class Gem::OptionParser::Switch::OptionalArgument


Switch that can omit argument.

def parse(arg, argv, &error)


Parses argument if given, or uses default value.
def parse(arg, argv, &error)
  if arg
    conv_arg(*parse_arg(arg, &error))
  else
    omitted_argument conv_arg(arg)
  end
end

def pretty_head # :nodoc:

:nodoc: 
def pretty_head           # :nodoc:
  "Optional"
end