Switch that takes an argument.
      Instance Methods
    
  
          
            3.2
          
          
            View on GitHub
            
          
        
        
          
            # File tmp/rubies/ruby-3.2.0/lib/optparse.rb, line 733
def parse(arg, argv)
  unless arg
    raise MissingArgument if argv.empty?
    arg = argv.shift
  end
  conv_arg(*parse_arg(arg, &method(:raise)))
end
          
        
      Raises an exception if argument is not present.