Ruby | Module | private_method_defined?

概要

Module#private_method_defined?(name) -> bool

詳細

インスタンスメソッド name がモジュールに定義されており、 しかもその可視性が private であるときに true を返却。
そうでなければ false を返却。

サンプルコード

require 'tbpgr_utils'

module Hogeable
  def hogeable
  end

  private

  def private_hogeable
  end
end

class Hoge
  include Hogeable
  def hoge
    print 'hoge'
  end

  private

  def private_hoge
  end
end

class ChildHoge < Hoge
end

bulk_puts_eval binding, <<-EOS
Hoge.private_method_defined? :hogeable
Hoge.private_method_defined? :private_hogeable
Hoge.private_method_defined? :hoge
Hoge.private_method_defined? :private_hoge
Hoge.private_method_defined? 'private_hoge'
ChildHoge.private_method_defined? :private_hogeable
ChildHoge.private_method_defined? :private_hoge
Hogeable.private_method_defined? :private_hogeable
EOS

__END__
下記はTbpgrUtils gemの機能
bulk_puts_eval

https://rubygems.org/gems/tbpgr_utils
https://github.com/tbpgr/tbpgr_utils

出力

出力

Hoge.private_method_defined? :hogeable              # => false
Hoge.private_method_defined? :private_hogeable      # => true
Hoge.private_method_defined? :hoge                  # => false
Hoge.private_method_defined? :private_hoge          # => true
Hoge.private_method_defined? 'private_hoge'         # => true
ChildHoge.private_method_defined? :private_hogeable # => true
ChildHoge.private_method_defined? :private_hoge     # => true
Hogeable.private_method_defined? :private_hogeable  # => true

参照

http://docs.ruby-lang.org/ja/2.0.0/method/Module/i/private_method_defined=3f.html