module SingleForwardable

Usage of The SingleForwardable is like Fowadable module.

Public Instance Methods

def_delegator(accessor, method, ali = method)
def_delegators(accessor, *methods)
def_single_delegator(accessor, method, ali = method) click to toggle source

Defines a method method which delegates to obj (i.e. it calls the method of the same name in obj). If new_name is provided, it is used as the name for the delegate method.

# File rake/lib/forwardable.rb, line 267
def def_single_delegator(accessor, method, ali = method)
  str = %Q{
    def #{ali}(*args, &block)
        #{accessor}.__send__(:#{method}, *args, &block)
      rescue Exception
        $@.delete_if{|s| %r"#{Regexp.quote(__FILE__)}"o =~ s} unless Forwardable::debug

  instance_eval(str, __FILE__, __LINE__)
Also aliased as: def_delegator
def_single_delegators(accessor, *methods) click to toggle source

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
# File rake/lib/forwardable.rb, line 254
def def_single_delegators(accessor, *methods)
  for method in methods
    def_single_delegator(accessor, method)
Also aliased as: def_delegators
Alias for: single_delegate
delegate method → accessor click to toggle source
delegate [method, method, ...] → accessor

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.

# File rake/lib/forwardable.rb, line 234
def single_delegate(hash)
  hash.each{ |methods, accessor|
    methods = [methods] unless methods.respond_to?(:each)
    methods.each{ |method|
      def_single_delegator(accessor, method)
Also aliased as: delegate