Is it possible to support files with HTML and multiple open/close tags?

In investigating #1405914: Make code link/reference creation more orderly and rational I came across this in the PGPReader class documentation:

"Also, template files with inline HTML and multiple php open and close tags are not supported."

I'm wondering if it would be possible to support these types of files in Grammar Parser?

The reason is that in the API module, we're using Grammar parser to find function/class/etc. declarations, and then we're using our own token_get_all() call to pretty-format the code and do reference/link tracking (e.g., "this function calls that function"). It seems like it would be good to use Grammar Parser to format the code and do reference/link tracking, but if it won't support .tpl.php files, which we need to support, then we have to keep doing our own token_get_code().

Any thoughts on whether this is possible in Grammar Parser? I'm guessing not, but I thought I would at least ask.