[antlr-interest] Grammar problem

[vincent]

 Hy,

I use some ANTLR grammar to decode text files. But i encouter a problem
with the following example.
Does anybody can help me ?

My text files is componed of the following parts :

start line : "-  "
optional text : text ended with "."
serial number : 5 digits ended by a space
versioning : digit / digit
text : text

example with optional text :

-  optional text.00001 001/001TEXT

example without optional text :

-  00001 001/001TEXT

my probem is for optional text, cant detect it with antlr grammar.
I use the following code :




COMMA : ',';
DOT : '.';
HYPHEN :'-';
SPACE : ' ';
SLASH : '/';
CHAR : ('a'..'z'|'A'..'Z');
SEPARATOR : (DOT |HYPHEN)+;
DIGIT : ('0'..'9');
TXTALPHA : (CHAR)+ ;
NUMBER : (DIGIT)+ ;
TXTALPHANUM : ((CHAR) | (DIGIT))+;


textline : HYPHEN (SPACE)+  (optionalLines)* normalLine;

optionalLines : (TXTALPHA)* DOT

normalLine: serialNumber SPACE currentPartNumber SLASH maxPartNumber;

thanks

VIncent