OptionParserOption-class {optparse}

Class to hold information about command-line options

Description

Class to hold information about command-line options

Slots

short_flag

String of the desired short flag comprised of the “-” followed by a letter.

long_flag

String of the desired long flag comprised of “–” followed by a letter and then a sequence of alphanumeric characters.

action

A character string that describes the action optparse should take when it encounters an option, either “store”, “store_true”, or “store_false”. The default is “store” which signifies that optparse should store the specified following value if the option is found on the command string. “store_true” stores TRUE if the option is found and “store_false” stores FALSE if the option is found.

type

A character string that describes specifies which data type should be stored, either “logical”, “integer”, “double”, “complex”, or “character”. Default is “logical” if action %in% c("store_true", store_false), typeof(default) if action == "store" and default is not NULL and “character” if action == "store" and default is NULL. “numeric” will be converted to “double”.

dest

A character string that specifies what field in the list returned by parse_args should optparse store option values. Default is derived from the long flag in opt_str.

default

The default value optparse should use if it does not find the option on the command line.

help

A character string describing the option to be used by print_help in generating a usage message. %default will be substituted by the value of default.

metavar

A character string that stands in for the option argument when printing help text. Default is the value of dest.

callback

A function that executes after the each option value is fully parsed

callback_args

Additional arguments that pass to the callback function.

See Also

make_option