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Individual switch class. Not important to the user.

Defined within Switch are several Switch-derived classes: NoArgument, RequiredArgument, etc.

Namespace
Methods
G
I
N
P
S

Attributes

[R] arg
[R] block
[R] conv
[R] desc
[R] long
[R] pattern
[R] short

Class Public methods

guess(arg)

Guesses argument style from arg. Returns corresponding OptionParser::Switch class (OptionalArgument, etc.).

Source: show | on GitHub 

# File ruby/lib/optparse.rb, line 519
def self.guess(arg)
  case arg
  when ""
    t = self
  when /\A=?\[/
    t = Switch::OptionalArgument
  when /\A\s+\[/
    t = Switch::PlacedArgument
  else
    t = Switch::RequiredArgument
  end
  self >= t or incompatible_argument_styles(arg, t)
  t
end

incompatible_argument_styles(arg, t)

Source: show | on GitHub 

# File ruby/lib/optparse.rb, line 534
def self.incompatible_argument_styles(arg, t)
  raise(ArgumentError, "#{arg}: incompatible argument styles\n  #{self}, #{t}",
        ParseError.filter_backtrace(caller(2)))
end

new(pattern = nil, conv = nil, short = nil, long = nil, arg = nil, desc = ([] if short or long), block = nil, &_block)

Source: show | on GitHub 

# File ruby/lib/optparse.rb, line 543
def initialize(pattern = nil, conv = nil,
               short = nil, long = nil, arg = nil,
               desc = ([] if short or long), block = nil, &_block)
  raise if Array === pattern
  block ||= _block
  @pattern, @conv, @short, @long, @arg, @desc, @block =
    pattern, conv, short, long, arg, desc, block
end

pattern()

Source: show | on GitHub 

# File ruby/lib/optparse.rb, line 539
def self.pattern
  NilClass
end

Instance Public methods

summarize(sdone = {}, ldone = {}, width = 1, max = width - 1, indent = "")

Produces the summary text. Each line of the summary is yielded to the block (without newline).

sdone

Already summarized short style options keyed hash.

ldone

Already summarized long style options keyed hash.

width

Width of left side (option part). In other words, the right side (description part) starts after width columns.

max

Maximum width of left side -> the options are filled within max columns.

indent

Prefix string indents all summarized lines.

Source: show | on GitHub 

# File ruby/lib/optparse.rb, line 603
def summarize(sdone = {}, ldone = {}, width = 1, max = width - 1, indent = "")
  sopts, lopts = [], [], nil
  @short.each {|s| sdone.fetch(s) {sopts << s}; sdone[s] = true} if @short
  @long.each {|s| ldone.fetch(s) {lopts << s}; ldone[s] = true} if @long
  return if sopts.empty? and lopts.empty? # completely hidden

  left = [sopts.join(', ')]
  right = desc.dup

  while s = lopts.shift
    l = left[-1].length + s.length
    l += arg.length if left.size == 1 && arg
    l < max or sopts.empty? or left << +''
    left[-1] << (left[-1].empty? ? ' ' * 4 : ', ') << s
  end

  if arg
    left[0] << (left[1] ? arg.sub(/\A(\[?)=/, '\1') + ',' : arg)
  end
  mlen = left.collect {|ss| ss.length}.max.to_i
  while mlen > width and l = left.shift
    mlen = left.collect {|ss| ss.length}.max.to_i if l.length == mlen
    if l.length < width and (r = right[0]) and !r.empty?
      l = l.to_s.ljust(width) + ' ' + r
      right.shift
    end
    yield(indent + l)
  end

  while begin l = left.shift; r = right.shift; l or r end
    l = l.to_s.ljust(width) + ' ' + r if r and !r.empty?
    yield(indent + l)
  end

  self
end

switch_name()

Main name of the switch.

Source: show | on GitHub 

# File ruby/lib/optparse.rb, line 655
def switch_name
  (long.first || short.first).sub(/\A-+(?:\[no-\])?/, '')
end