grammar adder;

/* 
 * Sample ANTLR file that illustrates computing results in a simple case.
 */

commands
   : addCommand+ EOF
   ;

addCommand
   : ADD number_list
                {print("Total: " + str($number_list.list_value))}
   ;

number_list returns [int list_value]
   : number
                {$list_value = $number.value}
   | number COMMA number_list
                {$list_value = $number.value + $number_list.list_value}
   ;

number returns [int value]
   : NUMBER
                {$value = int($NUMBER.text)}
   ;

ADD
   : ('a'|'A')('d'|'D')('d'|'D')
   ;

COMMA
   : ','
   ;

NUMBER
   : '-'? ('0'..'9')+
   ;

WS
   : [ \r\n\t]+ -> channel (HIDDEN)
   ;