RSS 2.0
Sign In
# Saturday, May 1, 2010

To see that the problem with Generator functions in xslt is a bit more complicated compare two functions.

The first one is quoted from the earlier post:

  <xsl:function name="t:generate" as="xs:integer*">
    <xsl:param name="value" as="xs:integer"/>

    <xsl:sequence select="$value"/>
    <xsl:sequence select="t:generate($value * 2)"/>
  </xsl:function>

It does not work in Saxon: crashes with out of memory.

The second one is slightly modified version of the same function:

  <xsl:function name="t:generate" as="xs:integer*">
    <xsl:param name="value" as="xs:integer"/>

    <xsl:sequence select="$value + 0"/>
    <xsl:sequence select="t:generate($value * 2)"/>
  </xsl:function>

It's working without problems. In first case Saxon decides to cache all function's output, in the second case it decides to evaluate data lazily on demand.

It seems that optimization algorithms implemented in Saxon are so plentiful and complex that at times they fool one another. :-)

See also: Generator functions

Saturday, May 1, 2010 7:18:24 AM UTC  #    Comments [0] -
Thinking aloud | Tips and tricks | xslt
All comments require the approval of the site owner before being displayed.
Name
E-mail
Home page

Comment (Some html is allowed: a@href@title, b, blockquote@cite, em, i, strike, strong, sub, super, u) where the @ means "attribute." For example, you can use <a href="" title=""> or <blockquote cite="Scott">.  

[Captcha]Enter the code shown (prevents robots):

Live Comment Preview
Archive
<October 2019>
SunMonTueWedThuFriSat
293012345
6789101112
13141516171819
20212223242526
272829303112
3456789
Statistics
Total Posts: 366
This Year: 2
This Month: 0
This Week: 0
Comments: 226
Locations of visitors to this page
Disclaimer
The opinions expressed herein are our own personal opinions and do not represent our employer's view in anyway.

© 2019, Nesterovsky bros
All Content © 2019, Nesterovsky bros
DasBlog theme 'Business' created by Christoph De Baene (delarou)