Dimitre, could you please send me a repro for this? It's definitely a
bug but I can't easily reproduce it without the full stylesheet.
It's a bug related to tail call optimization. Functions whose body
consists solely of a sequence of xsl:param, xsl:variable, and
xsl:sequence are compiled differently from those that include
instructions like xsl:copy-of, with heavier optimization.
Thanks,
Michael Kay
-----Original Message-----
From: owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
[mailto:owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com] On Behalf Of
Dimitre Novatchev
Sent: 14 November 2003 21:43
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] [XSLT2] Different results using xsl:copy-of
and xsl:sequence with Saxon 7.8
I have this code:
func-allTrue.xsl:
------------------
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:fxl="http://fxsl.sf.net/";
xmlns:allTrue-And="allTrue-And"
exclude-result-prefixes="fxl xs allTrue-And"
<xsl:import href="func-foldl.xsl"/>
<xsl:function name="fxl:allTrue" as="xs:boolean" >
<xsl:param name="pList" as="xs:boolean*"/>
<xsl:variable name="vAnd"
select="document('')/*/allTrue-And:*[1]"/>
<xsl:copy-of select="fxl:foldl($vAnd, true(), $pList)"/>
</xsl:function>
<allTrue-And:allTrue-And/>
<xsl:template name="And" match="allTrue-And:*" as="xs:boolean">
<xsl:param name="arg1" as="xs:boolean"/>
<xsl:param name="arg2" as="xs:boolean"/>
<xsl:sequence select="$arg1 and $arg2"/>
</xsl:template>
</xsl:stylesheet>
This stylesheet defines an xsl:function fxl:allTrue
I apply the allTrue function as follows:
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:fxl="http://fxsl.sf.net/";
exclude-result-prefixes="fxl xs"
<xsl:import href="func-allTrue.xsl"/>
<xsl:output omit-xml-declaration="yes"/>
<!-- This transformation must be applied to:
boolNodes.xml
-->
<xsl:template match="/">
<xsl:variable name="allTrue"
select="fxl:allTrue(/*/*/text())"/>
<xsl:value-of select="$allTrue"/>
<xsl:if test="not($allTrue)">
<xsl:text>Not </xsl:text>
</xsl:if>
<xsl:value-of select="'all nodes contents are true in:'"/>
<xsl:text>
</xsl:text>
<xsl:copy-of select="/*/*"/>
</xsl:template>
</xsl:stylesheet>
When applied on this source.xml:
<t>
<a>1</a>
<b>1</b>
<c>0</c>
<d>1</d>
</t>
the correct result is produced:
falseNot all nodes contents are true in:
<a>1</a><b>1</b><c>0</c><d>1</d>
The problem:
In the code of allTrue I replace xsl:copy-of with
xsl:sequence like this:
<xsl:copy-of select="fxl:foldl($vAnd, true(), $pList)"/>
with
<xsl:sequence select="fxl:foldl($vAnd, true(), $pList)"/>
I run the same test again and get a dynamic error:
"Dynamic error in function fxl:allTrue
Dynamic error in function fxl:allTrue
Error at variable on line 17 of
file:/E:/xml/msxml/XML%20SDK/Samples/Tests/Generic/FP/Fxsl/XSL
T2/marrowtr.xsl:
Required type of result of function fxl:allTrue is xs:boolean;
supplied value is java:java.lang.Object Transformation failed: Run-time
errors were reported"
My questions:
What is actually happening here? Is this difference in the behaviour of
xsl:copy and xsl:sequence documented in the WD? Am I not understanding
and using xsl:sequence in a correct way or is this a bug in the XSLT
processor?
=====
Cheers,
Dimitre Novatchev.
http://fxsl.sourceforge.net/ -- the home of FXSL
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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