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class OptionParser::List

Parent:: Object

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() Show source

Just initializes all instance variables.

# File lib/optparse.rb, line 741
def initialize
  @atype = {}
  @short = OptionMap.new
  @long = OptionMap.new
  @list = []
end

Public Instance Methods

accept(t, pat = /.*/m, &block) Show source

See OptionParser#accept.

# File lib/optparse.rb, line 751
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) Show 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 815
def append(*args)
  update(*args)
  @list.push(args[0])
end

complete(id, opt, icase = false, *pat, &block) Show 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 837
def complete(id, opt, icase = false, *pat, &block)
  __send__(id).complete(opt, icase, *pat, &block)
end

each_option(&block) Show source

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

# File lib/optparse.rb, line 844
def each_option(&block)
  list.each(&block)
end

prepend(*args) Show 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 799
def prepend(*args)
  update(*args)
  @list.unshift(args[0])
end

reject(t) Show source

See OptionParser#reject.

# File lib/optparse.rb, line 767
def reject(t)
  @atype.delete(t)
end

search(id, key) { |val| ... } Show 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 824
def search(id, key)
  if list = __send__(id)
    val = list.fetch(key) {return nil}
    block_given? ? yield(val) : val
  end
end

summarize(*args, &block) Show 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 853
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) Show 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 779
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

Ruby Core © 1993–2017 Yukihiro Matsumoto
Licensed under the Ruby License.
Ruby Standard Library © contributors
Licensed under their own licenses.