Terminates option parsing. Optional parameter arg is a string pushed back to be the first non-option argument.
Directs to accept specified class t. The argument string is passed to the block in which it should be converted to the desired class.
t
Argument class specifier, any object including Class.
pat
Pattern for argument, defaults to t if it responds to match.
accept(t, pat, &block)
Heading banner preceding summary.
Release code
Returns version string from program_name, version and release.
Subject of on_tail.
Puts option summary into to and returns to. Yields each line if a block is given.
to
Output destination, which must have method <<. Defaults to [].
width
Width of left side, defaults to @summary_width.
max
Maximum length allowed for left side, defaults to width - 1.
indent
Indentation, defaults to @summary_indent.
Creates an option from the given parameters params. See Parameters for New Options.
The block, if given, is the handler for the created option. When the option is encountered during command-line parsing, the block is called with the argument given for the option, if any. See Option Handlers.
Parses command line arguments argv in order. When a block is given, each non-option argument is yielded. When optional into keyword argument is provided, the parsed option values are stored there via []= method (so it can be Hash, or OpenStruct, or other similar object).
Returns the rest of argv left unparsed.
Same as order, but removes switches destructively. Non-option arguments remain in argv.
Parses command line arguments argv in permutation mode and returns list of non-option arguments. When optional into keyword argument is provided, the parsed option values are stored there via []= method (so it can be Hash, or OpenStruct, or other similar object).
Same as permute, but removes switches destructively. Non-option arguments remain in argv.
Parses environment variable env or its uppercase with splitting like a shell.
env defaults to the basename of the program.
Returns additional info.
Initializes a new instance and evaluates the optional block in context of the instance. Arguments args are passed to new, see there for description of parameters.
This method is deprecated, its behavior corresponds to the older new method.
Returns an incremented value of default according to arg.