grammar LineCounter;

@members {
    public int cnt=0;
    public static void main(String[] args) throws Exception {
        LineCounterLexer lex = new LineCounterLexer(new ANTLRFileStream(args[0]));
       	CommonTokenStream tokens = new CommonTokenStream(lex);

        LineCounterParser parser = new LineCounterParser(tokens);
        try {
            parser.s();
        } catch (RecognitionException e)  {
            e.printStackTrace();
        }
    }
}

/*------------------------------------------------------------------
 * LEXER RULES
 *------------------------------------------------------------------*/

NONLCHARS		: (NONLCHAR)* ;
fragment NONLCHAR	: ~('\n') ;
NL			: '\n' '\r'? ;


/*------------------------------------------------------------------
 * PARSER RULES
 *------------------------------------------------------------------*/

s	: (line) + {System.out.println(cnt);};

line	: NONLCHARS NL {cnt++;};