1 ;;;; test of the pretty-printer
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; While most of SBCL is derived from the CMU CL system, the test
7 ;;;; files (like this one) were written from scratch after the fork
10 ;;;; This software is in the public domain and is provided with
11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
12 ;;;; more information.
16 ;;;; tests for former BUG 99, where pretty-printing was pretty messed
17 ;;;; up, e.g. PPRINT-LOGICAL-BLOCK - because of CHECK-FOR-CIRCULARITY
18 ;;;; - didn't really work:
19 ;;;; "DESCRIBE interacts poorly with *PRINT-CIRCLE*, e.g. the output from
20 ;;;; (let ((*print-circle* t)) (describe (make-hash-table)))
21 ;;;; is weird, [...] #<HASH-TABLE :TEST EQL :COUNT 0 {90BBFC5}> is an . (EQL)
23 ;;;; So, this was mainly a pretty printing problem.
25 ;;; Create a circular list.
26 (eval-when (:compile-toplevel :load-toplevel :execute)
27 (defparameter *circ-list* '(1 1))
29 (setf (cdr *circ-list*) *circ-list*)))
31 ;;; I think this test is bogus. PPRINT-LOGICAL-BLOCK needs to print
32 ;;; the #1= and mark *CIRC-LIST* as having been printed for the first
33 ;;; time. After that any attempt to print *CIRC-LIST* must result in
34 ;;; in a #1# being printed. Thus the right output is (for once)
35 ;;; #1=#1#. -- JES, 2005-06-05
37 ;;; circular lists are still being printed correctly?
39 (with-output-to-string (*standard-output*)
40 (let ((*print-circle* t))
41 (pprint-logical-block (*standard-output* *circ-list*)
42 (format *standard-output* "~S" *circ-list*))))
46 (with-test (:name :pprint-clhs-example)
48 (with-output-to-string (*standard-output*)
49 (let ((a (list 1 2 3)))
51 (let ((*print-circle* t))
52 (write a :stream *standard-output*))
56 (with-test (:name (:pprint :bug-99))
58 (with-output-to-string (*standard-output*)
59 (let* ((*print-circle* t))
60 (format *standard-output* "~@<~S ~_is ~S. This was not seen!~:>"
62 "EQL is EQL. This was not seen!"))
65 (with-output-to-string (*standard-output*)
66 (let* ((*print-circle* t))
67 (format *standard-output*
68 "~@<~S ~_is ~S and ~S. This was not seen!~:>"
70 "EQL is EQL and EQL. This was not seen!")))
72 ;;; the original test for BUG 99 (only interactive), no obvious
73 ;;; way to make an automated test:
74 ;;; (LET ((*PRINT-CIRCLE* T)) (DESCRIBE (MAKE-HASH-TABLE)))
76 ;;; bug 263: :PREFIX, :PER-LINE-PREFIX and :SUFFIX arguments of
77 ;;; PPRINT-LOGICAL-BLOCK may be complex strings
78 (with-test (:name :pprint-logical-block-arguments-complex-strings)
81 :element-type 'character
85 :element-type 'character
87 :displaced-index-offset 1
89 (assert (equal (with-output-to-string (s)
90 (pprint-logical-block (s list
91 :per-line-prefix prefix
93 (format s "~{~W~^~:@_~}" list)))
98 ;;; bug 141b: not enough care taken to disambiguate ,.FOO and ,@FOO
99 ;;; from , .FOO and , @FOO
100 (with-test (:name :pprint-backquote-magic)
102 (with-output-to-string (s)
103 (write '`(, .foo) :stream s :pretty t :readably t))
106 (with-output-to-string (s)
107 (write '`(, @foo) :stream s :pretty t :readably t))
110 (with-output-to-string (s)
111 (write '`(, ?foo) :stream s :pretty t :readably t))
114 ;;; bug reported by Paul Dietz on sbcl-devel: unquoted lambda lists
115 ;;; were leaking the SB-IMPL::BACKQ-COMMA implementation.
116 (with-test (:name :pprint-leaking-backq-comma)
118 (with-output-to-string (s)
119 (write '`(foo ,x) :stream s :pretty t :readably t))
122 (with-output-to-string (s)
123 (write '`(foo ,@x) :stream s :pretty t :readably t))
125 #+nil ; '`(foo ,.x) => '`(foo ,@x) apparently.
127 (with-output-to-string (s)
128 (write '`(foo ,.x) :stream s :pretty t :readably t))
131 (with-output-to-string (s)
132 (write '`(lambda ,x) :stream s :pretty t :readably t))
135 (with-output-to-string (s)
136 (write '`(lambda ,@x) :stream s :pretty t :readably t))
140 (with-output-to-string (s)
141 (write '`(lambda ,.x) :stream s :pretty t :readably t))
144 (with-output-to-string (s)
145 (write '`(lambda (,x)) :stream s :pretty t :readably t))
148 ;;; more backquote printing brokenness, fixed quasi-randomly by CSR.
149 ;;; NOTE KLUDGE FIXME: because our backquote optimizes at read-time,
150 ;;; these assertions, like the ones above, are fragile. Likewise, it
151 ;;; is very possible that at some point READABLY printing backquote
152 ;;; expressions will have to change to printing the low-level conses,
153 ;;; since the magical symbols are accessible though (car '`(,foo)) and
154 ;;; friends. HATE HATE HATE. -- CSR, 2004-06-10
155 (with-test (:name :pprint-more-backquote-brokeness)
157 (with-output-to-string (s)
158 (write '``(foo ,@',@bar) :stream s :pretty t))
161 (with-output-to-string (s)
162 (write '``(,,foo ,',foo foo) :stream s :pretty t))
163 "``(,,FOO ,',FOO FOO)"))
165 (with-output-to-string (s)
166 (write '``(((,,foo) ,',foo) foo) :stream s :pretty t))
167 "``(((,,FOO) ,',FOO) FOO)")))
169 ;;; SET-PPRINT-DISPATCH should accept function name arguments, and not
170 ;;; rush to coerce them to functions.
171 (set-pprint-dispatch '(cons (eql frob)) 'ppd-function-name)
172 (defun ppd-function-name (s o)
173 (print (length o) s))
175 (with-test (:name (:set-pprint-dispatch :no-function-coerce)))
176 (let ((s (with-output-to-string (s)
177 (pprint '(frob a b) s))))
178 (assert (position #\3 s)))
180 ;; Test that circularity detection works with pprint-logical-block
181 ;; (including when called through pprint-dispatch).
182 (with-test (:name :pprint-circular-detection)
183 (let ((*print-pretty* t)
185 (*print-pprint-dispatch* (copy-pprint-dispatch)))
186 (labels ((pprint-a (stream form &rest rest)
187 (declare (ignore rest))
188 (pprint-logical-block (stream form :prefix "<" :suffix ">")
189 (pprint-exit-if-list-exhausted)
191 (write (pprint-pop) :stream stream)
192 (pprint-exit-if-list-exhausted)
193 (write-char #\space stream)))))
194 (set-pprint-dispatch '(cons (eql a)) #'pprint-a)
195 (assert (string= "<A 1 2 3>"
196 (with-output-to-string (s)
197 (write '(a 1 2 3) :stream s))))
198 (assert (string= "#1=<A 1 #1# #2=#(2) #2#>"
199 (with-output-to-string (s)
200 (write '#2=(a 1 #2# #5=#(2) #5#) :stream s))))
201 (assert (string= "#1=(B #2=<A 1 #1# 2 3> #2#)"
202 (with-output-to-string (s)
203 (write '#3=(b #4=(a 1 #3# 2 3) #4#) :stream s)))))))
205 ;; Test that a circular improper list inside a logical block works.
206 (with-test (:name :pprint-circular-improper-lists-inside-logical-blocks)
207 (let ((*print-circle* t)
209 (assert (string= "#1=(#2=(#2# . #3=(#1# . #3#)))"
210 (with-output-to-string (s)
211 (write '#1=(#2=(#2# . #3=(#1# . #3#))) :stream s))))))
213 ;;; Printing malformed defpackage forms without errors.
214 (with-test (:name :pprint-defpackage)
215 (let ((*standard-output* (make-broadcast-stream)))
216 (pprint '(defpackage :foo nil))
217 (pprint '(defpackage :foo 42))))
219 (with-test (:name :standard-pprint-dispatch-modified)
222 (handler-case (with-standard-io-syntax
223 (set-pprint-dispatch 'symbol (constantly nil))
225 (sb-int:standard-pprint-dispatch-table-modified-error ()
228 (with-test (:name :pprint-defmethod-lambda-list-function)
229 (flet ((to-string (form)
230 (let ((string (with-output-to-string (s) (pprint form s))))
231 (assert (eql #\newline (char string 0)))
233 (assert (equal "(DEFMETHOD FOO ((FUNCTION CONS)) FUNCTION)"
234 (to-string `(defmethod foo ((function cons)) function))))
235 (assert (equal "(DEFMETHOD FOO :AFTER (FUNCTION CONS) FUNCTION)"
236 (to-string `(defmethod foo :after (function cons) function))))))
238 (defclass frob () ())
240 (defmethod print-object ((obj frob) stream)
241 (print-unreadable-object (obj stream :type nil :identity nil)
242 (format stream "FRABOTZICATOR")))
244 ;;; SBCL < 1.0.38 printed #<\nFRABOTIZICATOR>
245 (with-test (:name (:pprint-unreadable-object :no-ugliness-when-type=nil))
246 (assert (equal "#<FRABOTZICATOR>"
247 (let ((*print-right-margin* 5)
249 (format nil "~@<~S~:>" (make-instance 'frob))))))
251 (with-test (:name :pprint-logical-block-code-deletion-node)
254 `(lambda (words &key a b c)
255 (pprint-logical-block (nil words :per-line-prefix (or a b c))
256 (pprint-fill *standard-output* (sort (copy-seq words) #'string<) nil))))
257 ((or sb-ext:compiler-note warning) (c)
260 (with-test (:name :pprint-logical-block-multiple-per-line-prefix-eval)
261 (funcall (compile nil
264 (with-output-to-string (s)
265 (pprint-logical-block (s nil :per-line-prefix (if (eql 1 (incf n))
268 (pprint-newline :mandatory s)
269 (pprint-newline :mandatory s)))
272 (with-test (:name :can-restore-orig-pprint-dispatch-table)
273 (let* ((orig (pprint-dispatch 'some-symbol))
274 (alt (lambda (&rest args) (apply orig args))))
275 (set-pprint-dispatch 'symbol alt)
276 (assert (eq alt (pprint-dispatch 'some-symbol)))
277 (setf *print-pprint-dispatch* (copy-pprint-dispatch nil))
278 (assert (eq orig (pprint-dispatch 'some-symbol)))
279 (assert (not (eq alt orig)))))
281 (with-test (:name :pprint-improper-list)
282 (let* ((max-length 10)
283 (stream (make-broadcast-stream))
285 (loop for symbol being the symbol in :cl
287 (loop for i from 1 below max-length
288 for list = (cons symbol 10) then (cons symbol list)
289 when (nth-value 1 (ignore-errors (pprint list stream)))
290 collect (format nil "(~{~a ~}~a . 10)" (butlast list) symbol)))))
292 (error "Can't PPRINT imporper lists: ~a" errors))))
294 (with-test (:name :pprint-circular-backq-comma)
295 ;; LP 1161218 reported by James M. Lawrence
296 (let ((string (write-to-string '(let ((#1=#:var '(99)))
297 `(progn ,@(identity #1#)))
298 :circle t :pretty t)))
299 (assert (not (search "#2#" string)))))