Feature suggestions.
Well, according to https://github.com/antlr/antlr4/blob/master/doc/targets.md , C++...
antlr v4 mode
python language support
Is supported now, but requires an upcoming Emacs (post 24.5).
Initalization via custom interface for Debian
Infinite looping in template-unique-file function
Thanks for the report. Fixed in v3.3.