ForEach interaction with deferred value expressions in JSTL1.2

Question

JSP2.1/JSF1.2 now provide more support for using the JSTL forEach tag with nested actions (deferred values) that refer to the iteration variable (see http://jcp.org/aboutJava/communityprocess/maintenance/jsr052/jstl-1_2-mr-changeLog_PFD.html).
However, this support is still quite limited. The current implementation (from glassfish or javaserverfaces projects on dev.java.net) only allow nested deferred-value expressions to refer to the "var" variable (not the "varStatus" variable), and only if the forEach "items" attribute itself refers to a deferred-value expression.
I see no reason why the following cases at least shouldn't also be supported:
(1) "items" attribute not present, just index values. eg:
<c:forEach var="it" begin="0" end="${fn:length(testlist) - 1}">
  <h:outputText value="#{it}." />
  <h:inputText value="#{testlist[it]}" size="20" />
</c:forEach>(2) varStatus available to deferred-value expressions:
<c:forEach items="#{testlist}" var="it" varStatus="is">
  <h:outputText value="#{is.index}." />
  <h:inputText value="#{it}" size="20" />
</c:forEach>Does this behaviour need to be mandated in the spec, or is it up to the implementations? The code that currently controls this behaviour is the "exposeVariables()" method of the class "javax.servlet.jsp.jstl.core.LoopTagSupport", which implies this is an issue for the spec.
Obviously you can write your own "forEach" tag that does support all this, but it would be nice if the JSTL had more complete support built-in.

Answer 1

As there seems to be no information about the problem in the Duke's Bank "formBasedLogin" tag, is there any other publicly available example of a custom JSF component that demonstrates how to implement the handling of deferred value attributes?
I would be most grateful for a minimal working example that demonstrates how to handle deferred value attributes in a JSF custom component.
Thanks
Stephan