1;;; cust-print.el --- handles print-level and print-circle
2
3;; Copyright (C) 1992, 2001, 2002, 2003, 2004, 2005,
4;;   2006, 2007 Free Software Foundation, Inc.
5
6;; Author: Daniel LaLiberte <liberte@holonexus.org>
7;; Adapted-By: ESR
8;; Keywords: extensions
9
10;; LCD Archive Entry:
11;; cust-print|Daniel LaLiberte|liberte@holonexus.org
12;; |Handle print-level, print-circle and more.
13
14;; This file is part of GNU Emacs.
15
16;; GNU Emacs is free software; you can redistribute it and/or modify
17;; it under the terms of the GNU General Public License as published by
18;; the Free Software Foundation; either version 2, or (at your option)
19;; any later version.
20
21;; GNU Emacs is distributed in the hope that it will be useful,
22;; but WITHOUT ANY WARRANTY; without even the implied warranty of
23;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24;; GNU General Public License for more details.
25
26;; You should have received a copy of the GNU General Public License
27;; along with GNU Emacs; see the file COPYING.  If not, write to the
28;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
29;; Boston, MA 02110-1301, USA.
30
31;;; Commentary:
32
33;; This package provides a general print handler for prin1 and princ
34;; that supports print-level and print-circle, and by the way,
35;; print-length since the standard routines are being replaced.  Also,
36;; to print custom types constructed from lists and vectors, use
37;; custom-print-list and custom-print-vector.  See the documentation
38;; strings of these variables for more details.
39
40;; If the results of your expressions contain circular references to
41;; other parts of the same structure, the standard Emacs print
42;; subroutines may fail to print with an untrappable error,
43;; "Apparently circular structure being printed".  If you only use cdr
44;; circular lists (where cdrs of lists point back; what is the right
45;; term here?), you can limit the length of printing with
46;; print-length.  But car circular lists and circular vectors generate
47;; the above mentioned error in Emacs version 18.  Version
48;; 19 supports print-level, but it is often useful to get a better
49;; print representation of circular and shared structures; the print-circle
50;; option may be used to print more concise representations.
51
52;; There are three main ways to use this package.  First, you may
53;; replace prin1, princ, and some subroutines that use them by calling
54;; install-custom-print so that any use of these functions in
55;; Lisp code will be affected; you can later reset with
56;; uninstall-custom-print.  Second, you may temporarily install
57;; these functions with the macro with-custom-print.  Third, you
58;; could call the custom routines directly, thus only affecting the
59;; printing that requires them.
60
61;; Note that subroutines which call print subroutines directly will
62;; not use the custom print functions.  In particular, the evaluation
63;; functions like eval-region call the print subroutines directly.
64;; Therefore, if you evaluate (aref circ-list 0), where circ-list is a
65;; circular list rather than an array, aref calls error directly which
66;; will jump to the top level instead of printing the circular list.
67
68;; Uninterned symbols are recognized when print-circle is non-nil,
69;; but they are not printed specially here.  Use the cl-packages package
70;; to print according to print-gensym.
71
72;; Obviously the right way to implement this custom-print facility is
73;; in C or with hooks into the standard printer.  Please volunteer
74;; since I don't have the time or need.  More CL-like printing
75;; capabilities could be added in the future.
76
77;; Implementation design: we want to use the same list and vector
78;; processing algorithm for all versions of prin1 and princ, since how
79;; the processing is done depends on print-length, print-level, and
80;; print-circle.  For circle printing, a preprocessing step is
81;; required before the final printing.  Thanks to Jamie Zawinski
82;; for motivation and algorithms.
83
84
85;;; Code:
86
87(defgroup cust-print nil
88  "Handles print-level and print-circle."
89  :prefix "print-"
90  :group 'lisp
91  :group 'extensions)
92
93;; If using cl-packages:
94
95'(defpackage "cust-print"
96   (:nicknames "CP" "custom-print")
97   (:use "el")
98   (:export
99    print-level
100    print-circle
101
102    custom-print-install
103    custom-print-uninstall
104    custom-print-installed-p
105    with-custom-print
106
107    custom-prin1
108    custom-princ
109    custom-prin1-to-string
110    custom-print
111    custom-format
112    custom-message
113    custom-error
114
115    custom-printers
116    add-custom-printer
117    ))
118
119'(in-package cust-print)
120
121;; Emacs 18 doesn't have defalias.
122;; Provide def for byte compiler.
123(eval-and-compile
124  (or (fboundp 'defalias) (fset 'defalias 'fset)))
125
126
127;; Variables:
128;;=========================================================
129
130;;(defvar print-length nil
131;;  "*Controls how many elements of a list, at each level, are printed.
132;;This is defined by emacs.")
133
134(defcustom print-level nil
135  "*Controls how many levels deep a nested data object will print.
136
137If nil, printing proceeds recursively and may lead to
138max-lisp-eval-depth being exceeded or an error may occur:
139`Apparently circular structure being printed.'
140Also see `print-length' and `print-circle'.
141
142If non-nil, components at levels equal to or greater than `print-level'
143are printed simply as `#'.  The object to be printed is at level 0,
144and if the object is a list or vector, its top-level components are at
145level 1."
146  :type '(choice (const nil) integer)
147  :group 'cust-print)
148
149
150(defcustom print-circle nil
151  "*Controls the printing of recursive structures.
152
153If nil, printing proceeds recursively and may lead to
154`max-lisp-eval-depth' being exceeded or an error may occur:
155\"Apparently circular structure being printed.\"  Also see
156`print-length' and `print-level'.
157
158If non-nil, shared substructures anywhere in the structure are printed
159with `#N=' before the first occurrence (in the order of the print
160representation) and `#N#' in place of each subsequent occurrence,
161where N is a positive decimal integer.
162
163There is no way to read this representation in standard Emacs,
164but if you need to do so, try the cl-read.el package."
165  :type 'boolean
166  :group 'cust-print)
167
168
169(defcustom custom-print-vectors nil
170  "*Non-nil if printing of vectors should obey print-level and print-length.
171
172For Emacs 18, setting print-level, or adding custom print list or
173vector handling will make this happen anyway.  Emacs 19 obeys
174print-level, but not for vectors."
175  :type 'boolean
176  :group 'cust-print)
177
178
179;; Custom printers
180;;==========================================================
181
182(defvar custom-printers nil
183  ;; e.g. '((symbolp . pkg::print-symbol))
184  "An alist for custom printing of any type.
185Pairs are of the form (PREDICATE . PRINTER).  If PREDICATE is true
186for an object, then PRINTER is called with the object.
187PRINTER should print to `standard-output' using cust-print-original-princ
188if the standard printer is sufficient, or cust-print-prin for complex things.
189The PRINTER should return the object being printed.
190
191Don't modify this variable directly.  Use `add-custom-printer' and
192`delete-custom-printer'")
193;; Should cust-print-original-princ and cust-print-prin be exported symbols?
194;; Or should the standard printers functions be replaced by
195;; CP ones in Emacs Lisp so that CP internal functions need not be called?
196
197(defun add-custom-printer (pred printer)
198  "Add a pair of PREDICATE and PRINTER to `custom-printers'.
199Any pair that has the same PREDICATE is first removed."
200  (setq custom-printers (cons (cons pred printer)
201			      (delq (assq pred custom-printers)
202				    custom-printers)))
203  ;; Rather than updating here, we could wait until cust-print-top-level is called.
204  (cust-print-update-custom-printers))
205
206(defun delete-custom-printer (pred)
207  "Delete the custom printer associated with PREDICATE."
208  (setq custom-printers (delq (assq pred custom-printers)
209			      custom-printers))
210  (cust-print-update-custom-printers))
211
212
213(defun cust-print-use-custom-printer (object)
214  ;; Default function returns nil.
215  nil)
216
217(defun cust-print-update-custom-printers ()
218  ;; Modify the definition of cust-print-use-custom-printer
219  (defalias 'cust-print-use-custom-printer
220    ;; We don't really want to require the byte-compiler.
221    ;; (byte-compile
222    `(lambda (object)
223       (cond
224	,@(mapcar (function
225		   (lambda (pair)
226		     `((,(car pair) object)
227		       (,(cdr pair) object))))
228		  custom-printers)
229	;; Otherwise return nil.
230	(t nil)
231	))
232    ;; )
233    ))
234
235
236;; Saving and restoring emacs printing routines.
237;;====================================================
238
239(defun cust-print-set-function-cell (symbol-pair)
240  (defalias (car symbol-pair)
241    (symbol-function (car (cdr symbol-pair)))))
242
243(defun cust-print-original-princ (object &optional stream)) ; dummy def
244
245;; Save emacs routines.
246(if (not (fboundp 'cust-print-original-prin1))
247    (mapcar 'cust-print-set-function-cell
248	    '((cust-print-original-prin1 prin1)
249	      (cust-print-original-princ princ)
250	      (cust-print-original-print print)
251	      (cust-print-original-prin1-to-string prin1-to-string)
252	      (cust-print-original-format format)
253	      (cust-print-original-message message)
254	      (cust-print-original-error error))))
255
256
257(defun custom-print-install ()
258  "Replace print functions with general, customizable, Lisp versions.
259The Emacs subroutines are saved away, and you can reinstall them
260by running `custom-print-uninstall'."
261  (interactive)
262  (mapcar 'cust-print-set-function-cell
263	  '((prin1 custom-prin1)
264	    (princ custom-princ)
265	    (print custom-print)
266	    (prin1-to-string custom-prin1-to-string)
267	    (format custom-format)
268	    (message custom-message)
269	    (error custom-error)
270	    ))
271  t)
272
273(defun custom-print-uninstall ()
274  "Reset print functions to their Emacs subroutines."
275  (interactive)
276  (mapcar 'cust-print-set-function-cell
277	  '((prin1 cust-print-original-prin1)
278	    (princ cust-print-original-princ)
279	    (print cust-print-original-print)
280	    (prin1-to-string cust-print-original-prin1-to-string)
281	    (format cust-print-original-format)
282	    (message cust-print-original-message)
283	    (error cust-print-original-error)
284	    ))
285  t)
286
287(defalias 'custom-print-funcs-installed-p 'custom-print-installed-p)
288(defun custom-print-installed-p ()
289  "Return t if custom-print is currently installed, nil otherwise."
290  (eq (symbol-function 'custom-prin1) (symbol-function 'prin1)))
291
292(put 'with-custom-print-funcs 'edebug-form-spec '(body))
293(put 'with-custom-print 'edebug-form-spec '(body))
294
295(defalias 'with-custom-print-funcs 'with-custom-print)
296(defmacro with-custom-print (&rest body)
297  "Temporarily install the custom print package while executing BODY."
298  `(unwind-protect
299       (progn
300	 (custom-print-install)
301	 ,@body)
302     (custom-print-uninstall)))
303
304
305;; Lisp replacements for prin1 and princ, and for some subrs that use them
306;;===============================================================
307;; - so far only the printing and formatting subrs.
308
309(defun custom-prin1 (object &optional stream)
310  "Output the printed representation of OBJECT, any Lisp object.
311Quoting characters are printed when needed to make output that `read'
312can handle, whenever this is possible.
313Output stream is STREAM, or value of `standard-output' (which see).
314
315This is the custom-print replacement for the standard `prin1'.  It
316uses the appropriate printer depending on the values of `print-level'
317and `print-circle' (which see)."
318  (cust-print-top-level object stream 'cust-print-original-prin1))
319
320
321(defun custom-princ (object &optional stream)
322  "Output the printed representation of OBJECT, any Lisp object.
323No quoting characters are used; no delimiters are printed around
324the contents of strings.
325Output stream is STREAM, or value of `standard-output' (which see).
326
327This is the custom-print replacement for the standard `princ'."
328  (cust-print-top-level object stream 'cust-print-original-princ))
329
330
331(defun custom-prin1-to-string (object &optional noescape)
332  "Return a string containing the printed representation of OBJECT,
333any Lisp object.  Quoting characters are used when needed to make output
334that `read' can handle, whenever this is possible, unless the optional
335second argument NOESCAPE is non-nil.
336
337This is the custom-print replacement for the standard `prin1-to-string'."
338  (let ((buf (get-buffer-create " *custom-print-temp*")))
339    ;; We must erase the buffer before printing in case an error
340    ;; occurred during the last prin1-to-string and we are in debugger.
341    (save-excursion
342      (set-buffer buf)
343      (erase-buffer))
344    ;; We must be in the current-buffer when the print occurs.
345    (if noescape
346	(custom-princ object buf)
347      (custom-prin1 object buf))
348    (save-excursion
349      (set-buffer buf)
350      (buffer-string)
351      ;; We could erase the buffer again, but why bother?
352      )))
353
354
355(defun custom-print (object &optional stream)
356  "Output the printed representation of OBJECT, with newlines around it.
357Quoting characters are printed when needed to make output that `read'
358can handle, whenever this is possible.
359Output stream is STREAM, or value of `standard-output' (which see).
360
361This is the custom-print replacement for the standard `print'."
362  (cust-print-original-princ "\n" stream)
363  (custom-prin1 object stream)
364  (cust-print-original-princ "\n" stream))
365
366
367(defun custom-format (fmt &rest args)
368  "Format a string out of a control-string and arguments.
369The first argument is a control string.  It, and subsequent arguments
370substituted into it, become the value, which is a string.
371It may contain %s or %d or %c to substitute successive following arguments.
372%s means print an argument as a string, %d means print as number in decimal,
373%c means print a number as a single character.
374The argument used by %s must be a string or a symbol;
375the argument used by %d, %b, %o, %x or %c must be a number.
376
377This is the custom-print replacement for the standard `format'.  It
378calls the Emacs `format' after first making strings for list,
379vector, or symbol args.  The format specification for such args should
380be `%s' in any case, so a string argument will also work.  The string
381is generated with `custom-prin1-to-string', which quotes quotable
382characters."
383  (apply 'cust-print-original-format fmt
384	 (mapcar (function (lambda (arg)
385			     (if (or (listp arg) (vectorp arg) (symbolp arg))
386				 (custom-prin1-to-string arg)
387			       arg)))
388		 args)))
389
390
391(defun custom-message (fmt &rest args)
392  "Print a one-line message at the bottom of the screen.
393The first argument is a control string.
394It may contain %s or %d or %c to print successive following arguments.
395%s means print an argument as a string, %d means print as number in decimal,
396%c means print a number as a single character.
397The argument used by %s must be a string or a symbol;
398the argument used by %d or %c must be a number.
399
400This is the custom-print replacement for the standard `message'.
401See `custom-format' for the details."
402  ;; It doesn't work to princ the result of custom-format as in:
403  ;; (cust-print-original-princ (apply 'custom-format fmt args))
404  ;; because the echo area requires special handling
405  ;; to avoid duplicating the output.
406  ;; cust-print-original-message does it right.
407  (apply 'cust-print-original-message  fmt
408	 (mapcar (function (lambda (arg)
409			     (if (or (listp arg) (vectorp arg) (symbolp arg))
410				 (custom-prin1-to-string arg)
411			       arg)))
412		 args)))
413
414
415(defun custom-error (fmt &rest args)
416  "Signal an error, making error message by passing all args to `format'.
417
418This is the custom-print replacement for the standard `error'.
419See `custom-format' for the details."
420  (signal 'error (list (apply 'custom-format fmt args))))
421
422
423
424;; Support for custom prin1 and princ
425;;=========================================
426
427;; Defs to quiet byte-compiler.
428(defvar circle-table)
429(defvar cust-print-current-level)
430
431(defun cust-print-original-printer (object))  ; One of the standard printers.
432(defun cust-print-low-level-prin (object))    ; Used internally.
433(defun cust-print-prin (object))              ; Call this to print recursively.
434
435(defun cust-print-top-level (object stream emacs-printer)
436  ;; Set up for printing.
437  (let ((standard-output (or stream standard-output))
438	;; circle-table will be non-nil if anything is circular.
439	(circle-table (and print-circle
440			   (cust-print-preprocess-circle-tree object)))
441	(cust-print-current-level (or print-level -1)))
442
443    (defalias 'cust-print-original-printer emacs-printer)
444    (defalias 'cust-print-low-level-prin
445      (cond
446       ((or custom-printers
447	    circle-table
448	    print-level			; comment out for version 19
449	    ;; Emacs doesn't use print-level or print-length
450	    ;; for vectors, but custom-print can.
451	    (if custom-print-vectors
452		(or print-level print-length)))
453	'cust-print-print-object)
454       (t 'cust-print-original-printer)))
455    (defalias 'cust-print-prin
456      (if circle-table 'cust-print-print-circular 'cust-print-low-level-prin))
457
458    (cust-print-prin object)
459    object))
460
461
462(defun cust-print-print-object (object)
463  ;; Test object type and print accordingly.
464  ;; Could be called as either cust-print-low-level-prin or cust-print-prin.
465  (cond
466   ((null object) (cust-print-original-printer object))
467   ((cust-print-use-custom-printer object) object)
468   ((consp object) (cust-print-list object))
469   ((vectorp object) (cust-print-vector object))
470   ;; All other types, just print.
471   (t (cust-print-original-printer object))))
472
473
474(defun cust-print-print-circular (object)
475  ;; Printer for `prin1' and `princ' that handles circular structures.
476  ;; If OBJECT appears multiply, and has not yet been printed,
477  ;; prefix with label; if it has been printed, use `#N#' instead.
478  ;; Otherwise, print normally.
479  (let ((tag (assq object circle-table)))
480    (if tag
481	(let ((id (cdr tag)))
482	  (if (> id 0)
483	      (progn
484		;; Already printed, so just print id.
485		(cust-print-original-princ "#")
486		(cust-print-original-princ id)
487		(cust-print-original-princ "#"))
488	    ;; Not printed yet, so label with id and print object.
489	    (setcdr tag (- id)) ; mark it as printed
490	    (cust-print-original-princ "#")
491	    (cust-print-original-princ (- id))
492	    (cust-print-original-princ "=")
493	    (cust-print-low-level-prin object)
494	    ))
495      ;; Not repeated in structure.
496      (cust-print-low-level-prin object))))
497
498
499;;================================================
500;; List and vector processing for print functions.
501
502(defun cust-print-list (list)
503  ;; Print a list using print-length, print-level, and print-circle.
504  (if (= cust-print-current-level 0)
505      (cust-print-original-princ "#")
506    (let ((cust-print-current-level (1- cust-print-current-level)))
507      (cust-print-original-princ "(")
508      (let ((length (or print-length 0)))
509
510	;; Print the first element always (even if length = 0).
511	(cust-print-prin (car list))
512	(setq list (cdr list))
513	(if list (cust-print-original-princ " "))
514	(setq length (1- length))
515
516	;; Print the rest of the elements.
517	(while (and list (/= 0 length))
518	  (if (and (listp list)
519		   (not (assq list circle-table)))
520	      (progn
521		(cust-print-prin (car list))
522		(setq list (cdr list)))
523
524	    ;; cdr is not a list, or it is in circle-table.
525	    (cust-print-original-princ ". ")
526	    (cust-print-prin list)
527	    (setq list nil))
528
529	  (setq length (1- length))
530	  (if list (cust-print-original-princ " ")))
531
532	(if (and list (= length 0)) (cust-print-original-princ "..."))
533	(cust-print-original-princ ")"))))
534  list)
535
536
537(defun cust-print-vector (vector)
538  ;; Print a vector according to print-length, print-level, and print-circle.
539  (if (= cust-print-current-level 0)
540      (cust-print-original-princ "#")
541    (let ((cust-print-current-level (1- cust-print-current-level))
542	  (i 0)
543	  (len (length vector)))
544      (cust-print-original-princ "[")
545
546      (if print-length
547	  (setq len (min print-length len)))
548      ;; Print the elements
549      (while (< i len)
550	(cust-print-prin (aref vector i))
551	(setq i (1+ i))
552	(if (< i (length vector)) (cust-print-original-princ " ")))
553
554      (if (< i (length vector)) (cust-print-original-princ "..."))
555      (cust-print-original-princ "]")
556      ))
557  vector)
558
559
560
561;; Circular structure preprocessing
562;;==================================
563
564(defun cust-print-preprocess-circle-tree (object)
565  ;; Fill up the table.
566  (let (;; Table of tags for each object in an object to be printed.
567	;; A tag is of the form:
568	;; ( <object> <nil-t-or-id-number> )
569	;; The id-number is generated after the entire table has been computed.
570	;; During walk through, the real circle-table lives in the cdr so we
571	;; can use setcdr to add new elements instead of having to setq the
572	;; variable sometimes (poor man's locf).
573	(circle-table (list nil)))
574    (cust-print-walk-circle-tree object)
575
576    ;; Reverse table so it is in the order that the objects will be printed.
577    ;; This pass could be avoided if we always added to the end of the
578    ;; table with setcdr in walk-circle-tree.
579    (setcdr circle-table (nreverse (cdr circle-table)))
580
581    ;; Walk through the table, assigning id-numbers to those
582    ;; objects which will be printed using #N= syntax.  Delete those
583    ;; objects which will be printed only once (to speed up assq later).
584    (let ((rest circle-table)
585	  (id -1))
586      (while (cdr rest)
587	(let ((tag (car (cdr rest))))
588	  (cond ((cdr tag)
589		 (setcdr tag id)
590		 (setq id (1- id))
591		 (setq rest (cdr rest)))
592		;; Else delete this object.
593		(t (setcdr rest (cdr (cdr rest))))))
594	))
595    ;; Drop the car.
596    (cdr circle-table)
597    ))
598
599
600
601(defun cust-print-walk-circle-tree (object)
602  (let (read-equivalent-p tag)
603    (while object
604      (setq read-equivalent-p
605	    (or (numberp object)
606		(and (symbolp object)
607		     ;; Check if it is uninterned.
608		     (eq object (intern-soft (symbol-name object)))))
609	    tag (and (not read-equivalent-p)
610		     (assq object (cdr circle-table))))
611      (cond (tag
612	     ;; Seen this object already, so note that.
613	     (setcdr tag t))
614
615	    ((not read-equivalent-p)
616	     ;; Add a tag for this object.
617	     (setcdr circle-table
618		     (cons (list object)
619			   (cdr circle-table)))))
620      (setq object
621	    (cond
622	     (tag ;; No need to descend since we have already.
623	      nil)
624
625	     ((consp object)
626	      ;; Walk the car of the list recursively.
627	      (cust-print-walk-circle-tree (car object))
628	      ;; But walk the cdr with the above while loop
629	      ;; to avoid problems with max-lisp-eval-depth.
630	      ;; And it should be faster than recursion.
631	      (cdr object))
632
633	     ((vectorp object)
634	      ;; Walk the vector.
635	      (let ((i (length object))
636		    (j 0))
637		(while (< j i)
638		  (cust-print-walk-circle-tree (aref object j))
639		  (setq j (1+ j))))))))))
640
641
642;; Example.
643;;=======================================
644
645'(progn
646   (progn
647     ;; Create some circular structures.
648     (setq circ-sym (let ((x (make-symbol "FOO"))) (list x x)))
649     (setq circ-list (list 'a 'b (vector 1 2 3 4) 'd 'e 'f))
650     (setcar (nthcdr 3 circ-list) circ-list)
651     (aset (nth 2 circ-list) 2 circ-list)
652     (setq dotted-circ-list (list 'a 'b 'c))
653     (setcdr (cdr (cdr dotted-circ-list)) dotted-circ-list)
654     (setq circ-vector (vector 1 2 3 4 (list 'a 'b 'c 'd) 6 7))
655     (aset circ-vector 5 (make-symbol "-gensym-"))
656     (setcar (cdr (aref circ-vector 4)) (aref circ-vector 5))
657     nil)
658
659   (install-custom-print)
660   ;; (setq print-circle t)
661
662   (let ((print-circle t))
663     (or (equal (prin1-to-string circ-list) "#1=(a b [1 2 #1# 4] #1# e f)")
664	 (error "circular object with array printing")))
665
666   (let ((print-circle t))
667     (or (equal (prin1-to-string dotted-circ-list) "#1=(a b c . #1#)")
668	 (error "circular object with array printing")))
669
670   (let* ((print-circle t)
671	  (x (list 'p 'q))
672	  (y (list (list 'a 'b) x 'foo x)))
673     (setcdr (cdr (cdr (cdr y))) (cdr y))
674     (or (equal (prin1-to-string y) "((a b) . #1=(#2=(p q) foo #2# . #1#))"
675		)
676	 (error "circular list example from CL manual")))
677
678   (let ((print-circle nil))
679     ;; cl-packages.el is required to print uninterned symbols like #:FOO.
680     ;; (require 'cl-packages)
681     (or (equal (prin1-to-string circ-sym) "(#:FOO #:FOO)")
682	 (error "uninterned symbols in list")))
683   (let ((print-circle t))
684     (or (equal (prin1-to-string circ-sym) "(#1=FOO #1#)")
685	 (error "circular uninterned symbols in list")))
686
687   (uninstall-custom-print)
688   )
689
690(provide 'cust-print)
691
692;;; arch-tag: 3a5a8650-622c-48c4-87d8-e01bf72ec580
693;;; cust-print.el ends here
694