> On 16 Jan 2015, at 15:21, Richard Stallman <rms@gnu.org> wrote:
> 
> What I am pretty sure of is that if the plug-in generates the AST as
> text, a GPL-covered program could write it into a file, and some
> separate proprietary program could read the file, and this would not
> be considered combining the two programs.  It would be lawful, and
> could be quite harmful.

Isn’t this what dragonegg does (or did before it was abandoned for lack of interest)? 

	http://dragonegg.llvm.org <http://dragonegg.llvm.org/>

~Chad