[Templates] Can TT throw an error if a key doesn't exist in stash?

[Hugh Hunter]

Hello all,

I am using TT to process templates of some XML configuration files.  I'm 
curious as to whether you can override the standard TT behavior of 
substituting an empty string for a key that isn't in stash.

eg.

"This is some [% foo %] text."

becomes

"This is some  text." if foo is not a key in the stash.

While this behavior is acceptable (even desirable) for processing an 
HTML template or something of the kind, I'd rather have the call to 
Template::process fail if the input file contains a reference to a key 
that doesn't exist in the stash.

Short of wrapping some sort of EXISTS functionality around each variable 
in my template, I'm at a loss.

Any ideas / thoughts are much appreciated.

--Hugh

--
Hugh Hunter
Software Engineer
Experian CheetahMail