Searches key in @stack for id hash and returns or yields the result.
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.
Add option switch and handler. See make_switch for an explanation of parameters.
Parses command line arguments argv in order. When a block is given, each non-option argument is yielded.
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.
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.
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.