[antlr-interest] Match A with exception of B .....how do I do that?

[Vlastimil Adamovsky]

My weekend was a sleepless one. I have a problem and I hope ANTLR experts will help me....
 
Assume, I have defined lexer rules:
 
A  :   '0' .. '9' ;
 
B  :   '4' .. '7';
 
I want to parse digits, that are from 0 to 9  except those that are from 4 to 7.
In reality, I want to parse only digits  0,1,2,3,8,9 ....
 
How do I set up a correct rule? 
 
Please HELP!
 
Thanks,
  Vlastimil 
 http://ironglue.wordpress.com
 
 


      
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