as a list of CLASS objects, with all
57 ;; non-CONDITION classes removed
59 ;; a list of all the effective instance allocation slots of this
60 ;; class that have a non-constant initform or default-initarg.
61 ;; Values for these slots must be computed in the dynamic
62 ;; environment of MAKE-CONDITION.
63 (hairy-slots nil :type list))
65 (/show0 "condition.lisp 49")
69 (!defstruct-with-alternate-metaclass condition
70 :slot-names (actual-initargs assigned-slots)
71 :boa-constructor %make-condition-object
73 :metaclass-name condition-classoid
74 :metaclass-constructor make-condition-classoid
77 (defun make-condition-object (actual-initargs)
78 (%make-condition-object actual-initargs nil))
80 (defstruct (condition-slot (:copier nil))
81 (name (missing-arg) :type symbol)
82 ;; list of all applicable initargs
83 (initargs (missing-arg) :type list)
84 ;; names of reader and writer functions
85 (readers (missing-arg) :type list)
86 (writers (missing-arg) :type list)
87 ;; true if :INITFORM was specified
88 (initform-p (missing-arg) :type (member t nil))
89 ;; If this is a function, call it with no args. Otherwise, it's the
91 (initform (missing-arg) :type t)
92 ;; allocation of this slot, or NIL until defaulted
93 (allocation nil :type (member :instance :class nil))
94 ;; If ALLOCATION is :CLASS, this is a cons whose car holds the value.
95 (cell nil :type (or cons null))
97 (documentation nil :type (or string null)))
99 ;;; KLUDGE: It's not clear to me why CONDITION-CLASS has itself listed
100 ;;; in its CPL, while other classes derived from CONDITION-CLASS don't
101 ;;; have themselves listed in their CPLs. This behavior is inherited
102 ;;; from CMU CL, and didn't seem to be explained there, and I haven't
103 ;;; figured out whether it's right. -- WHN 19990612
104 (eval-when (:compile-toplevel :load-toplevel :execute)
105 (/show0 "condition.lisp 103")
106 (let ((condition-class (locally
107 ;; KLUDGE: There's a DEFTRANSFORM
108 ;; FIND-CLASSOID for constant class names
109 ;; which creates fast but
110 ;; non-cold-loadable, non-compact code. In
111 ;; this context, we'd rather have compact,
112 ;; cold-loadable code. -- WHN 19990928
113 (declare (notinline find-classoid))
114 (find-classoid 'condition))))
115 (setf (condition-classoid-cpl condition-class)
116 (list condition-class)))
117 (/show0 "condition.lisp 103"))
119 (setf (condition-classoid-report (locally
120 ;; KLUDGE: There's a DEFTRANSFORM
121 ;; FIND-CLASSOID for constant class
122 ;; names which creates fast but
123 ;; non-cold-loadable, non-compact
124 ;; code. In this context, we'd
125 ;; rather have compact,
126 ;; cold-loadable code. -- WHN
128 (declare (notinline find-classoid))
129 (find-classoid 'condition)))
130 (lambda (cond stream)
131 (format stream "Condition ~S was signalled." (type-of cond))))
133 (eval-when (:compile-toplevel :load-toplevel :execute)
135 (defun find-condition-layout (name parent-types)
136 (let* ((cpl (remove-duplicates
140 (condition-classoid-cpl
143 (cond-layout (info :type :compiler-layout 'condition))
144 (olayout (info :type :compiler-layout name))
145 ;; FIXME: Does this do the right thing in case of multiple
146 ;; inheritance? A quick look at DEFINE-CONDITION didn't make
147 ;; it obvious what ANSI intends to be done in the case of
148 ;; multiple inheritance, so it's not actually clear what the
151 (order-layout-inherits (concatenate 'simple-vector
152 (layout-inherits cond-layout)
153 (mapcar #'classoid-layout cpl)))))
155 (not (mismatch (layout-inherits olayout) new-inherits)))
157 (make-layout :classoid (make-undefined-classoid name)
158 :inherits new-inherits
160 :length (layout-length cond-layout)))))
164 ;;; FIXME: ANSI's definition of DEFINE-CONDITION says
165 ;;; Condition reporting is mediated through the PRINT-OBJECT method
166 ;;; for the condition type in question, with *PRINT-ESCAPE* always
167 ;;; being nil. Specifying (:REPORT REPORT-NAME) in the definition of
168 ;;; a condition type C is equivalent to:
169 ;;; (defmethod print-object ((x c) stream)
170 ;;; (if *print-escape* (call-next-method) (report-name x stream)))
171 ;;; The current code doesn't seem to quite match that.
172 (def!method print-object ((x condition) stream)
174 (if (and (typep x 'simple-condition) (slot-value x 'format-control))
175 (print-unreadable-object (x stream :type t :identity t)
176 (write (simple-condition-format-control x)
179 (print-unreadable-object (x stream :type t :identity t)))
180 ;; KLUDGE: A comment from CMU CL here said
181 ;; 7/13/98 BUG? CPL is not sorted and results here depend on order of
182 ;; superclasses in define-condition call!
183 (dolist (class (condition-classoid-cpl (classoid-of x))
184 (error "no REPORT? shouldn't happen!"))
185 (let ((report (condition-classoid-report class)))
187 (return (funcall report x stream)))))))
189 ;;;; slots of CONDITION objects
191 (defvar *empty-condition-slot* '(empty))
193 (defun find-slot-default (class slot)
194 (let ((initargs (condition-slot-initargs slot))
195 (cpl (condition-classoid-cpl class)))
197 (let ((default-initargs (condition-classoid-default-initargs class)))
198 (dolist (initarg initargs)
199 (let ((val (getf default-initargs initarg *empty-condition-slot*)))
200 (unless (eq val *empty-condition-slot*)
201 (return-from find-slot-default
206 (if (condition-slot-initform-p slot)
207 (let ((initform (condition-slot-initform slot)))
208 (if (functionp initform)
211 (error "unbound condition slot: ~S" (condition-slot-name slot)))))
213 (defun find-condition-class-slot (condition-class slot-name)
215 (condition-classoid-cpl condition-class)
216 (error "There is no slot named ~S in ~S."
217 slot-name condition-class))
218 (dolist (slot (condition-classoid-slots sclass))
219 (when (eq (condition-slot-name slot) slot-name)
220 (return-from find-condition-class-slot slot)))))
222 (defun condition-writer-function (condition new-value name)
223 (dolist (cslot (condition-classoid-class-slots
224 (layout-classoid (%instance-layout condition)))
225 (setf (getf (condition-assigned-slots condition) name)
227 (when (eq (condition-slot-name cslot) name)
228 (return (setf (car (condition-slot-cell cslot)) new-value)))))
230 (defun condition-reader-function (condition name)
231 (let ((class (layout-classoid (%instance-layout condition))))
232 (dolist (cslot (condition-classoid-class-slots class))
233 (when (eq (condition-slot-name cslot) name)
234 (return-from condition-reader-function
235 (car (condition-slot-cell cslot)))))
236 (let ((val (getf (condition-assigned-slots condition) name
237 *empty-condition-slot*)))
238 (if (eq val *empty-condition-slot*)
239 (let ((actual-initargs (condition-actual-initargs condition))
240 (slot (find-condition-class-slot class name)))
242 (error "missing slot ~S of ~S" name condition))
243 (do ((initargs actual-initargs (cddr initargs)))
245 (setf (getf (condition-assigned-slots condition) name)
246 (find-slot-default class slot)))
247 (when (member (car initargs) (condition-slot-initargs slot))
248 (return-from condition-reader-function
249 (setf (getf (condition-assigned-slots condition)
256 (defun make-condition (type &rest args)
258 "Make an instance of a condition object using the specified initargs."
259 ;; Note: ANSI specifies no exceptional situations in this function.
260 ;; signalling simple-type-error would not be wrong.
261 (let* ((type (or (and (symbolp type) (find-classoid type nil))
263 (class (typecase type
264 (condition-classoid type)
267 (return-from make-condition
268 (apply #'make-instance type args)))
270 (error 'simple-type-error
272 :expected-type 'condition-class
273 :format-control "~S is not a condition class."
274 :format-arguments (list type)))
276 (error 'simple-type-error
278 :expected-type 'condition-class
280 "~s doesn't designate a condition class."
281 :format-arguments (list type)))))
282 (res (make-condition-object args)))
283 (setf (%instance-layout res) (classoid-layout class))
284 ;; Set any class slots with initargs present in this call.
285 (dolist (cslot (condition-classoid-class-slots class))
286 (dolist (initarg (condition-slot-initargs cslot))
287 (let ((val (getf args initarg *empty-condition-slot*)))
288 (unless (eq val *empty-condition-slot*)
289 (setf (car (condition-slot-cell cslot)) val)))))
290 ;; Default any slots with non-constant defaults now.
291 (dolist (hslot (condition-classoid-hairy-slots class))
292 (when (dolist (initarg (condition-slot-initargs hslot) t)
293 (unless (eq (getf args initarg *empty-condition-slot*)
294 *empty-condition-slot*)
296 (setf (getf (condition-assigned-slots res) (condition-slot-name hslot))
297 (find-slot-default class hslot))))
300 ;;;; DEFINE-CONDITION
302 (eval-when (:compile-toplevel :load-toplevel :execute)
303 (defun %compiler-define-condition (name direct-supers layout
304 all-readers all-writers)
305 (with-single-package-locked-error
306 (:symbol name "defining ~A as a condition")
307 (sb!xc:proclaim `(ftype (function (t) t) ,@all-readers))
308 (sb!xc:proclaim `(ftype (function (t t) t) ,@all-writers))
309 (multiple-value-bind (class old-layout)
310 (insured-find-classoid name
311 #'condition-classoid-p
312 #'make-condition-classoid)
313 (setf (layout-classoid layout) class)
314 (setf (classoid-direct-superclasses class)
315 (mapcar #'find-classoid direct-supers))
316 (cond ((not old-layout)
317 (register-layout layout))
318 ((not *type-system-initialized*)
319 (setf (layout-classoid old-layout) class)
320 (setq layout old-layout)
321 (unless (eq (classoid-layout class) layout)
322 (register-layout layout)))
323 ((redefine-layout-warning "current"
326 (layout-length layout)
327 (layout-inherits layout)
328 (layout-depthoid layout)
329 (layout-n-untagged-slots layout))
330 (register-layout layout :invalidate t))
331 ((not (classoid-layout class))
332 (register-layout layout)))
334 (setf (layout-info layout)
336 ;; KLUDGE: There's a FIND-CLASS DEFTRANSFORM for constant class
337 ;; names which creates fast but non-cold-loadable, non-compact
338 ;; code. In this context, we'd rather have compact, cold-loadable
339 ;; code. -- WHN 19990928
340 (declare (notinline find-classoid))
341 (layout-info (classoid-layout (find-classoid 'condition)))))
343 (setf (find-classoid name) class)
345 ;; Initialize CPL slot.
346 (setf (condition-classoid-cpl class)
347 (remove-if-not #'condition-classoid-p
348 (std-compute-class-precedence-list class)))))
352 ;;; Compute the effective slots of CLASS, copying inherited slots and
353 ;;; destructively modifying direct slots.
355 ;;; FIXME: It'd be nice to explain why it's OK to destructively modify
356 ;;; direct slots. Presumably it follows from the semantics of
357 ;;; inheritance and redefinition of conditions, but finding the cite
358 ;;; and documenting it here would be good. (Or, if this is not in fact
359 ;;; ANSI-compliant, fixing it would also be good.:-)
360 (defun compute-effective-slots (class)
361 (collect ((res (copy-list (condition-classoid-slots class))))
362 (dolist (sclass (cdr (condition-classoid-cpl class)))
363 (dolist (sslot (condition-classoid-slots sclass))
364 (let ((found (find (condition-slot-name sslot) (res)
365 :key #'condition-slot-name)))
367 (setf (condition-slot-initargs found)
368 (union (condition-slot-initargs found)
369 (condition-slot-initargs sslot)))
370 (unless (condition-slot-initform-p found)
371 (setf (condition-slot-initform-p found)
372 (condition-slot-initform-p sslot))
373 (setf (condition-slot-initform found)
374 (condition-slot-initform sslot)))
375 (unless (condition-slot-allocation found)
376 (setf (condition-slot-allocation found)
377 (condition-slot-allocation sslot))))
379 (res (copy-structure sslot)))))))
382 ;;; Early definitions of slot accessor creators.
384 ;;; Slot accessors must be generic functions, but ANSI does not seem
385 ;;; to specify any of them, and we cannot support it before end of
386 ;;; warm init. So we use ordinary functions inside SBCL, and switch to
387 ;;; GFs only at the end of building.
388 (declaim (notinline install-condition-slot-reader
389 install-condition-slot-writer))
390 (defun install-condition-slot-reader (name condition slot-name)
391 (declare (ignore condition))
392 (setf (fdefinition name)
394 (condition-reader-function condition slot-name))))
395 (defun install-condition-slot-writer (name condition slot-name)
396 (declare (ignore condition))
397 (setf (fdefinition name)
398 (lambda (new-value condition)
399 (condition-writer-function condition new-value slot-name))))
401 (defvar *define-condition-hooks* nil)
403 (defun %set-condition-report (name report)
404 (setf (condition-classoid-report (find-classoid name))
407 (defun %define-condition (name parent-types layout slots documentation
408 default-initargs all-readers all-writers
410 (with-single-package-locked-error
411 (:symbol name "defining ~A as a condition")
412 (%compiler-define-condition name parent-types layout all-readers all-writers)
413 (sb!c:with-source-location (source-location)
414 (setf (layout-source-location layout)
416 (let ((class (find-classoid name)))
417 (setf (condition-classoid-slots class) slots)
418 (setf (condition-classoid-default-initargs class) default-initargs)
419 (setf (fdocumentation name 'type) documentation)
423 ;; Set up reader and writer functions.
424 (let ((slot-name (condition-slot-name slot)))
425 (dolist (reader (condition-slot-readers slot))
426 (install-condition-slot-reader reader name slot-name))
427 (dolist (writer (condition-slot-writers slot))
428 (install-condition-slot-writer writer name slot-name))))
430 ;; Compute effective slots and set up the class and hairy slots
431 ;; (subsets of the effective slots.)
432 (let ((eslots (compute-effective-slots class))
435 (mapcar #'condition-classoid-default-initargs
436 (condition-classoid-cpl class)))))
437 (dolist (slot eslots)
438 (ecase (condition-slot-allocation slot)
440 (unless (condition-slot-cell slot)
441 (setf (condition-slot-cell slot)
442 (list (if (condition-slot-initform-p slot)
443 (let ((initform (condition-slot-initform slot)))
444 (if (functionp initform)
447 *empty-condition-slot*))))
448 (push slot (condition-classoid-class-slots class)))
450 (setf (condition-slot-allocation slot) :instance)
451 (when (or (functionp (condition-slot-initform slot))
452 (dolist (initarg (condition-slot-initargs slot) nil)
453 (when (functionp (getf e-def-initargs initarg))
455 (push slot (condition-classoid-hairy-slots class)))))))
456 (when (boundp '*define-condition-hooks*)
457 (dolist (fun *define-condition-hooks*)
458 (funcall fun class))))
461 (defmacro define-condition (name (&rest parent-types) (&rest slot-specs)
464 "DEFINE-CONDITION Name (Parent-Type*) (Slot-Spec*) Option*
465 Define NAME as a condition type. This new type inherits slots and its
466 report function from the specified PARENT-TYPEs. A slot spec is a list of:
467 (slot-name :reader <rname> :initarg <iname> {Option Value}*
469 The DEFINE-CLASS slot options :ALLOCATION, :INITFORM, [slot] :DOCUMENTATION
470 and :TYPE and the overall options :DEFAULT-INITARGS and
471 [type] :DOCUMENTATION are also allowed.
473 The :REPORT option is peculiar to DEFINE-CONDITION. Its argument is either
474 a string or a two-argument lambda or function name. If a function, the
475 function is called with the condition and stream to report the condition.
476 If a string, the string is printed.
478 Condition types are classes, but (as allowed by ANSI and not as described in
479 CLtL2) are neither STANDARD-OBJECTs nor STRUCTURE-OBJECTs. WITH-SLOTS and
480 SLOT-VALUE may not be used on condition objects."
481 (let* ((parent-types (or parent-types '(condition)))
482 (layout (find-condition-layout name parent-types))
485 (default-initargs ()))
487 (all-readers nil append)
488 (all-writers nil append))
489 (dolist (spec slot-specs)
490 (when (keywordp spec)
491 (warn "Keyword slot name indicates probable syntax error:~% ~S"
493 (let* ((spec (if (consp spec) spec (list spec)))
494 (slot-name (first spec))
495 (allocation :instance)
502 (do ((options (rest spec) (cddr options)))
504 (unless (and (consp options) (consp (cdr options)))
505 (error "malformed condition slot spec:~% ~S." spec))
506 (let ((arg (second options)))
507 (case (first options)
508 (:reader (readers arg))
509 (:writer (writers arg))
512 (writers `(setf ,arg)))
515 (error "more than one :INITFORM in ~S" spec))
518 (:initarg (initargs arg))
520 (setq allocation arg))
523 (error "more than one :DOCUMENTATION in ~S" spec))
524 (unless (stringp arg)
525 (error "slot :DOCUMENTATION argument is not a string: ~S"
527 (setq documentation arg))
530 (error "unknown slot option:~% ~S" (first options))))))
532 (all-readers (readers))
533 (all-writers (writers))
534 (slots `(make-condition-slot
536 :initargs ',(initargs)
539 :initform-p ',initform-p
540 :documentation ',documentation
542 ,(if (sb!xc:constantp initform)
543 `',(constant-form-value initform)
544 `#'(lambda () ,initform)))))))
546 (dolist (option options)
547 (unless (consp option)
548 (error "bad option:~% ~S" option))
550 (:documentation (setq documentation (second option)))
552 (let ((arg (second option)))
555 `#'(lambda (condition stream)
556 (declare (ignore condition))
557 (write-string ,arg stream))
558 `#'(lambda (condition stream)
559 (funcall #',arg condition stream))))))
561 (do ((initargs (rest option) (cddr initargs)))
563 (let ((val (second initargs)))
564 (setq default-initargs
565 (list* `',(first initargs)
566 (if (sb!xc:constantp val)
567 `',(constant-form-value val)
569 default-initargs)))))
571 (error "unknown option: ~S" (first option)))))
574 (eval-when (:compile-toplevel)
575 (%compiler-define-condition ',name ',parent-types ',layout
576 ',(all-readers) ',(all-writers)))
577 (eval-when (:load-toplevel :execute)
578 (%define-condition ',name
583 (list ,@default-initargs)
586 (sb!c:source-location))
587 ;; This needs to be after %DEFINE-CONDITION in case :REPORT
588 ;; is a lambda referring to condition slot accessors:
589 ;; they're not proclaimed as functions before it has run if
590 ;; we're under EVAL or loaded as source.
591 (%set-condition-report ',name ,report))))))
593 ;;;; various CONDITIONs specified by ANSI
595 (define-condition serious-condition (condition) ())
597 (define-condition error (serious-condition) ())
599 (define-condition warning (condition) ())
600 (define-condition style-warning (warning) ())
602 (defun simple-condition-printer (condition stream)
603 (let ((control (simple-condition-format-control condition)))
605 (apply #'format stream
607 (simple-condition-format-arguments condition))
608 (error "No format-control for ~S" condition))))
610 (define-condition simple-condition ()
611 ((format-control :reader simple-condition-format-control
612 :initarg :format-control
614 :type format-control)
615 (format-arguments :reader simple-condition-format-arguments
616 :initarg :format-arguments
619 (:report simple-condition-printer))
621 (define-condition simple-warning (simple-condition warning) ())
623 (define-condition simple-error (simple-condition error) ())
625 (define-condition storage-condition (serious-condition) ())
627 (define-condition type-error (error)
628 ((datum :reader type-error-datum :initarg :datum)
629 (expected-type :reader type-error-expected-type :initarg :expected-type))
631 (lambda (condition stream)
633 "~@<The value ~2I~:_~S ~I~_is not of type ~2I~_~S.~:>"
634 (type-error-datum condition)
635 (type-error-expected-type condition)))))
637 (def!method print-object ((condition type-error) stream)
639 (flet ((maybe-string (thing)
641 (write-to-string thing :lines 1 :readably nil :array nil :pretty t))))
642 (let ((type (maybe-string (type-error-expected-type condition)))
643 (datum (maybe-string (type-error-datum condition))))
645 (print-unreadable-object (condition stream :type t)
646 (format stream "~@<expected-type: ~A ~_datum: ~A~:@>" type datum))
647 (call-next-method))))
650 ;;; not specified by ANSI, but too useful not to have around.
651 (define-condition simple-style-warning (simple-condition style-warning) ())
652 (define-condition simple-type-error (simple-condition type-error) ())
654 ;; Can't have a function called SIMPLE-TYPE-ERROR or TYPE-ERROR...
655 (declaim (ftype (sfunction (t t t &rest t) nil) bad-type))
656 (defun bad-type (datum type control &rest arguments)
657 (error 'simple-type-error
660 :format-control control
661 :format-arguments arguments))
663 (define-condition program-error (error) ())
664 (define-condition parse-error (error) ())
665 (define-condition control-error (error) ())
666 (define-condition stream-error (error)
667 ((stream :reader stream-error-stream :initarg :stream)))
669 (define-condition end-of-file (stream-error) ()
671 (lambda (condition stream)
674 (stream-error-stream condition)))))
676 (define-condition closed-stream-error (stream-error) ()
678 (lambda (condition stream)
679 (format stream "~S is closed" (stream-error-stream condition)))))
681 (define-condition file-error (error)
682 ((pathname :reader file-error-pathname :initarg :pathname))
684 (lambda (condition stream)
685 (format stream "error on file ~S" (file-error-pathname condition)))))
687 (define-condition package-error (error)
688 ((package :reader package-error-package :initarg :package)))
690 (define-condition cell-error (error)
691 ((name :reader cell-error-name :initarg :name)))
693 (def!method print-object ((condition cell-error) stream)
694 (if (and *print-escape* (slot-boundp condition 'name))
695 (print-unreadable-object (condition stream :type t :identity t)
696 (princ (cell-error-name condition) stream))
699 (define-condition unbound-variable (cell-error) ()
701 (lambda (condition stream)
703 "The variable ~S is unbound."
704 (cell-error-name condition)))))
706 (define-condition undefined-function (cell-error) ()
708 (lambda (condition stream)
710 "The function ~/sb-impl::print-symbol-with-prefix/ is undefined."
711 (cell-error-name condition)))))
713 (define-condition special-form-function (undefined-function) ()
715 (lambda (condition stream)
717 "Cannot FUNCALL the SYMBOL-FUNCTION of special operator ~S."
718 (cell-error-name condition)))))
720 (define-condition arithmetic-error (error)
721 ((operation :reader arithmetic-error-operation
724 (operands :reader arithmetic-error-operands
726 (:report (lambda (condition stream)
728 "arithmetic error ~S signalled"
730 (when (arithmetic-error-operation condition)
732 "~%Operation was ~S, operands ~S."
733 (arithmetic-error-operation condition)
734 (arithmetic-error-operands condition))))))
736 (define-condition division-by-zero (arithmetic-error) ())
737 (define-condition floating-point-overflow (arithmetic-error) ())
738 (define-condition floating-point-underflow (arithmetic-error) ())
739 (define-condition floating-point-inexact (arithmetic-error) ())
740 (define-condition floating-point-invalid-operation (arithmetic-error) ())
742 (define-condition print-not-readable (error)
743 ((object :reader print-not-readable-object :initarg :object))
745 (lambda (condition stream)
746 (let ((obj (print-not-readable-object condition))
748 (format stream "~S cannot be printed readably." obj)))))
750 (define-condition reader-error (parse-error stream-error) ()
751 (:report (lambda (condition stream)
752 (%report-reader-error condition stream))))
754 ;;; a READER-ERROR whose REPORTing is controlled by FORMAT-CONTROL and
755 ;;; FORMAT-ARGS (the usual case for READER-ERRORs signalled from
756 ;;; within SBCL itself)
758 ;;; (Inheriting CL:SIMPLE-CONDITION here isn't quite consistent with
759 ;;; the letter of the ANSI spec: this is not a condition signalled by
760 ;;; SIGNAL when a format-control is supplied by the function's first
761 ;;; argument. It seems to me (WHN) to be basically in the spirit of
762 ;;; the spec, but if not, it'd be straightforward to do our own
763 ;;; DEFINE-CONDITION SB-INT:SIMPLISTIC-CONDITION with
764 ;;; FORMAT-CONTROL and FORMAT-ARGS slots, and use that condition in
765 ;;; place of CL:SIMPLE-CONDITION here.)
766 (define-condition simple-reader-error (reader-error simple-condition)
768 (:report (lambda (condition stream)
769 (%report-reader-error condition stream :simple t))))
771 (defun stream-error-position-info (stream &optional position)
772 (unless (interactive-stream-p stream)
773 (let ((now (file-position-or-nil-for-error stream))
775 (when (and (not pos) now (plusp now))
776 ;; FILE-POSITION is the next character -- error is at the previous one.
780 (< pos sb!xc:array-dimension-limit)
781 (file-position stream :start))
783 (make-string pos :element-type (stream-element-type stream))))
784 (when (= pos (read-sequence string stream))
785 ;; Lines count from 1, columns from 0. It's stupid and traditional.
786 (setq lineno (1+ (count #\Newline string))
787 colno (- pos (or (position #\Newline string :from-end t) 0)))))
788 (file-position-or-nil-for-error stream now))
789 (remove-if-not #'second
790 (list (list :line lineno)
792 (list :file-position pos)))))))
794 ;;; base REPORTing of a READER-ERROR
796 ;;; When SIMPLE, we expect and use SIMPLE-CONDITION-ish FORMAT-CONTROL
797 ;;; and FORMAT-ARGS slots.
798 (defun %report-reader-error (condition stream &key simple position)
799 (let ((error-stream (stream-error-stream condition)))
800 (pprint-logical-block (stream nil)
802 (apply #'format stream
803 (simple-condition-format-control condition)
804 (simple-condition-format-arguments condition))
805 (prin1 (class-name (class-of condition)) stream))
806 (format stream "~2I~@[~_~_~:{~:(~A~): ~S~:^, ~:_~}~]~_~_Stream: ~S"
807 (stream-error-position-info error-stream position)
810 ;;;; special SBCL extension conditions
812 ;;; an error apparently caused by a bug in SBCL itself
814 ;;; Note that we don't make any serious effort to use this condition
815 ;;; for *all* errors in SBCL itself. E.g. type errors and array
816 ;;; indexing errors can occur in functions called from SBCL code, and
817 ;;; will just end up as ordinary TYPE-ERROR or invalid index error,
818 ;;; because the signalling code has no good way to know that the
819 ;;; underlying problem is a bug in SBCL. But in the fairly common case
820 ;;; that the signalling code does know that it's found a bug in SBCL,
821 ;;; this condition is appropriate, reusing boilerplate and helping
822 ;;; users to recognize it as an SBCL bug.
823 (define-condition bug (simple-error)
826 (lambda (condition stream)
829 (simple-condition-format-control condition)
830 (simple-condition-format-arguments condition)
831 "~@<This is probably a bug in SBCL itself. (Alternatively, ~
832 SBCL might have been corrupted by bad user code, e.g. by an ~
833 undefined Lisp operation like ~S, or by stray pointers from ~
834 alien code or from unsafe Lisp code; or there might be a bug ~
835 in the OS or hardware that SBCL is running on.) If it seems to ~
836 be a bug in SBCL itself, the maintainers would like to know ~
837 about it. Bug reports are welcome on the SBCL ~
838 mailing lists, which you can find at ~
839 <http://sbcl.sourceforge.net/>.~:@>"
840 '((fmakunbound 'compile))))))
842 (define-condition simple-storage-condition (storage-condition simple-condition)
845 ;;; a condition for use in stubs for operations which aren't supported
846 ;;; on some platforms
848 ;;; E.g. in sbcl-0.7.0.5, it might be appropriate to do something like
849 ;;; #-(or freebsd linux)
850 ;;; (defun load-foreign (&rest rest)
851 ;;; (error 'unsupported-operator :name 'load-foreign))
852 ;;; #+(or freebsd linux)
853 ;;; (defun load-foreign ... actual definition ...)
854 ;;; By signalling a standard condition in this case, we make it
855 ;;; possible for test code to distinguish between (1) intentionally
856 ;;; unimplemented and (2) unintentionally just screwed up somehow.
857 ;;; (Before this condition was defined, test code tried to deal with
858 ;;; this by checking for FBOUNDP, but that didn't work reliably. In
859 ;;; sbcl-0.7.0, a package screwup left the definition of
860 ;;; LOAD-FOREIGN in the wrong package, so it was unFBOUNDP even on
861 ;;; architectures where it was supposed to be supported, and the
862 ;;; regression tests cheerfully passed because they assumed that
863 ;;; unFBOUNDPness meant they were running on an system which didn't
864 ;;; support the extension.)
865 (define-condition unsupported-operator (simple-error) ())
867 ;;; (:ansi-cl :function remove)
868 ;;; (:ansi-cl :section (a b c))
869 ;;; (:ansi-cl :glossary "similar")
871 ;;; (:sbcl :node "...")
872 ;;; (:sbcl :variable *ed-functions*)
874 ;;; FIXME: this is not the right place for this.
875 (defun print-reference (reference stream)
876 (ecase (car reference)
878 (format stream "AMOP")
880 (destructuring-bind (type data) (cdr reference)
882 (:readers "Readers for ~:(~A~) Metaobjects"
883 (substitute #\ #\- (symbol-name data)))
885 (format stream "Initialization of ~:(~A~) Metaobjects"
886 (substitute #\ #\- (symbol-name data))))
887 (:generic-function (format stream "Generic Function ~S" data))
888 (:function (format stream "Function ~S" data))
889 (:section (format stream "Section ~{~D~^.~}" data)))))
891 (format stream "The ANSI Standard")
893 (destructuring-bind (type data) (cdr reference)
895 (:function (format stream "Function ~S" data))
896 (:special-operator (format stream "Special Operator ~S" data))
897 (:macro (format stream "Macro ~S" data))
898 (:section (format stream "Section ~{~D~^.~}" data))
899 (:glossary (format stream "Glossary entry for ~S" data))
900 (:issue (format stream "writeup for Issue ~A" data)))))
902 (format stream "The SBCL Manual")
904 (destructuring-bind (type data) (cdr reference)
906 (:node (format stream "Node ~S" data))
907 (:variable (format stream "Variable ~S" data))
908 (:function (format stream "Function ~S" data)))))
909 ;; FIXME: other documents (e.g. CLIM, Franz documentation :-)
911 (define-condition reference-condition ()
912 ((references :initarg :references :reader reference-condition-references)))
913 (defvar *print-condition-references* t)
914 (def!method print-object :around ((o reference-condition) s)
916 (unless (or *print-escape* *print-readably*)
917 (when (and *print-condition-references*
918 (reference-condition-references o))
919 (format s "~&See also:~%")
920 (pprint-logical-block (s nil :per-line-prefix " ")
921 (do* ((rs (reference-condition-references o) (cdr rs))
922 (r (car rs) (car rs)))
924 (print-reference r s)
925 (unless (null (cdr rs))
928 (define-condition simple-reference-error (reference-condition simple-error)
931 (define-condition simple-reference-warning (reference-condition simple-warning)
934 (define-condition arguments-out-of-domain-error
935 (arithmetic-error reference-condition)
938 (define-condition duplicate-definition (reference-condition warning)
939 ((name :initarg :name :reader duplicate-definition-name))
940 (:report (lambda (c s)
941 (format s "~@<Duplicate definition for ~S found in ~
943 (duplicate-definition-name c))))
944 (:default-initargs :references (list '(:ansi-cl :section (3 2 2 3)))))
946 (define-condition constant-modified (reference-condition warning)
947 ((fun-name :initarg :fun-name :reader constant-modified-fun-name))
948 (:report (lambda (c s)
949 (format s "~@<Destructive function ~S called on ~
951 (constant-modified-fun-name c))))
952 (:default-initargs :references (list '(:ansi-cl :special-operator quote)
953 '(:ansi-cl :section (3 2 2 3)))))
955 (define-condition package-at-variance (reference-condition simple-warning)
957 (:default-initargs :references (list '(:ansi-cl :macro defpackage))))
959 (define-condition defconstant-uneql (reference-condition error)
960 ((name :initarg :name :reader defconstant-uneql-name)
961 (old-value :initarg :old-value :reader defconstant-uneql-old-value)
962 (new-value :initarg :new-value :reader defconstant-uneql-new-value))
964 (lambda (condition stream)
966 "~@<The constant ~S is being redefined (from ~S to ~S)~@:>"
967 (defconstant-uneql-name condition)
968 (defconstant-uneql-old-value condition)
969 (defconstant-uneql-new-value condition))))
970 (:default-initargs :references (list '(:ansi-cl :macro defconstant)
971 '(:sbcl :node "Idiosyncrasies"))))
973 (define-condition array-initial-element-mismatch
974 (reference-condition simple-warning)
978 '(:ansi-cl :function make-array)
979 '(:ansi-cl :function sb!xc:upgraded-array-element-type))))
981 (define-condition type-warning (reference-condition simple-warning)
983 (:default-initargs :references (list '(:sbcl :node "Handling of Types"))))
984 (define-condition type-style-warning (reference-condition simple-style-warning)
986 (:default-initargs :references (list '(:sbcl :node "Handling of Types"))))
988 (define-condition local-argument-mismatch (reference-condition simple-warning)
990 (:default-initargs :references (list '(:ansi-cl :section (3 2 2 3)))))
992 (define-condition format-args-mismatch (reference-condition)
994 (:default-initargs :references (list '(:ansi-cl :section (22 3 10 2)))))
996 (define-condition format-too-few-args-warning
997 (format-args-mismatch simple-warning)
999 (define-condition format-too-many-args-warning
1000 (format-args-mismatch simple-style-warning)
1003 (define-condition implicit-generic-function-warning (style-warning)
1004 ((name :initarg :name :reader implicit-generic-function-name))
1006 (lambda (condition stream)
1007 (format stream "~@<Implicitly creating new generic function ~S.~:@>"
1008 (implicit-generic-function-name condition)))))
1010 (define-condition extension-failure (reference-condition simple-error)
1013 (define-condition structure-initarg-not-keyword
1014 (reference-condition simple-style-warning)
1016 (:default-initargs :references (list '(:ansi-cl :section (2 4 8 13)))))
1021 (define-condition package-lock-violation (package-error
1024 ((current-package :initform *package*
1025 :reader package-lock-violation-in-package))
1027 (lambda (condition stream)
1028 (let ((control (simple-condition-format-control condition))
1029 (error-package (package-name (package-error-package condition)))
1030 (current-package (package-name (package-lock-violation-in-package condition))))
1032 (apply #'format stream
1033 (format nil "~~@<Lock on package ~A violated when ~A while in package ~A.~~:@>"
1037 (simple-condition-format-arguments condition))
1038 (format stream "~@<Lock on package ~A violated while in package ~A.~:@>"
1040 current-package)))))
1041 ;; no :default-initargs -- reference-stuff provided by the
1042 ;; signalling form in target-package.lisp
1045 "Subtype of CL:PACKAGE-ERROR. A subtype of this error is signalled
1046 when a package-lock is violated."))
1048 (define-condition package-locked-error (package-lock-violation) ()
1051 "Subtype of SB-EXT:PACKAGE-LOCK-VIOLATION. An error of this type is
1052 signalled when an operation on a package violates a package lock."))
1054 (define-condition symbol-package-locked-error (package-lock-violation)
1055 ((symbol :initarg :symbol :reader package-locked-error-symbol))
1058 "Subtype of SB-EXT:PACKAGE-LOCK-VIOLATION. An error of this type is
1059 signalled when an operation on a symbol violates a package lock. The
1060 symbol that caused the violation is accessed by the function
1061 SB-EXT:PACKAGE-LOCKED-ERROR-SYMBOL."))
1065 (define-condition undefined-alien-error (cell-error) ()
1067 (lambda (condition stream)
1068 (if (slot-boundp condition 'name)
1069 (format stream "Undefined alien: ~S" (cell-error-name condition))
1070 (format stream "Undefined alien symbol.")))))
1072 (define-condition undefined-alien-variable-error (undefined-alien-error) ()
1074 (lambda (condition stream)
1075 (declare (ignore condition))
1076 (format stream "Attempt to access an undefined alien variable."))))
1078 (define-condition undefined-alien-function-error (undefined-alien-error) ()
1080 (lambda (condition stream)
1081 (declare (ignore condition))
1082 (format stream "Attempt to call an undefined alien function."))))
1085 ;;;; various other (not specified by ANSI) CONDITIONs
1087 ;;;; These might logically belong in other files; they're here, after
1088 ;;;; setup of CONDITION machinery, only because that makes it easier to
1089 ;;;; get cold init to work.
1091 ;;; OAOOM warning: see cross-condition.lisp
1092 (define-condition encapsulated-condition (condition)
1093 ((condition :initarg :condition :reader encapsulated-condition)))
1095 ;;; KLUDGE: a condition for floating point errors when we can't or
1096 ;;; won't figure out what type they are. (In FreeBSD and OpenBSD we
1097 ;;; don't know how, at least as of sbcl-0.6.7; in Linux we probably
1098 ;;; know how but the old code was broken by the conversion to POSIX
1099 ;;; signal handling and hasn't been fixed as of sbcl-0.6.7.)
1101 ;;; FIXME: Perhaps this should also be a base class for all
1102 ;;; floating point exceptions?
1103 (define-condition floating-point-exception (arithmetic-error)
1104 ((flags :initarg :traps
1106 :reader floating-point-exception-traps))
1107 (:report (lambda (condition stream)
1109 "An arithmetic error ~S was signalled.~%"
1110 (type-of condition))
1111 (let ((traps (floating-point-exception-traps condition)))
1114 "Trapping conditions are: ~%~{ ~S~^~}~%"
1117 "No traps are enabled? How can this be?"
1120 (define-condition invalid-array-index-error (type-error)
1121 ((array :initarg :array :reader invalid-array-index-error-array)
1122 (axis :initarg :axis :reader invalid-array-index-error-axis))
1124 (lambda (condition stream)
1125 (let ((array (invalid-array-index-error-array condition)))
1126 (format stream "Index ~W out of bounds for ~@[axis ~W of ~]~S, ~
1127 should be nonnegative and <~W."
1128 (type-error-datum condition)
1129 (when (> (array-rank array) 1)
1130 (invalid-array-index-error-axis condition))
1132 ;; Extract the bound from (INTEGER 0 (BOUND))
1133 (caaddr (type-error-expected-type condition)))))))
1135 (define-condition invalid-array-error (reference-condition type-error) ()
1137 (lambda (condition stream)
1138 (let ((*print-array* nil))
1140 "~@<Displaced array originally of type ~S has been invalidated ~
1141 due its displaced-to array ~S having become too small to hold ~
1142 it: the displaced array's dimensions have all been set to zero ~
1143 to trap accesses to it.~:@>"
1144 (type-error-expected-type condition)
1145 (array-displacement (type-error-datum condition))))))
1148 (list '(:ansi-cl :function adjust-array))))
1150 (define-condition index-too-large-error (type-error)
1153 (lambda (condition stream)
1155 "The index ~S is too large."
1156 (type-error-datum condition)))))
1158 (define-condition bounding-indices-bad-error (reference-condition type-error)
1159 ((object :reader bounding-indices-bad-object :initarg :object))
1161 (lambda (condition stream)
1162 (let* ((datum (type-error-datum condition))
1165 (object (bounding-indices-bad-object condition)))
1169 "The bounding indices ~S and ~S are bad ~
1170 for a sequence of length ~S."
1171 start end (length object)))
1173 ;; from WITH-ARRAY-DATA
1175 "The START and END parameters ~S and ~S are ~
1176 bad for an array of total size ~S."
1177 start end (array-total-size object)))))))
1180 (list '(:ansi-cl :glossary "bounding index designator")
1181 '(:ansi-cl :issue "SUBSEQ-OUT-OF-BOUNDS:IS-AN-ERROR"))))
1183 (define-condition nil-array-accessed-error (reference-condition type-error)
1185 (:report (lambda (condition stream)
1186 (declare (ignore condition))
1188 "An attempt to access an array of element-type ~
1189 NIL was made. Congratulations!")))
1191 :references (list '(:ansi-cl :function sb!xc:upgraded-array-element-type)
1192 '(:ansi-cl :section (15 1 2 1))
1193 '(:ansi-cl :section (15 1 2 2)))))
1195 (define-condition namestring-parse-error (parse-error)
1196 ((complaint :reader namestring-parse-error-complaint :initarg :complaint)
1197 (args :reader namestring-parse-error-args :initarg :args :initform nil)
1198 (namestring :reader namestring-parse-error-namestring :initarg :namestring)
1199 (offset :reader namestring-parse-error-offset :initarg :offset))
1201 (lambda (condition stream)
1203 "parse error in namestring: ~?~% ~A~% ~V@T^"
1204 (namestring-parse-error-complaint condition)
1205 (namestring-parse-error-args condition)
1206 (namestring-parse-error-namestring condition)
1207 (namestring-parse-error-offset condition)))))
1209 (define-condition simple-package-error (simple-condition package-error) ())
1211 (define-condition simple-reader-package-error (simple-reader-error package-error) ())
1213 (define-condition reader-eof-error (end-of-file)
1214 ((context :reader reader-eof-error-context :initarg :context))
1216 (lambda (condition stream)
1218 "unexpected end of file on ~S ~A"
1219 (stream-error-stream condition)
1220 (reader-eof-error-context condition)))))
1222 (define-condition reader-impossible-number-error (simple-reader-error)
1223 ((error :reader reader-impossible-number-error-error :initarg :error))
1225 (lambda (condition stream)
1226 (let ((error-stream (stream-error-stream condition)))
1228 "READER-ERROR ~@[at ~W ~]on ~S:~%~?~%Original error: ~A"
1229 (file-position-or-nil-for-error error-stream) error-stream
1230 (simple-condition-format-control condition)
1231 (simple-condition-format-arguments condition)
1232 (reader-impossible-number-error-error condition))))))
1234 (define-condition standard-readtable-modified-error (reference-condition error)
1235 ((operation :initarg :operation :reader standard-readtable-modified-operation))
1236 (:report (lambda (condition stream)
1237 (format stream "~S would modify the standard readtable."
1238 (standard-readtable-modified-operation condition))))
1239 (:default-initargs :references `((:ansi-cl :section (2 1 1 2))
1240 (:ansi-cl :glossary "standard readtable"))))
1242 (define-condition standard-pprint-dispatch-table-modified-error
1243 (reference-condition error)
1244 ((operation :initarg :operation
1245 :reader standard-pprint-dispatch-table-modified-operation))
1246 (:report (lambda (condition stream)
1247 (format stream "~S would modify the standard pprint dispatch table."
1248 (standard-pprint-dispatch-table-modified-operation
1251 :references `((:ansi-cl :glossary "standard pprint dispatch table"))))
1253 (define-condition timeout (serious-condition)
1254 ((seconds :initarg :seconds :initform nil :reader timeout-seconds))
1255 (:report (lambda (condition stream)
1256 (format stream "Timeout occurred~@[ after ~A seconds~]."
1257 (timeout-seconds condition)))))
1259 (define-condition io-timeout (stream-error timeout)
1260 ((direction :reader io-timeout-direction :initarg :direction))
1262 (lambda (condition stream)
1263 (declare (type stream stream))
1265 "I/O timeout while doing ~(~A~) on ~S."
1266 (io-timeout-direction condition)
1267 (stream-error-stream condition)))))
1269 (define-condition deadline-timeout (timeout) ()
1270 (:report (lambda (condition stream)
1271 (format stream "A deadline was reached after ~A seconds."
1272 (timeout-seconds condition)))))
1274 (define-condition declaration-type-conflict-error (reference-condition
1278 :format-control "symbol ~S cannot be both the name of a type and the name of a declaration"
1279 :references (list '(:ansi-cl :section (3 8 21)))))
1281 ;;; Single stepping conditions
1283 (define-condition step-condition ()
1284 ((form :initarg :form :reader step-condition-form))
1287 (:documentation "Common base class of single-stepping conditions.
1288 STEP-CONDITION-FORM holds a string representation of the form being
1292 (setf (fdocumentation 'step-condition-form 'function)
1293 "Form associated with the STEP-CONDITION.")
1295 (define-condition step-form-condition (step-condition)
1296 ((args :initarg :args :reader step-condition-args))
1298 (lambda (condition stream)
1299 (let ((*print-circle* t)
1301 (*print-readably* nil))
1303 "Evaluating call:~%~< ~@;~A~:>~%~
1304 ~:[With arguments:~%~{ ~S~%~}~;With unknown arguments~]~%"
1305 (list (step-condition-form condition))
1306 (eq (step-condition-args condition) :unknown)
1307 (step-condition-args condition)))))
1309 (:documentation "Condition signalled by code compiled with
1310 single-stepping information when about to execute a form.
1311 STEP-CONDITION-FORM holds the form, STEP-CONDITION-PATHNAME holds the
1312 pathname of the original file or NIL, and STEP-CONDITION-SOURCE-PATH
1313 holds the source-path to the original form within that file or NIL.
1314 Associated with this condition are always the restarts STEP-INTO,
1315 STEP-NEXT, and STEP-CONTINUE."))
1317 (define-condition step-result-condition (step-condition)
1318 ((result :initarg :result :reader step-condition-result)))
1321 (setf (fdocumentation 'step-condition-result 'function)
1322 "Return values associated with STEP-VALUES-CONDITION as a list,
1323 or the variable value associated with STEP-VARIABLE-CONDITION.")
1325 (define-condition step-values-condition (step-result-condition)
1328 (:documentation "Condition signalled by code compiled with
1329 single-stepping information after executing a form.
1330 STEP-CONDITION-FORM holds the form, and STEP-CONDITION-RESULT holds
1331 the values returned by the form as a list. No associated restarts."))
1333 (define-condition step-finished-condition (step-condition)
1336 (lambda (condition stream)
1337 (declare (ignore condition))
1338 (format stream "Returning from STEP")))
1340 (:documentation "Condition signaled when STEP returns."))
1342 ;;; A knob for muffling warnings, mostly for use while loading files.
1343 (defvar *muffled-warnings* 'uninteresting-redefinition
1344 "A type that ought to specify a subtype of WARNING. Whenever a
1345 warning is signaled, if the warning if of this type and is not
1346 handled by any other handler, it will be muffled.")
1348 ;;; Various STYLE-WARNING signaled in the system.
1349 ;; For the moment, we're only getting into the details for function
1350 ;; redefinitions, but other redefinitions could be done later
1352 (define-condition redefinition-warning (style-warning)
1355 :reader redefinition-warning-name)
1357 :initarg :new-location
1358 :reader redefinition-warning-new-location)))
1360 (define-condition function-redefinition-warning (redefinition-warning)
1362 :initarg :new-function
1363 :reader function-redefinition-warning-new-function)))
1365 (define-condition redefinition-with-defun (function-redefinition-warning)
1367 (:report (lambda (warning stream)
1368 (format stream "redefining ~/sb-impl::print-symbol-with-prefix/ ~
1370 (redefinition-warning-name warning)))))
1372 (define-condition redefinition-with-defmacro (function-redefinition-warning)
1374 (:report (lambda (warning stream)
1375 (format stream "redefining ~/sb-impl::print-symbol-with-prefix/ ~
1377 (redefinition-warning-name warning)))))
1379 (define-condition redefinition-with-defgeneric (redefinition-warning)
1381 (:report (lambda (warning stream)
1382 (format stream "redefining ~/sb-impl::print-symbol-with-prefix/ ~
1384 (redefinition-warning-name warning)))))
1386 (define-condition redefinition-with-defmethod (redefinition-warning)
1387 ((qualifiers :initarg :qualifiers
1388 :reader redefinition-with-defmethod-qualifiers)
1389 (specializers :initarg :specializers
1390 :reader redefinition-with-defmethod-specializers)
1391 (new-location :initarg :new-location
1392 :reader redefinition-with-defmethod-new-location)
1393 (old-method :initarg :old-method
1394 :reader redefinition-with-defmethod-old-method))
1395 (:report (lambda (warning stream)
1396 (format stream "redefining ~S~{ ~S~} ~S in DEFMETHOD"
1397 (redefinition-warning-name warning)
1398 (redefinition-with-defmethod-qualifiers warning)
1399 (redefinition-with-defmethod-specializers warning)))))
1401 ;;;; Deciding which redefinitions are "interesting".
1403 (defun function-file-namestring (function)
1405 (when (typep function 'sb!eval:interpreted-function)
1406 (return-from function-file-namestring
1407 (sb!c:definition-source-location-namestring
1408 (sb!eval:interpreted-function-source-location function))))
1409 (let* ((fun (sb!kernel:%fun-fun function))
1410 (code (sb!kernel:fun-code-header fun))
1411 (debug-info (sb!kernel:%code-debug-info code))
1412 (debug-source (when debug-info
1413 (sb!c::debug-info-source debug-info)))
1414 (namestring (when debug-source
1415 (sb!c::debug-source-namestring debug-source))))
1418 (defun interesting-function-redefinition-warning-p (warning old)
1419 (let ((new (function-redefinition-warning-new-function warning))
1420 (source-location (redefinition-warning-new-location warning)))
1422 ;; Compiled->Interpreted is interesting.
1423 (and (typep old 'compiled-function)
1424 (typep new '(not compiled-function)))
1425 ;; FIN->Regular is interesting.
1426 (and (typep old 'funcallable-instance)
1427 (typep new '(not funcallable-instance)))
1428 ;; Different file or unknown location is interesting.
1429 (let* ((old-namestring (function-file-namestring old))
1431 (or (function-file-namestring new)
1432 (when source-location
1433 (sb!c::definition-source-location-namestring source-location)))))
1434 (and (or (not old-namestring)
1435 (not new-namestring)
1436 (not (string= old-namestring new-namestring))))))))
1438 (defun uninteresting-ordinary-function-redefinition-p (warning)
1440 ;; There's garbage in various places when the first DEFUN runs in
1442 sb!kernel::*cold-init-complete-p*
1443 (typep warning 'redefinition-with-defun)
1445 (let ((name (redefinition-warning-name warning)))
1446 (not (interesting-function-redefinition-warning-p
1447 warning (or (fdefinition name) (macro-function name)))))))
1449 (defun uninteresting-macro-redefinition-p (warning)
1451 (typep warning 'redefinition-with-defmacro)
1453 (let ((name (redefinition-warning-name warning)))
1454 (not (interesting-function-redefinition-warning-p
1455 warning (or (macro-function name) (fdefinition name)))))))
1457 (defun uninteresting-generic-function-redefinition-p (warning)
1459 (typep warning 'redefinition-with-defgeneric)
1460 ;; Can't use the shared logic above, since GF's don't get a "new"
1461 ;; definition -- rather the FIN-FUNCTION is set.
1462 (let* ((name (redefinition-warning-name warning))
1463 (old (fdefinition name))
1464 (old-location (when (typep old 'generic-function)
1465 (sb!pcl::definition-source old)))
1466 (old-namestring (when old-location
1467 (sb!c:definition-source-location-namestring old-location)))
1468 (new-location (redefinition-warning-new-location warning))
1469 (new-namestring (when new-location
1470 (sb!c:definition-source-location-namestring new-location))))
1473 (string= old-namestring new-namestring)))))
1475 (defun uninteresting-method-redefinition-p (warning)
1477 (typep warning 'redefinition-with-defmethod)
1478 ;; Can't use the shared logic above, since GF's don't get a "new"
1479 ;; definition -- rather the FIN-FUNCTION is set.
1480 (let* ((old-method (redefinition-with-defmethod-old-method warning))
1481 (old-location (sb!pcl::definition-source old-method))
1482 (old-namestring (when old-location
1483 (sb!c:definition-source-location-namestring old-location)))
1484 (new-location (redefinition-warning-new-location warning))
1485 (new-namestring (when new-location
1486 (sb!c:definition-source-location-namestring new-location))))
1489 (string= new-namestring old-namestring)))))
1491 (deftype uninteresting-redefinition ()
1492 '(or (satisfies uninteresting-ordinary-function-redefinition-p)
1493 (satisfies uninteresting-macro-redefinition-p)
1494 (satisfies uninteresting-generic-function-redefinition-p)
1495 (satisfies uninteresting-method-redefinition-p)))
1497 (define-condition redefinition-with-deftransform (redefinition-warning)
1498 ((transform :initarg :transform
1499 :reader redefinition-with-deftransform-transform))
1500 (:report (lambda (warning stream)
1501 (format stream "Overwriting ~S"
1502 (redefinition-with-deftransform-transform warning)))))
1504 ;;; Various other STYLE-WARNINGS
1505 (define-condition dubious-asterisks-around-variable-name
1506 (style-warning simple-condition)
1508 (:report (lambda (warning stream)
1509 (format stream "~@?, even though the name follows~@
1510 the usual naming convention (names like *FOO*) for special variables"
1511 (simple-condition-format-control warning)
1512 (simple-condition-format-arguments warning)))))
1514 (define-condition asterisks-around-lexical-variable-name
1515 (dubious-asterisks-around-variable-name)
1518 (define-condition asterisks-around-constant-variable-name
1519 (dubious-asterisks-around-variable-name)
1522 ;; We call this UNDEFINED-ALIEN-STYLE-WARNING because there are some
1523 ;; subclasses of ERROR above having to do with undefined aliens.
1524 (define-condition undefined-alien-style-warning (style-warning)
1525 ((symbol :initarg :symbol :reader undefined-alien-symbol))
1526 (:report (lambda (warning stream)
1527 (format stream "Undefined alien: ~S"
1528 (undefined-alien-symbol warning)))))
1531 (define-condition lexical-environment-too-complex (style-warning)
1532 ((form :initarg :form :reader lexical-environment-too-complex-form)
1533 (lexenv :initarg :lexenv :reader lexical-environment-too-complex-lexenv))
1534 (:report (lambda (warning stream)
1536 "~@<Native lexical environment too complex for ~
1537 SB-EVAL to evaluate ~S, falling back to ~
1538 SIMPLE-EVAL-IN-LEXENV. Lexenv: ~S~:@>"
1539 (lexical-environment-too-complex-form warning)
1540 (lexical-environment-too-complex-lexenv warning)))))
1542 ;; Although this has -ERROR- in the name, it's just a STYLE-WARNING.
1543 (define-condition character-decoding-error-in-comment (style-warning)
1544 ((stream :initarg :stream :reader decoding-error-in-comment-stream)
1545 (position :initarg :position :reader decoding-error-in-comment-position))
1546 (:report (lambda (warning stream)
1548 "Character decoding error in a ~A-comment at ~
1549 position ~A reading source stream ~A, ~
1551 (decoding-error-in-comment-macro warning)
1552 (decoding-error-in-comment-position warning)
1553 (decoding-error-in-comment-stream warning)))))
1555 (define-condition character-decoding-error-in-macro-char-comment
1556 (character-decoding-error-in-comment)
1557 ((char :initform #\; :initarg :char
1558 :reader character-decoding-error-in-macro-char-comment-char)))
1560 (define-condition character-decoding-error-in-dispatch-macro-char-comment
1561 (character-decoding-error-in-comment)
1562 ;; ANSI doesn't give a way for a reader function invoked by a
1563 ;; dispatch macro character to determine which dispatch character
1564 ;; was used, so if a user wants to signal one of these from a custom
1565 ;; comment reader, he'll have to supply the :DISP-CHAR himself.
1566 ((disp-char :initform #\# :initarg :disp-char
1567 :reader character-decoding-error-in-macro-char-comment-disp-char)
1568 (sub-char :initarg :sub-char
1569 :reader character-decoding-error-in-macro-char-comment-sub-char)))
1571 (defun decoding-error-in-comment-macro (warning)
1573 (character-decoding-error-in-macro-char-comment
1574 (character-decoding-error-in-macro-char-comment-char warning))
1575 (character-decoding-error-in-dispatch-macro-char-comment
1578 (character-decoding-error-in-macro-char-comment-disp-char warning)
1579 (character-decoding-error-in-macro-char-comment-sub-char warning)))))
1581 (define-condition deprecated-eval-when-situations (style-warning)
1582 ((situations :initarg :situations
1583 :reader deprecated-eval-when-situations-situations))
1584 (:report (lambda (warning stream)
1585 (format stream "using deprecated EVAL-WHEN situation names~{ ~S~}"
1586 (deprecated-eval-when-situations-situations warning)))))
1588 (define-condition proclamation-mismatch (style-warning)
1589 ((name :initarg :name :reader proclamation-mismatch-name)
1590 (old :initarg :old :reader proclamation-mismatch-old)
1591 (new :initarg :new :reader proclamation-mismatch-new)))
1593 (define-condition type-proclamation-mismatch (proclamation-mismatch)
1595 (:report (lambda (warning stream)
1597 "The new TYPE proclamation~% ~S for ~S does not ~
1598 match the old TYPE proclamation ~S"
1599 (proclamation-mismatch-new warning)
1600 (proclamation-mismatch-name warning)
1601 (proclamation-mismatch-old warning)))))
1603 (define-condition ftype-proclamation-mismatch (proclamation-mismatch)
1605 (:report (lambda (warning stream)
1607 "The new FTYPE proclamation~% ~S for ~S does not ~
1608 match the old FTYPE proclamation ~S"
1609 (proclamation-mismatch-new warning)
1610 (proclamation-mismatch-name warning)
1611 (proclamation-mismatch-old warning)))))
1613 ;;;; deprecation conditions
1615 (define-condition deprecation-condition ()
1616 ((name :initarg :name :reader deprecated-name)
1617 (replacement :initarg :replacement :reader deprecated-name-replacement)
1618 (since :initarg :since :reader deprecated-since)
1619 (runtime-error :initarg :runtime-error :reader deprecated-name-runtime-error)))
1621 (def!method print-object ((condition deprecation-condition) stream)
1622 (let ((*package* (find-package :keyword)))
1624 (print-unreadable-object (condition stream :type t)
1625 (format stream "~S is deprecated~@[, use ~S~]"
1626 (deprecated-name condition)
1627 (deprecated-name-replacement condition)))
1628 (format stream "~@<~S has been deprecated as of SBCL ~A~
1629 ~@[, use ~S instead~].~:@>"
1630 (deprecated-name condition)
1631 (deprecated-since condition)
1632 (deprecated-name-replacement condition)))))
1634 (define-condition early-deprecation-warning (style-warning deprecation-condition)
1637 (def!method print-object :after ((warning early-deprecation-warning) stream)
1638 (unless *print-escape*
1639 (let ((*package* (find-package :keyword)))
1640 (format stream "~%~@<~:@_In future SBCL versions ~S will signal a full warning ~
1641 at compile-time.~:@>"
1642 (deprecated-name warning)))))
1644 (define-condition late-deprecation-warning (warning deprecation-condition)
1647 (def!method print-object :after ((warning late-deprecation-warning) stream)
1648 (unless *print-escape*
1649 (when (deprecated-name-runtime-error warning)
1650 (let ((*package* (find-package :keyword)))
1651 (format stream "~%~@<~:@_In future SBCL versions ~S will signal a runtime error.~:@>"
1652 (deprecated-name warning))))))
1654 (define-condition final-deprecation-warning (warning deprecation-condition)
1657 (def!method print-object :after ((warning final-deprecation-warning) stream)
1658 (unless *print-escape*
1659 (when (deprecated-name-runtime-error warning)
1660 (let ((*package* (find-package :keyword)))
1661 (format stream "~%~@<~:@_An error will be signaled at runtime for ~S.~:@>"
1662 (deprecated-name warning))))))
1664 (define-condition deprecation-error (error deprecation-condition)
1667 ;;;; restart definitions
1669 (define-condition abort-failure (control-error) ()
1671 "An ABORT restart was found that failed to transfer control dynamically."))
1673 (defun abort (&optional condition)
1675 "Transfer control to a restart named ABORT, signalling a CONTROL-ERROR if
1677 (invoke-restart (find-restart-or-control-error 'abort condition))
1678 ;; ABORT signals an error in case there was a restart named ABORT
1679 ;; that did not transfer control dynamically. This could happen with
1681 (error 'abort-failure))
1683 (defun muffle-warning (&optional condition)
1685 "Transfer control to a restart named MUFFLE-WARNING, signalling a
1686 CONTROL-ERROR if none exists."
1687 (invoke-restart (find-restart-or-control-error 'muffle-warning condition)))
1689 (defun try-restart (name condition &rest arguments)
1690 (let ((restart (find-restart name condition)))
1692 (apply #'invoke-restart restart arguments))))
1694 (macrolet ((define-nil-returning-restart (name args doc)
1695 #!-sb-doc (declare (ignore doc))
1696 `(defun ,name (,@args &optional condition)
1698 (try-restart ',name condition ,@args))))
1699 (define-nil-returning-restart continue ()
1700 "Transfer control to a restart named CONTINUE, or return NIL if none exists.")
1701 (define-nil-returning-restart store-value (value)
1702 "Transfer control and VALUE to a restart named STORE-VALUE, or
1703 return NIL if none exists.")
1704 (define-nil-returning-restart use-value (value)
1705 "Transfer control and VALUE to a restart named USE-VALUE, or
1706 return NIL if none exists.")
1707 (define-nil-returning-restart print-unreadably ()
1708 "Transfer control to a restart named SB-EXT:PRINT-UNREADABLY, or
1709 return NIL if none exists."))
1711 ;;; single-stepping restarts
1713 (macrolet ((def (name doc)
1714 #!-sb-doc (declare (ignore doc))
1715 `(defun ,name (condition)
1717 (invoke-restart (find-restart-or-control-error ',name condition)))))
1719 "Transfers control to the STEP-CONTINUE restart associated with
1720 the condition, continuing execution without stepping. Signals a
1721 CONTROL-ERROR if the restart does not exist.")
1723 "Transfers control to the STEP-NEXT restart associated with the
1724 condition, executing the current form without stepping and continuing
1725 stepping with the next form. Signals CONTROL-ERROR is the restart does
1728 "Transfers control to the STEP-INTO restart associated with the
1729 condition, stepping into the current form. Signals a CONTROL-ERROR is
1730 the restart does not exist."))
1732 (/show0 "condition.lisp end of file")