[antlr-interest] adding "version" option to ANTLR grammars

[Johannes Luber]

> > That is an interesting idea. I am cc'ing the  interest list. sorry for  
> > the long delay.
> > 
> > I take it that you are suggesting the following
> > 
> > grammar T;
> > options {
> > 	language = ...;
> > 	version = "3.1.1";
> > }
> 
> I do.
> 
> Johannes

I just thought about an improvement: ANTLR should warn the user, if the version isn't identical to the one of the tool. That way people not only see a potential issue, but are more inclined to update the string.

Johannes
> > 
> > Ter
> > On Nov 29, 2008, at 1:42 PM, Johannes Luber wrote:
> > 
> > > Hi!
> > >
> > > Thinking about the upcoming dialects of ANTLR grammars (one for each
> > > version, which aren't totally upwardscompatible), I had this idea.  
> > > Would
> > > it make sense to make an option named "version" mandatory, which  
> > > simply
> > > records the used ANTLR version for writing. It's mandatory because
> > > people don't seem ever to write a comment explaining the requirements
> > > (myself included ;). It makes easier for people to diagnose problems
> > > with a third-party grammar.
> > >
> > > Johannes
> 
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