Class: OptionParser::Switch::PlacedArgument

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, ::OptionParser::Switch
Instance Chain: self, ::OptionParser::Switch
Inherits:	OptionParser::Switch Object OptionParser::Switch OptionParser::Switch::PlacedArgument
Defined in:	lib/optparse.rb

Overview

::OptionParser::Switch that takes an argument, which does not begin with '-'.

Class Method Summary

::OptionParser::Switch - Inherited

.guess	Guesses argument style from #arg.
.incompatible_argument_styles, .new, .pattern

Instance Attribute Summary

::OptionParser::Switch - Inherited

#arg, #block, #conv, #desc, #long, #pattern, #short

Instance Method Summary

#parse(arg, argv, &error)

Returns nil if argument is not present or begins with '-'.

::OptionParser::Switch - Inherited

#summarize	Produces the summary text.
#switch_name	Main name of the switch.
#conv_arg	Parses argument, converts and returns #arg, #block and result of conversion.
#parse_arg	Parses #arg and returns rest of #arg and matched portion to the argument pattern.

Constructor Details

This class inherits a constructor from OptionParser::Switch

Instance Method Details

#parse(arg, argv, &error)

Returns nil if argument is not present or begins with '-'.

[ GitHub ]

# File 'lib/optparse.rb', line 560


def parse(arg, argv, &error)
  if !(val = arg) and (argv.empty? or /\A-/ =~ (val = argv[0]))
    return nil, block, nil
  end
  opt = (val = parse_arg(val, &error))[1]
  val = conv_arg(*val)
  if opt and !arg
    argv.shift
  else
    val[0] = nil
  end
  val
end