I have used CTAGS before with actionscript 3 using a regex parser. I found it to be pretty problematic and fail often. Does anyone know of any better solutions out there? I found a parser  for actionscript 3 that is written in java http://opensource.adobe.com/svn//opensource/flexpmd/trunk I was also thinking there could be a c based compiler in this project http://www.swftools.org/download.html I will ask that email thread as well.