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ðŸ“„ abbrev.rb(3.31 KB)
ðŸ“„ base64.rb(2.63 KB)
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ðŸ“ date
ðŸ“„ date.rb(946 B)
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ðŸ“„ delegate.rb(9.78 KB)
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ðŸ“„ digest.rb(2.24 KB)
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ðŸ“„ dl.rb(280 B)
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ðŸ“„ forwardable.rb(7.56 KB)
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ðŸ“„ rational.rb(308 B)
ðŸ“ rbconfig
ðŸ“ rdoc
ðŸ“„ rdoc.rb(4.88 KB)
ðŸ“„ resolv-replace.rb(1.73 KB)
ðŸ“„ resolv.rb(61.45 KB)
ðŸ“ rexml
ðŸ“ rinda
ðŸ“ ripper
ðŸ“„ ripper.rb(2.53 KB)
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ðŸ“ rubygems
ðŸ“„ rubygems.rb(27.53 KB)
ðŸ“„ scanf.rb(23.52 KB)
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ðŸ“„ singleton.rb(4.02 KB)
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ðŸ“„ un.rb(8.34 KB)
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ðŸ“„ weakref.rb(3.23 KB)
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ðŸ“ x86_64-linux
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Editing: forwardable.rb

#
#   forwardable.rb -
#       $Release Version: 1.1$
#       $Revision: 38689 $
#       by Keiju ISHITSUKA(keiju@ishitsuka.com)
#       original definition by delegator.rb
#       Revised by Daniel J. Berger with suggestions from Florian Gross.
#
#       Documentation by James Edward Gray II and Gavin Sinclair

# The Forwardable module provides delegation of specified
# methods to a designated object, using the methods #def_delegator
# and #def_delegators.
#
# For example, say you have a class RecordCollection which
# contains an array <tt>@records</tt>.  You could provide the lookup method
# #record_number(), which simply calls #[] on the <tt>@records</tt>
# array, like this:
#
#   class RecordCollection
#     extend Forwardable
#     def_delegator :@records, :[], :record_number
#   end
#
# Further, if you wish to provide the methods #size, #<<, and #map,
# all of which delegate to @records, this is how you can do it:
#
#   class RecordCollection
#     # extend Forwardable, but we did that above
#     def_delegators :@records, :size, :<<, :map
#   end
#   f = Foo.new
#   f.printf ...
#   f.gets
#   f.content_at(1)
#
# If the object isn't a Module and Class, You can too extend Forwardable
# module.
#
#   printer = String.new
#   printer.extend Forwardable              # prepare object for delegation
#   printer.def_delegator "STDOUT", "puts"  # add delegation for STDOUT.puts()
#   printer.puts "Howdy!"
#
# == Another example
#
# We want to rely on what has come before obviously, but with delegation we can
# take just the methods we need and even rename them as appropriate.  In many
# cases this is preferable to inheritance, which gives us the entire old
# interface, even if much of it isn't needed.
#
#   class Queue
#     extend Forwardable
#
#     def initialize
#       @q = [ ]    # prepare delegate object
#     end
#
#     # setup preferred interface, enq() and deq()...
#     def_delegator :@q, :push, :enq
#     def_delegator :@q, :shift, :deq
#
#     # support some general Array methods that fit Queues well
#     def_delegators :@q, :clear, :first, :push, :shift, :size
#   end
#
#   q = Queue.new
#   q.enq 1, 2, 3, 4, 5
#   q.push 6
#
#   q.shift    # => 1
#   while q.size > 0
#     puts q.deq
#   end
#
#   q.enq "Ruby", "Perl", "Python"
#   puts q.first
#   q.clear
#   puts q.first
#
# This should output:
#
#   2
#   3
#   4
#   5
#   6
#   Ruby
#   nil
#
# == Notes
#
# Be advised, RDoc will not detect delegated methods.
#
# +forwardable.rb+ provides single-method delegation via the def_delegator and
# def_delegators methods. For full-class delegation via DelegateClass, see
# +delegate.rb+.
#
module Forwardable
  # Version of +forwardable.rb+
  FORWARDABLE_VERSION = "1.1.0"

@debug = nil
  class << self
    # If true, <tt>__FILE__</tt> will remain in the backtrace in the event an
    # Exception is raised.
    attr_accessor :debug
  end

# Takes a hash as its argument.  The key is a symbol or an array of
  # symbols.  These symbols correspond to method names.  The value is
  # the accessor to which the methods will be delegated.
  #
  # :call-seq:
  #    delegate method => accessor
  #    delegate [method, method, ...] => accessor
  #
  def instance_delegate(hash)
    hash.each{ |methods, accessor|
      methods = [methods] unless methods.respond_to?(:each)
      methods.each{ |method|
        def_instance_delegator(accessor, method)
      }
    }
  end

#
  # Shortcut for defining multiple delegator methods, but with no
  # provision for using a different name.  The following two code
  # samples have the same effect:
  #
  #   def_delegators :@records, :size, :<<, :map
  #
  #   def_delegator :@records, :size
  #   def_delegator :@records, :<<
  #   def_delegator :@records, :map
  #
  def def_instance_delegators(accessor, *methods)
    methods.delete("__send__")
    methods.delete("__id__")
    for method in methods
      def_instance_delegator(accessor, method)
    end
  end

# Define +method+ as delegator instance method with an optional
  # alias name +ali+. Method calls to +ali+ will be delegated to
  # +accessor.method+.
  #
  #   class MyQueue
  #     extend Forwardable
  #     attr_reader :queue
  #     def initialize
  #       @queue = []
  #     end
  #
  #     def_delegator :@queue, :push, :mypush
  #   end
  #
  #   q = MyQueue.new
  #   q.mypush 42
  #   q.queue    #=> [42]
  #   q.push 23  #=> NoMethodError
  #
  def def_instance_delegator(accessor, method, ali = method)
    line_no = __LINE__; str = %{
      def #{ali}(*args, &block)
        begin
          #{accessor}.__send__(:#{method}, *args, &block)
        rescue Exception
          $@.delete_if{|s| %r"#{Regexp.quote(__FILE__)}"o =~ s} unless Forwardable::debug
          ::Kernel::raise
        end
      end
    }
    # If it's not a class or module, it's an instance
    begin
      module_eval(str, __FILE__, line_no)
    rescue
      instance_eval(str, __FILE__, line_no)
    end

end

alias delegate instance_delegate
  alias def_delegators def_instance_delegators
  alias def_delegator def_instance_delegator
end

# SingleForwardable can be used to setup delegation at the object level as well.
#
#    printer = String.new
#    printer.extend SingleForwardable        # prepare object for delegation
#    printer.def_delegator "STDOUT", "puts"  # add delegation for STDOUT.puts()
#    printer.puts "Howdy!"
#
# Also, SingleForwardable can be used to set up delegation for a Class or Module.
#
#   class Implementation
#     def self.service
#       puts "serviced!"
#     end
#   end
#   
#   module Facade
#     extend SingleForwardable
#     def_delegator :Implementation, :service
#   end
#
#   Facade.service #=> serviced!
#   
# If you want to use both Forwardable and SingleForwardable, you can
# use methods def_instance_delegator and def_single_delegator, etc.
module SingleForwardable
  # Takes a hash as its argument.  The key is a symbol or an array of
  # symbols.  These symbols correspond to method names.  The value is
  # the accessor to which the methods will be delegated.
  #
  # :call-seq:
  #    delegate method => accessor
  #    delegate [method, method, ...] => accessor
  #
  def single_delegate(hash)
    hash.each{ |methods, accessor|
      methods = [methods] unless methods.respond_to?(:each)
      methods.each{ |method|
        def_single_delegator(accessor, method)
      }
    }
  end

#
  # Shortcut for defining multiple delegator methods, but with no
  # provision for using a different name.  The following two code
  # samples have the same effect:
  #
  #   def_delegators :@records, :size, :<<, :map
  #
  #   def_delegator :@records, :size
  #   def_delegator :@records, :<<
  #   def_delegator :@records, :map
  #
  def def_single_delegators(accessor, *methods)
    methods.delete("__send__")
    methods.delete("__id__")
    for method in methods
      def_single_delegator(accessor, method)
    end
  end

# :call-seq:
  #   def_single_delegator(accessor, method, new_name=method)
  #
  # Defines a method _method_ which delegates to _accessor_ (i.e. it calls
  # the method of the same name in _accessor_).  If _new_name_ is
  # provided, it is used as the name for the delegate method.
  def def_single_delegator(accessor, method, ali = method)
    str = %{
      def #{ali}(*args, &block)
        begin
          #{accessor}.__send__(:#{method}, *args, &block)
        rescue Exception
          $@.delete_if{|s| %r"#{Regexp.quote(__FILE__)}"o =~ s} unless Forwardable::debug
          ::Kernel::raise
        end
      end
    }

instance_eval(str, __FILE__, __LINE__)
  end

alias delegate single_delegate
  alias def_delegators def_single_delegators
  alias def_delegator def_single_delegator
end

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