Why no c:while tag in JSTL? Alternatives?

Question

Hi there.
I am a bit surprised there is no <c:while> tag in the JSTL. For example while outputting a list I want to be able to do this:
<c:while test="${currLevel < level--}"></ul></c:while>
But of course I can't.
Can anyone tell me:
1. How to do this in JSTL
2. Why the JSTL designers in their infinite wisdom didn't implement a <c:while> tag

Answer 1

Problem already solved, but I think that answer to question number 2, why while tag is not implemented, may be because you cannot deliver expressions to tag handlers as parameters. Parameters are always solved before they are delivered to handlers.
For example, if you put some boolean expression to JSP tag parameter,
<c:while test="${ a!=b }">
expression "a!=b" is solved once and the value is sent to handler, so it will be infinity loop or nothing at all.
How while loop may be implemented in JSP would be(for example) something like this.
<do>
<while test="${ a!=b }"/> <%-- no end tag --%>
<content>
do something...
</content>
</do>
While-tag gets value from boolean expression and sets that value to parent do-tag, content-tag asks from parent do-tag is it allowed to evaluate it's content.
Now expression "a!=b" gets evaluated in every iteration.
Quick thoughts,
and sorry for bad english.