[OT] JSP 2.0 tag files and expressions

[Laurie Harper]

Sorry for the off-topic post but I'm sure someone here will be able to 
tell me what's going on with this... I'm trying to use the JSTL forEach 
tag in a tag file invoked by another tag file and I'm getting an error. 
Here's an example piece of JSP:

  <c:forEach var="v" begin="0" end="${2 + 2}">
    <p>v: ${v}</p>
  </c:forEach>
That works fine in a JSP. It works fine in a tag file invoked from a 
JSP. But if the tag file is invoked from another tag file, I get the 
error "According to TLD or attribute directive in tag file, attribute 
end does not accept any expressions." I can use the expression language 
in other places (e.g. outside of custom tags) though.

Is this a limitation of tag files or of Tomcat's implementation of them? 
Or am I just doing something wrong? If it's a limitation of the JSP spec 
and/or Tomcat, is there a work-around? Otherwise tag files are about to 
become a whole lot less useful to me... :-(

L.
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