[ruby-core:106759] [Ruby master Feature#14394] Class.descendants

Issue #14394 has been updated by matz (Yukihiro Matsumoto).


Sorry for the last minute change. The biggest reason is that we still have several options, so I didn't want to restrict the future possibility.
For example, `Class#descendants` can either:

* behave as it was first introduced. `Module#descentands` may or may not be introduced.
* be undefined for classes (to be reserved for module hierarchy), just like `Class#include`
* not be introduced along with `Module#descendants`.

I am open to discussion but I don't want to jump on the conclusion.

Matz.


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Feature #14394: Class.descendants
https://bugs.ruby-lang.org/issues/14394#change-95463

* Author: ridiculous (Ryan Buckley)
* Status: Open
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
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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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