369522 - XPath abbreviated steps should not support predicates

Status: RESOLVED DUPLICATE of bug 164822

(Core :: DOM: Core & HTML, defect)

Description

[Alexey Proskuryakov]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X; ru-ru) AppleWebKit/418.9 (KHTML, like Gecko) Safari/419.3
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.9a2pre) Gecko/20070206 Minefield/3.0a2pre

As far as I can tell, XPath syntax such as ".[@class='test']" is invalid in XPath 1.0, so I think that XPathEvaluator::evaluate() should raise an exception when trying to compile it. However, I'm not getting any exception in the attached test case.

Below is why I think that the syntax is invalid.

See rule 4 - an abbreviated step cannot have predicates.

[4] Step ::= AxisSpecifier NodeTest Predicate*  
             | AbbreviatedStep

Also, see rule 20 - since "." is not a PrimaryExpr, it cannot start a FilterExpr either.

[20] FilterExpr ::= PrimaryExpr
                    | FilterExpr Predicate

Reproducible: Always

Comment 1

[Alexey Proskuryakov]

Attachment: test case