[antlr-interest] Dropping keywords in lexer

[Sean Walton]

I am trying to drop the keyword '__extension__' found in gcc.  This is 
essentially a "do-nothing" keyword and it is getting in the way of some 
of my parsing.  Is there a way to create a Lexer rule that will absorb 
the token and toss it?  I tried:

    TOSSERS
        : '__extension__' {channel=99;}
        ;

But, I get an "unreachable definition" error.
Ideas?
-Sean Walton
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