class OptionParser::List

Simple option list providing mapping from short and/or long option string to OptionParser::Switch and mapping from acceptable argument to matching pattern and converter pair. Also provides summary feature.

Attributes

atype[R]

Map from acceptable argument types to pattern and converter pairs.

list[R]

List of all switches and summary string.

long[R]

Map from long style option switches to actual switch objects.

short[R]

Map from short style option switches to actual switch objects.

Public Class Methods

new() click to toggle source

Just initializes all instance variables.

# File lib/optparse.rb, line 597
def initialize
  @atype = {}
  @short = OptionMap.new
  @long = OptionMap.new
  @list = []
end

Public Instance Methods

accept(t, pat = /.*/m, &block) click to toggle source

See OptionParser#accept.

# File lib/optparse.rb, line 607
def accept(t, pat = /.*/m, &block)
  if pat
    pat.respond_to?(:match) or
      raise TypeError, "has no `match'", ParseError.filter_backtrace(caller(2))
  else
    pat = t if t.respond_to?(:match)
  end
  unless block
    block = pat.method(:convert).to_proc if pat.respond_to?(:convert)
  end
  @atype[t] = [pat, block]
end

append(*args) click to toggle source

Appends switch at the tail of the list, and associates short, long and negated long options. Arguments are:

switch: OptionParser::Switch instance to be inserted.
short_opts: List of short style options.
long_opts: List of long style options.
nolong_opts: List of long style options with “no-” prefix.

append(switch, short_opts, long_opts, nolong_opts)

# File lib/optparse.rb, line 671
def append(*args)
  update(*args)
  @list.push(args[0])
end

complete(id, opt, icase = false, *pat, &block) click to toggle source

Searches list id for opt and the optional patterns for completion pat. If icase is true, the search is case insensitive. The result is returned or yielded if a block is given. If it isn't found, nil is returned.

# File lib/optparse.rb, line 693
def complete(id, opt, icase = false, *pat, &block)
  __send__(id).complete(opt, icase, *pat, &block)
end

each_option(&block) click to toggle source

Iterates over each option, passing the option to the block.

# File lib/optparse.rb, line 700
def each_option(&block)
  list.each(&block)
end

prepend(*args) click to toggle source

Inserts switch at the head of the list, and associates short, long and negated long options. Arguments are:

switch: OptionParser::Switch instance to be inserted.
short_opts: List of short style options.
long_opts: List of long style options.
nolong_opts: List of long style options with “no-” prefix.

prepend(switch, short_opts, long_opts, nolong_opts)

# File lib/optparse.rb, line 655
def prepend(*args)
  update(*args)
  @list.unshift(args[0])
end

reject(t) click to toggle source

See OptionParser#reject.

# File lib/optparse.rb, line 623
def reject(t)
  @atype.delete(t)
end

search(id, key) { |val| ... } click to toggle source

Searches key in id list. The result is returned or yielded if a block is given. If it isn't found, nil is returned.

# File lib/optparse.rb, line 680
def search(id, key)
  if list = __send__(id)
    val = list.fetch(key) {return nil}
    block_given? ? yield(val) : val
  end
end

summarize(*args, &block) click to toggle source

Creates the summary table, passing each line to the block (without newline). The arguments args are passed along to the summarize method which is called on every option.

# File lib/optparse.rb, line 709
def summarize(*args, &block)
  sum = []
  list.reverse_each do |opt|
    if opt.respond_to?(:summarize) # perhaps OptionParser::Switch
      s = []
      opt.summarize(*args) {|l| s << l}
      sum.concat(s.reverse)
    elsif !opt or opt.empty?
      sum << ""
    elsif opt.respond_to?(:each_line)
      sum.concat([*opt.each_line].reverse)
    else
      sum.concat([*opt.each].reverse)
    end
  end
  sum.reverse_each(&block)
end

Private Instance Methods

update(sw, sopts, lopts, nsw = nil, nlopts = nil) click to toggle source

Adds sw according to sopts, lopts and nlopts.

sw: OptionParser::Switch instance to be added.
sopts: Short style option list.
lopts: Long style option list.
nlopts: Negated long style options list.

# File lib/optparse.rb, line 635
def update(sw, sopts, lopts, nsw = nil, nlopts = nil)
  sopts.each {|o| @short[o] = sw} if sopts
  lopts.each {|o| @long[o] = sw} if lopts
  nlopts.each {|o| @long[o] = nsw} if nsw and nlopts
  used = @short.invert.update(@long.invert)
  @list.delete_if {|o| Switch === o and !used[o]}
end