如何获得所有定义的类? [英] How can I get all defined classes?

问题描述

有没有办法获取所有已定义类的列表.我正在寻找这样的代码:

Is there a way to get the list of all defined classes. I'm looking for a code like this:

Class.instances.each do |klass|
  puts klass.name
end

如果没有办法做到这一点.是否可以定义一个类 A 以便在其中注册其后代?比如这样:

If there is no way to do this. It is possible to define a class A such that its descendants are registered in it? For example in this way:

class A
  ...
end

class B < A
end

class C < B
end

A.descendants   # => [B, C] 

推荐答案

p ObjectSpace.each_object(Class){|ob| p ob}

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