[antlr-interest] Parser rule to negate next token

[bguillot_hit]

Is it possible to generate a rule (Parser) that negate the following
Token ?

The Problem is all the rules I tried cannot resolve the ambiguity
between the rules. If I could use a rule like 

mynegatingrule:
bp:BYPASS_START e:STRING_LITERAL l:STRING_LITERAL ~(c:STRING_LITERAL)

to allow a rule without the next token to be of a certain type. 
This would remove the ambiguity, right ?

Any one of you ANTLR Gurus have any clues on this one ?

Thanks in advance.

Bernard.


Detail:
I want to detect and take different action when Parsing theses Lines.

//@ "ONE" "TWO" "THREE"
//@ "ONE" "TWO"
//@ "ONE"
//@

//@ is declared set in the lexer as BYPASS_START
the Strings are STRING_LITERAL (taken from java.g)

the first option (start with bp) if on it's own works perfectly to
detect line //@ "ONE" "TWO" "THREE" but crash for the others.

bypassDefinition!
: bp:BYPASS_START e:STRING_LITERAL l:STRING_LITERAL c:STRING_LITERAL
  {
    #bypassDefinition = #([BYPASS, "BYPASS"], 
                            #([BYPASS_ERROR,"ERROR"], #e), 
                            #([BYPASS_LOCATION,"LOCATION"], #l), 
                            #([BYPASS_COMMENT, "COMMENT"], #c));
  }

| bp2:BYPASS_START e2:STRING_LITERAL l2:STRING_LITERAL
  {
    #bypassDefinition = #([BYPASS, "BYPASS"], 
                            #([BYPASS_ERROR,"ERROR"], #e2), 
                            #([BYPASS_LOCATION,"LOCATION"], #l2));
  }

| bp3:BYPASS_START e3:STRING_LITERAL
  {
    #bypassDefinition = #([BYPASS, "BYPASS"], 
                            #([BYPASS_ERROR,"ERROR"], err3));
  }

| bp4:BYPASS_START
  {
    #bypassDefinition = #([BYPASS, "BYPASS"], 
                             #([BYPASS_ERROR,"ERROR"], "No Detail"));
    System.out.println("  Parser Bypass: NO ERRORCODE");
  }
;



 

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