Ruby 2.0如何在包含模块后将其从模块中取消包含? [英] Ruby 2.0 How do I uninclude a module out from a module after including it?

问题描述

module X
end

module Y
end

module Z
  #TODO include X replacement of including Y
  #TODO include Y replacement of including X
end

有没有一种方法可以解决ruby不包含uninclude关键字的事实?

Is there a way to work around the fact that ruby contains no uninclude keyword??

推荐答案

如果您确实需要这种功能，则可以使用

If you really need this kind of functionality, you could probably do it by using refinements.

class Foo
end

module X
  def x
    puts 'x'
  end
end

module Y
end

module R
  refine Foo do
    include X
    include Y
  end
end

# In a separate file or class
using R
# Foo now includes X and Y
Foo.new.x

# In a different file or class
# Foo no longer includes X and Y
Foo.new.x # NoMethodError

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