[Webmacro-devel] Revised #macro stack overflow test code

[Marc P. <ma...@an...>]

Here, I've tightened up the example a bit, and made it so #visitChildren 
does not call itself directly - to deflect accusations regarding the 
inability of a #macro to build itself given that it calls itself and hence 
cannot hope to complete. Still it doesn't work, but I suspect still for 
this reason, due to the way macros are built internally.

We definitely need this fixed IMO. At the very least recursion, if it 
cannot be supported, should be trapped and an exception thrown before your 
servlet log becomes 500KB in one second!

However, I can't believe that we can't support macro recursion. Without it, 
any kind of DOM/XML based processing in WM templates is pretty much 
impossible / extremely ugly (using recursive #includes).

## ********************************************************
## This is all just to set up a trivial tree structure
## ********************************************************
 
#bean $rootNode = "java.util.Hashtable"
#set $rootNode.Text="root"
 
#bean $wmdocNode = "java.util.Hashtable"
#set $wmdocNode.Text="wmdoc"
 
#bean $titleNode1 = "java.util.Hashtable"
#set $titleNode1.Text="title1"
 
#bean $paraNode1 = "java.util.Hashtable"
#set $paraNode1.Text="para1"
 
#bean $titleNode2 = "java.util.Hashtable"
#set $titleNode2.Text="title2"
#bean $paraNode2 = "java.util.Hashtable"
#set $paraNode2.Text="para2"
 
#bean $paraNode3 = "java.util.Hashtable"
#set $paraNode3.Text="para3"
 
#set $rootNode.Children = [ $wmdocNode]
#set $paraNode1.Children = [$titleNode2, $paraNode2]
#set $wmdocNode.Children = [$titleNode1, $paraNode1, $paraNode3]
 
## ********************************************************
## Here is the code
## ********************************************************
 
#macro visitChildren( $node)

  #if ($node.Children) 
       #foreach $n in $node.Children
          $n.Text<br>
          #doIt( $n)
       #end
  #end
 
#end
 
## Added this so visitChildren does not -directly-call itself

#macro doIt( $node)
  #visitChildren($node)
#end

## ********************************************************
## Call the code
## ********************************************************
 
#visitChildren( $rootNode)


-- 
Marc Palmer (Wangjammer5)
http://www.wangjammers.org
Java Consultants