Option objects

Parsing a record populates its values field with elements and options. An option is an R6 object that inherit from nmrec_option.

Details

positional (nmrec_option_pos): the option is rendered as the value field.

For example, the file name from a $DATA record with a value of "foo.csv" would be rendered as "foo.csv".
flag (nmrec_option_flag): if value is not NULL, the option is rendered as the name_raw field.

For example, the interaction flag for an $ESTIMATION record with a name_raw value of "interact" and a value of TRUE would be rendered as "interact".
value (nmrec_option_value): render name-value pair from name_raw field and value field, separating the values by the sep field value.

For example, the maxevals option for a $ESTIMATION record with a name_raw field of "MAX", a value field of "999", and sep field of " = " would be rendered as "MAX = 999".
record name (nmrec_option_record_name): this option derives from nmrec_option_flag and tailors formatting for record names.

For example, a name_raw value of "est" for an $ESTIMATION record would be rendered as "$est".
nested (nmrec_option_nested): this option derives from nmrec_option_pos, replacing the simpler value field with a values field that is a list of items to render. Like the values field of a record objects, this consists of elements and options. It is useful for THETA, OMEGA, and SIGMA values, which can have more complex formatting and have attached options (such as "FIXED").