[cfe-dev] specifying warning groups with TableGen

[Mike Stump]

On Mar 17, 2009, at 10:42 PM, Ted Kremenek wrote:
> def error_name : Error<"error string", [ list of groups ]>

One problem with this is that for people that add and maintain custom  
groups in private branches that pick and choose existing warnings,  
this format makes it harder to resolve merges.

If the format allows one to add <error_name addition_groups>, that  
takes care of this problem.