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Re: [xsl] a sequence of regex-group()

Subject: Re: [xsl] a sequence of regex-group()
From: "G. Ken Holman g.ken.holman@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Oct 2015 16:02:54 -0000

At 2015-10-28 15:20 +0000, Geert Bormans geert@xxxxxxxxxxxxxxxxxxx wrote:
Hi all,

sanity check

If I wanted a sequence of all the regex-group() values available in a matching-substring...

(This is inside a function and the actual regex $re is passed in as a param, so number of item() is unknown)

I expected this to be somewhat more straightforward than this, so I check

<xsl:variable name="group-count" select="string-length(replace($re, '[^\(]+', ''))"/>
<xsl:analyze-string select="$str" regex="{$re}">
<xsl:variable name="re-groups" select="for $i in 1 to $group-count return regex-group($i)" as="item()*"/>

Any thoughts?

Would it not be easier to somehow deal with the current context list? Remember that analyze-string sets position() and last() for a sequence of matched and non-matched strings.

T:\>type temp.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

<xsl:template match="/">
  <xsl:analyze-string select="'a b c d e'" regex="\w">
      <xsl:value-of select=".,position(),last(),'&#xa;'"/>
      <xsl:value-of select=".,position(),last(),'&#xa;'"/>

T:\>xslt2 temp.xsl temp.xsl
<?xml version="1.0" encoding="UTF-8"?>
a 1 9
  2 9
b 3 9
  4 9
c 5 9
  6 9
d 7 9
  8 9
e 9 9

I haven't looked at it in detail, but could you not determine the group count from the size of the context list? Perhaps not, if you don't know if the first or last is matching or non-matching.

I hope this becomes helpful. I am on a conference call and sneaking in this response.

. . . . . . . . Ken

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