head to the tip of the insect's abdomen. The goo is made up of various irritating chemicals and strong adhesives that permanently bind the body of the dead Camponotus to the attacker. This enemy ant becomes subdued by the noxious chemicals, as well as the fact that it's, well, forever glued to a corpse. After locking an enemy in a death grip, these ants bend and compress their abdomens so forcefully that the liquid violently ruptures out of several points on their rear-end. They aim for enemy's faces, maximizing the power of the irritants and ensuring an immobilizing "attachment." In your face! Although it may sound a little extreme, this kamikaze tactic serves to protect the ant's nest and territory. Self-sacrifice is not uncommon in highly social animals, : cast_expression
    | multiplicative_expression '*' cast_expression
    | multiplicative_expression '/' cast_expression
    | multiplicative_expression '%' cast_expression
    ;

additive_expression
    : multiplicative_expression
    | additive_expression '+' multiplicative_expression
    | additive_expression '-' multiplicative_expression
    ;

shift_expression
    : additive_expression
    | shift_expression LEFT_OP additive_expression
    | shift_expression RIGHT_OP additive_expression
    ;

relational_expression
    : shift_expression
    | relational_expression '<' shift_expression
    | relational_expression '>' shift_expression
    | relational_expression LE_OP shift_expression
    | relational_expression GE_OP shift_expression
    ;

equality_expression
    : relational_expression
    | equality_expression EQ_OP relational_expression
    | equality_expression