[antlr-interest] Conversion V2 to V3

[David Wigg]

In "Migrating from Antlr 2 to Antlr 3" it says under "Changing the type of
tokens in the lexer" that we need to change,

{$setType(TOKEN);} to {$type = TOKEN;}

 In V2 I was able to set a token name using e.g. "{_ttype =
HEXADECIMALINT;}"

but when I replace this with {$type = HEXADECIMALINT;) it doesn't work and I
get warning (105)

"No lexer rule corresponding to token: HEXADECIMALINT".

Relevant code shown below,

Please could someone let me know where I am going wrong or point out where I
can find the answer.

I searched (literally) the antlr site but couldn't find anything else.

tokens
 {
 OPERATOR = 'operator';
 OCTALINT;
 DECIMALINT;
 HEXADECIMALINT;
 FLOATONE;
 FLOATTWO;
 }

literal
 : OCTALINT
 | DECIMALINT
 | HEXADECIMALINT
 | CharLiteral
 | WCharLiteral
 | (StringLiteral|WStringLiteral)+
 | FLOATONE
 | FLOATTWO
 | 'true'
 | 'false'
 ;

 Number
 :
  ( (Digit)+ ('.' | 'e' | 'E') )=>
  (Digit)+
  ( '.' (Digit)* (Exponent)? {_ttype = FLOATONE;} //Zuo 3/12/01
  | Exponent                 {_ttype = FLOATTWO;} //Zuo 3/12/01
  )                          //{_ttype = DoubleDoubleConst;}
  (FloatSuffix               //{_ttype = FloatDoubleConst;}
  |LongSuffix                //{_ttype = LongDoubleConst;}
  )?
 |
  ('...')=> '...'            {_ttype = ELLIPSIS;}
 |
  '.'                        {_ttype = DOT;}
  ( (Digit)+ (Exponent)?   {_ttype = FLOATONE;} //Zuo 3/12/01
                                   //{_ttype = DoubleDoubleConst;}
   (FloatSuffix           //{_ttype = FloatDoubleConst;}
   |LongSuffix            //{_ttype = LongDoubleConst;}
   )?
  )?
 |
  '0' ('0'..'7')*            //{_ttype = IntOctalConst;}
  (LongSuffix                //{_ttype = LongOctalConst;}
  |UnsignedSuffix            //{_ttype = UnsignedOctalConst;}
  )*                         {_ttype = OCTALINT;}
 |
  '1'..'9' (Digit)*          //{_ttype = IntIntConst;}
  (LongSuffix                //{_ttype = LongIntConst;}
  |UnsignedSuffix            //{_ttype = UnsignedIntConst;}
  )*                         {_ttype = DECIMALINT;}
 |
  '0' ('x' | 'X') (HexadecimalDigit)+ //('a'..'f' | 'A'..'F' | Digit)+
                                   //{_ttype = IntHexConst;}
  (LongSuffix                //{_ttype = LongHexConst;}
  |UnsignedSuffix            //{_ttype = UnsignedHexConst;}
//  )*                         {_ttype = HEXADECIMALINT;}   JDW_080320
  )*       {$type = HEXADECIMALINT;}
 ;
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