User-defined functions are designed to be context-free: all arguments have
to be passed explicitly, and they have no access to the context item at the
point of the call. In this sense they differ from system-defined functions
like name() and position().
The reason for this is to allow optimizations of the kind that are common in
functional programming languages. It is a bit inconsistent though.
Thanks for the nice words about Saxon.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Joern Nettingsmeier [mailto:nettings(_at_)folkwang-hochschule(_dot_)de]
Sent: 26 February 2006 16:41
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] parameter default for xsl:function?
hi!
i'm playing around with xsl 2.0 atm, and i'm wondering: is it
possible
to define functions that operate on a node in such a way that they
default to the current one if the parameter list is empty?
"current()" inside a function is not the way to do it, since saxon
complains that there is no context item defined at this point, which
sounds convincing ;)
i remember reading in the spec that both polymorphism and
variable-length argument lists are not supported, but i
wonder: how do
the internal xpath 1.0 functions do it? e.g.:
concat(<string>, <string> [,<string>]+)
name([<node>])
btw, xsl 2 is really a huge improvement, thanks a bunch to all
contributors, and to dr. kay for the saxon implementation!
regards,
jörn
--
jörn nettingsmeier
home://germany/45128 essen/lortzingstr. 11/
http://spunk.dnsalias.org
phone://+49/201/491621
if you are a free (as in "free speech") software developer
and you happen to be travelling near my home, drop me a line
and come round for a free (as in "free beer") beer. :-D
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail:
<mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--
--~------------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
To unsubscribe, go to: http://lists.mulberrytech.com/xsl-list/
or e-mail: <mailto:xsl-list-unsubscribe(_at_)lists(_dot_)mulberrytech(_dot_)com>
--~--