Hi,

1rst: reconsider your design; your example causes a infinite depth
call tree and will end up in an OutOfMemoryException... Velocity
has some guards in recursive parses (property: directive.parse.maxdepth = 10),
but it does not look like it guards against deep macro calls.

2nd: You could resolve your question at runtime with the RenderTool,
where the first macro indirectly calls the second one.

Cheers,
Christoph

Brad Eisan wrote:
Hello,

I'm fairly new to Velocity and I've come across an interesting problem I haven't encountered before. I have read through the archives but cannot seem to find a solution to this. Though I may be missing something really obvious :)

This is a (silly) example of two macros which call one another (they exist together in a global macros file):

Macro 1:
#macro( title $product )
 You can get $product.name for #cost( $product ) now!
#end

Macro 2:
#macro( cost $product )
 <a href="/path/" title="#title( $product )">$product.amount USD</a>
#end

This outputs the error:
ERROR: VM #cost: error : too few arguments to macro. Wanted 1 got 0

My question is that if macros must be declared before they are used, how can you solve this since one macro will always have to be declared behind the other? If I reverse the order of the two in the file, the error is the same, but is for the other macro.

Thanks in advance,
Brad


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