id	summary	reporter	owner	description	type	status	priority	milestone	component	resolution	keywords	cc	planetversion	pltversion
303	xpath-parser.ss problem w/ abbreviated xpath syntax	dmarshall207@…	lizorkin	"Hi, I'm somewhat new and did not notice the ticket
feature so I sent this report in yesterday to email
addresses listed in the source code.

I thought I'd resend it here again as it's probably
better protocol:

subject : bug in xpath-parser.ss

First, thank you for all the OS PLT-Scheme -- errr
I mean, Racket code.  I love this stuff.

There seams to be a problem with some special cases for
abbreviated xpath syntax -- looks like absolute paths
have problems with xpaths that start with one of : 
""div"", ""mod"", ""and"", ""or"".  
(could be that I just don't understand the specs)

examples to illustrate :

;;----------------------------------------------------
;; Works :
(let*([data    '(*TOP*
                (*PI* xml ""version='1.0'"")
                (one ""111""
                     (two ""222"")))])
 (list
   (eval-xpath ""/one"" data)
   (eval-xpath ""/one/two"" data)))

;;----------------------------------------------------
;; Fails :
(let*([data    '(*TOP*
                (*PI* xml ""version='1.0'"")
                (div ""111""
                     (two ""222"")))])
 (eval-xpath ""/div"" data))

;; Error Message :
;;   XPath/XPointer parser error: unexpected end of XPath
;;   expression. Expected - NCName procedure application: expected
;;   procedure, given: #f; arguments were: (*TOP* (*PI*
;;   xml ""version='1.0'"") (div ""111"" (two ""222"")))

;;----------------------------------------------------
;; Fails :
(let*([data    '(*TOP*
                (*PI* xml ""version='1.0'"")
                (div ""111""
                     (two ""222"")))])
 (eval-xpath ""/div/two"" data))

;; Error Message :
;;    /: division by zero

;;------------------------------------------------------------------
;; Works :
(let*([data    '(*TOP*
                (*PI* xml ""version='1.0'"")
                (div ""111""
                     (two ""222"")))])
 (list
   (eval-xpath ""div/two"" data)
   (eval-xpath ""/child::div"" data)
   (eval-xpath ""/child::div/two"" data)))


Davis Marshall
"	defect	new	minor		lizorkin/sxml.plt				(2 1)	4.2.1.1