[antlr-interest] useing antlr to get key information from comment line

[李家智]

i am new to antlr. i put key infomation in the comment and try to use antlr to retrive comment in text file.

here is the grammar:


grammar T;
options {backtrack=true;}
all     :       (txt)*;
txt     :comment {System.out.println("found comment");}
        |content {System.out.println("found content");}
        ;
comment
        :       COMMENT_TAG content
        ;
content
        :       STRING NEWLINE
        ;

      
COMMENT_TAG
        :        '#'
       
        ;
      
NEWLINE: ('\r'? '\n')+;

STRING
        :       ('\u0010'..'\uffff')*
        ;





the input text like this :


#command parameter parameter
hello,this is text;

it dose not work,the output is


found content
found content


my expectation is follow :


found comment
found content
.

how to modify the grammar?
Regards
Joel li