OP_DUP_PLUS
token->type = OP_DUP_PLUS;
token->type = OP_DUP_PLUS;
case OP_DUP_PLUS:
while (token->type == OP_DUP_ASTERISK || token->type == OP_DUP_PLUS
start = (token->type == OP_DUP_PLUS) ? 1 : 0;