[antlr-interest] Error in number recognition

[Pierre Attar]

Hi,

I hav a problem with number recognition. I use the following reduced 
grammar for recognizing sentences such as tensor[1,char[x],char[y]].

My problem ? When the DiacriticalNumber  is commented, everything goes 
well ; when it is active, antlr complains (even if it is not formally 
used in this reduced debugging grammar).

It seems that I have a problem with the rule but I do not understand 
which one.

grammar mff;
m : e=expression ;
expression :  (r=atomOp  | r=tensorOp ) ;
atomOp  :    (r=charact);
charact : 'char[' String  ']';
tensorOp      : 'tensor[' Number    ',' expression     (',' expression 
)+ ']'    ;

//DiacriticalNumber     : ('0'..'9')+  ','  ('0'..'9')+  ','  
('0'..'9')+  ','  ('0'..'9')+  ','  ('0'..'9')+;

StringNumber
    : ('\n0022'|'"') Number ('\n0022'|'"'); 
Number : ('0'..'9')+;
Decimal : ('0'..'9')+ '.' ('0'..'9')+;
String :     Letter+;
CompleteString :     (Letter | '0'..'9')+;
fragment Letter :     'a'..'z'|'A'..'Z';


Thanks a lot for help, Pierre