determining syntactically valid templates

Hello.  Is there a function available, or can anyone think of a good trick to 
determine if a template is syntactically valid, without having to render it?

I'd like to provide my clients a means to do simple template edits.  But before 
saving the template, I'd like to be able to pass the template as a string to 
some function (or pass the filename/path to a function) and have the function 
return TRUE if the template is syntactically valid, FALSE otherwise.

cheers,

Travis

-- 
Travis Low
<mailto:[email protected]>
<http://www.dawnstar.com>