Issue #14394 has been updated by fatkodima (Dima Fatko).


While I needed `Class#descendants` many times, I never had a need for `Module#descendants`. But I can think of its usefulness.
For example, when inheritance is implemented through modules, but not classes, for example -

a quick search guided me to this: https://github.com/mongodb/mongoid/blob/55e4f8367f3878fbf1aafeef6b6e40b39567f917/lib/mongoid/document.rb#L34-L36
In this case, this implementation would benefit from `Module#descendants`. 

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Feature #14394: Class.descendants
https://bugs.ruby-lang.org/issues/14394#change-87728

* Author: ridiculous (Ryan Buckley)
* Status: Feedback
* Priority: Normal
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There have been numerous implementations of the method Class.descendants by various gems. However, I can't help but think that this ability should be included in the Ruby language itself. Especially since Ruby already offers the counterpart method Class.ancestors.

Would it possible to add a `descendants` class method?



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