[antlr-interest] Newby Lexer Question

[John B. Brodie]

Greetings!

On Fri, 2010-12-03 at 07:05 -0800, Daniel Rippel wrote:
> 
> I am fairly new to antlr and am running into a basic issue that I can't quite 
> find the answer for on the wiki and in Parr's book.
> 
> Here is my lexer.  Greatly simplified of course.
> 
> ...
> CREATE : 'create' ;
> ...
> IDENTIFIER : (['a'..'z']|['A'..'Z'])(['a'..'z']|['A'..'Z']|['0'..'9'])+ ;
> 
did you really mean to use the [ and ] above? those aren't valid syntax
here. [] are used to surround parameters being passed to a rule. use ()
instead...

> Basically, I want 'create' to be a keyword token.
> And something like 'createFoo' should be an identifier.
> 
> However, the lexer always finds 'create' stops and gives me the CREATE token 
> back.
> 
> I have tried using the greedy flag but am not having any luck.
> 
> Any ideas or suggestions would be extremely helpful.  
> I'll even accept an RTFM, if you can point me to the page in the FM.
> 

once you replace the [] with () i see no problem with this fragment.

maybe try to create the smallest (yet complete) grammar that exhibits
your problem. and post that.

sorry for not being very helpful....
   -jbb