[antlr-interest] How to get the line no. of a token at lexer

[Nalin Chandrawansha]

Hi,
 
Is there any method of retrieving the line no. of a token at lexer? 
 
For example, if we want to catch the line numbers of comments,
 
LINE_COMMENT : label='//'  ~('\n'|'\r')* '\r'? '\n'  {System.out.println("Found a comment at line : "  +$label.line );}  {$channel=HIDDEN;}    ;
 
This doesn't work at lexer though we can use the .line at the paresr rules.
 
 
Thank you.
Nalin Chandrawansha

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