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;;;; test of the pretty-printer
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; While most of SBCL is derived from the CMU CL system, the test
;;;; files (like this one) were written from scratch after the fork
;;;; from CMU CL.
;;;;
;;;; This software is in the public domain and is provided with
;;;; absolutely no warranty. See the COPYING and CREDITS files for
;;;; more information.
(in-package :cl-user)
;;;; tests for former BUG 99, where pretty-printing was pretty messed
;;;; up, e.g. PPRINT-LOGICAL-BLOCK - because of CHECK-FOR-CIRCULARITY
;;;; - didn't really work:
;;;; "DESCRIBE interacts poorly with *PRINT-CIRCLE*, e.g. the output from
;;;; (let ((*print-circle* t)) (describe (make-hash-table)))
;;;; is weird, [...] #<HASH-TABLE :TEST EQL :COUNT 0 {90BBFC5}> is an . (EQL)
;;;; ..."
;;;; So, this was mainly a pretty printing problem.
;;; Create a circular list.
(eval-when (:compile-toplevel :load-toplevel :execute)
(defparameter *circ-list* '(1 1))
(prog1 nil
(setf (cdr *circ-list*) *circ-list*)))
;;; I think this test is bogus. PPRINT-LOGICAL-BLOCK needs to print
;;; the #1= and mark *CIRC-LIST* as having been printed for the first
;;; time. After that any attempt to print *CIRC-LIST* must result in
;;; in a #1# being printed. Thus the right output is (for once)
;;; #1=#1#. -- JES, 2005-06-05
#+nil
;;; circular lists are still being printed correctly?
(assert (equal
(with-output-to-string (*standard-output*)
(let ((*print-circle* t))
(pprint-logical-block (*standard-output* *circ-list*)
(format *standard-output* "~S" *circ-list*))))
"#1=(1 . #1#)"))
;;; test from CLHS
(with-test (:name :pprint-clhs-example)
(assert (equal
(with-output-to-string (*standard-output*)
(let ((a (list 1 2 3)))
(setf (cdddr a) a)
(let ((*print-circle* t))
(write a :stream *standard-output*))
:done))
"#1=(1 2 3 . #1#)")))
(with-test (:name (:pprint :bug-99))
(assert (equal
(with-output-to-string (*standard-output*)
(let* ((*print-circle* t))
(format *standard-output* "~@<~S ~_is ~S. This was not seen!~:>"
'eql 'eql)))
"EQL is EQL. This was not seen!"))
(assert (equal
(with-output-to-string (*standard-output*)
(let* ((*print-circle* t))
(format *standard-output*
"~@<~S ~_is ~S and ~S. This was not seen!~:>"
'eql 'eql 'eql)))
"EQL is EQL and EQL. This was not seen!")))
;;; the original test for BUG 99 (only interactive), no obvious
;;; way to make an automated test:
;;; (LET ((*PRINT-CIRCLE* T)) (DESCRIBE (MAKE-HASH-TABLE)))
;;; bug 263: :PREFIX, :PER-LINE-PREFIX and :SUFFIX arguments of
;;; PPRINT-LOGICAL-BLOCK may be complex strings
(with-test (:name :pprint-logical-block-arguments-complex-strings)
(let ((list '(1 2 3))
(prefix (make-array 2
:element-type 'character
:displaced-to ";x"
:fill-pointer 1))
(suffix (make-array 2
:element-type 'character
:displaced-to ">xy"
:displaced-index-offset 1
:fill-pointer 1)))
(assert (equal (with-output-to-string (s)
(pprint-logical-block (s list
:per-line-prefix prefix
:suffix suffix)
(format s "~{~W~^~:@_~}" list)))
(format nil ";1~%~
;2~%~
;3x")))))
;;; bug 141b: not enough care taken to disambiguate ,.FOO and ,@FOO
;;; from , .FOO and , @FOO
(with-test (:name :pprint-backquote-magic)
(assert (equal
(with-output-to-string (s)
(write '`(, .foo) :stream s :pretty t :readably t))
"`(, .FOO)"))
(assert (equal
(with-output-to-string (s)
(write '`(, @foo) :stream s :pretty t :readably t))
"`(, @FOO)"))
(assert (equal
(with-output-to-string (s)
(write '`(, ?foo) :stream s :pretty t :readably t))
"`(,?FOO)")))
;;; bug reported by Paul Dietz on sbcl-devel: unquoted lambda lists
;;; were leaking the SB-IMPL::BACKQ-COMMA implementation.
(with-test (:name :pprint-leaking-backq-comma)
(assert (equal
(with-output-to-string (s)
(write '`(foo ,x) :stream s :pretty t :readably t))
"`(FOO ,X)"))
(assert (equal
(with-output-to-string (s)
(write '`(foo ,@x) :stream s :pretty t :readably t))
"`(FOO ,@X)"))
#+nil ; '`(foo ,.x) => '`(foo ,@x) apparently.
(assert (equal
(with-output-to-string (s)
(write '`(foo ,.x) :stream s :pretty t :readably t))
"`(FOO ,.X)"))
(assert (equal
(with-output-to-string (s)
(write '`(lambda ,x) :stream s :pretty t :readably t))
"`(LAMBDA ,X)"))
(assert (equal
(with-output-to-string (s)
(write '`(lambda ,@x) :stream s :pretty t :readably t))
"`(LAMBDA ,@X)"))
#+nil ; see above
(assert (equal
(with-output-to-string (s)
(write '`(lambda ,.x) :stream s :pretty t :readably t))
"`(LAMBDA ,.X)"))
(assert (equal
(with-output-to-string (s)
(write '`(lambda (,x)) :stream s :pretty t :readably t))
"`(LAMBDA (,X))")))
;;; more backquote printing brokenness, fixed quasi-randomly by CSR.
;;; NOTE KLUDGE FIXME: because our backquote optimizes at read-time,
;;; these assertions, like the ones above, are fragile. Likewise, it
;;; is very possible that at some point READABLY printing backquote
;;; expressions will have to change to printing the low-level conses,
;;; since the magical symbols are accessible though (car '`(,foo)) and
;;; friends. HATE HATE HATE. -- CSR, 2004-06-10
(with-test (:name :pprint-more-backquote-brokeness)
(flet ((try (input expect)
(assert (equalp (read-from-string expect) input))
(let ((actual (write-to-string input :pretty t)))
(unless (equal actual expect)
(error "Failed test for ~S. Got ~S~%"
expect actual)))))
(try '``(foo ,@',@bar) "``(FOO ,@',@BAR)")
(try '``(,,foo ,',foo foo) "``(,,FOO ,',FOO FOO)")
(try '``(((,,foo) ,',foo) foo) "``(((,,FOO) ,',FOO) FOO)")
(try '`#() "`#()")
(try '`#(,bar) "`#(,BAR)")
(try '`#(,(bar)) "`#(,(BAR))")
(try '`#(,@bar) "`#(,@BAR)")
(try '`#(,@(bar)) "`#(,@(BAR))")
(try '`#(a ,b c) "`#(A ,B C)")
(try '`#(,@A ,b c) "`#(,@A ,B C)")
(try '`(,a . #(foo #() #(,bar) ,bar)) "`(,A . #(FOO #() #(,BAR) ,BAR))")
(try '(let ((foo (x))) `(let (,foo) (setq ,foo (y)) (baz ,foo)))
;; PPRINT-LET emits a mandatory newline after the bindings,
;; otherwise this'd fit on one line given an adequate right margin.
"(LET ((FOO (X)))
`(LET (,FOO)
(SETQ ,FOO (Y))
(BAZ ,FOO)))")))
;;; SET-PPRINT-DISPATCH should accept function name arguments, and not
;;; rush to coerce them to functions.
(set-pprint-dispatch '(cons (eql frob)) 'ppd-function-name)
(defun ppd-function-name (s o)
(print (length o) s))
(with-test (:name (:set-pprint-dispatch :no-function-coerce)))
(let ((s (with-output-to-string (s)
(pprint '(frob a b) s))))
(assert (position #\3 s)))
;; Test that circularity detection works with pprint-logical-block
;; (including when called through pprint-dispatch).
(with-test (:name :pprint-circular-detection)
(let ((*print-pretty* t)
(*print-circle* t)
(*print-pprint-dispatch* (copy-pprint-dispatch)))
(labels ((pprint-a (stream form &rest rest)
(declare (ignore rest))
(pprint-logical-block (stream form :prefix "<" :suffix ">")
(pprint-exit-if-list-exhausted)
(loop
(write (pprint-pop) :stream stream)
(pprint-exit-if-list-exhausted)
(write-char #\space stream)))))
(set-pprint-dispatch '(cons (eql a)) #'pprint-a)
(assert (string= "<A 1 2 3>"
(with-output-to-string (s)
(write '(a 1 2 3) :stream s))))
(assert (string= "#1=<A 1 #1# #2=#(2) #2#>"
(with-output-to-string (s)
(write '#2=(a 1 #2# #5=#(2) #5#) :stream s))))
(assert (string= "#1=(B #2=<A 1 #1# 2 3> #2#)"
(with-output-to-string (s)
(write '#3=(b #4=(a 1 #3# 2 3) #4#) :stream s)))))))
;; Test that a circular improper list inside a logical block works.
(with-test (:name :pprint-circular-improper-lists-inside-logical-blocks)
(let ((*print-circle* t)
(*print-pretty* t))
(assert (string= "#1=(#2=(#2# . #3=(#1# . #3#)))"
(with-output-to-string (s)
(write '#1=(#2=(#2# . #3=(#1# . #3#))) :stream s))))))
;;; Printing malformed defpackage forms without errors.
(with-test (:name :pprint-defpackage)
(let ((*standard-output* (make-broadcast-stream)))
(pprint '(defpackage :foo nil))
(pprint '(defpackage :foo 42))))
(with-test (:name :standard-pprint-dispatch-modified)
(assert
(eq :error
(handler-case (with-standard-io-syntax
(set-pprint-dispatch 'symbol (constantly nil))
:no-error)
(sb-int:standard-pprint-dispatch-table-modified-error ()
:error)))))
(with-test (:name :pprint-defmethod-lambda-list-function)
(flet ((to-string (form)
(let ((string (with-output-to-string (s) (pprint form s))))
(assert (eql #\newline (char string 0)))
(subseq string 1))))
(assert (equal "(DEFMETHOD FOO ((FUNCTION CONS)) FUNCTION)"
(to-string `(defmethod foo ((function cons)) function))))
(assert (equal "(DEFMETHOD FOO :AFTER (FUNCTION CONS) FUNCTION)"
(to-string `(defmethod foo :after (function cons) function))))))
(defclass frob () ())
(defmethod print-object ((obj frob) stream)
(print-unreadable-object (obj stream :type nil :identity nil)
(format stream "FRABOTZICATOR")))
;;; SBCL < 1.0.38 printed #<\nFRABOTIZICATOR>
(with-test (:name (:pprint-unreadable-object :no-ugliness-when-type=nil))
(assert (equal "#<FRABOTZICATOR>"
(let ((*print-right-margin* 5)
(*print-pretty* t))
(format nil "~@<~S~:>" (make-instance 'frob))))))
(with-test (:name :pprint-logical-block-code-deletion-node)
(handler-case
(compile nil
`(lambda (words &key a b c)
(pprint-logical-block (nil words :per-line-prefix (or a b c))
(pprint-fill *standard-output* (sort (copy-seq words) #'string<) nil))))
((or sb-ext:compiler-note warning) (c)
(error e))))
(with-test (:name :pprint-logical-block-multiple-per-line-prefix-eval)
(funcall (compile nil
`(lambda ()
(let ((n 0))
(with-output-to-string (s)
(pprint-logical-block (s nil :per-line-prefix (if (eql 1 (incf n))
"; "
(error "oops")))
(pprint-newline :mandatory s)
(pprint-newline :mandatory s)))
n)))))
(with-test (:name :can-restore-orig-pprint-dispatch-table)
(let* ((orig (pprint-dispatch 'some-symbol))
(alt (lambda (&rest args) (apply orig args))))
(set-pprint-dispatch 'symbol alt)
(assert (eq alt (pprint-dispatch 'some-symbol)))
(setf *print-pprint-dispatch* (copy-pprint-dispatch nil))
(assert (eq orig (pprint-dispatch 'some-symbol)))
(assert (not (eq alt orig)))))
(with-test (:name :pprint-improper-list)
(let* ((max-length 10)
(stream (make-broadcast-stream))
(errors
(loop for symbol being the symbol in :cl
nconc
(loop for i from 1 below max-length
for list = (cons symbol 10) then (cons symbol list)
when (nth-value 1 (ignore-errors (pprint list stream)))
collect (format nil "(~{~a ~}~a . 10)" (butlast list) symbol)))))
(when errors
(error "Can't PPRINT improper lists: ~a" errors))))
(with-test (:name :pprint-circular-backq-comma)
;; LP 1161218 reported by James M. Lawrence
(let ((string (write-to-string '(let ((#1=#:var '(99)))
`(progn ,@(identity #1#)))
:circle t :pretty t)))
(assert (not (search "#2#" string)))))
(with-test (:name :pprint-dotted-setf)
(let ((*print-pretty* t))
(equal (format nil "~a" '(setf . a))
"(SETF . A)")))
(with-test (:name :literal-fun-nested-lists)
(assert (search "EQUALP" (format nil "~:w" `((((((,#'equalp)))))))
:test #'char-equal)))
;;; success