[ruby-core:100125] [Ruby master Feature#14394] Class.descendants

Issue #14394 has been updated by ko1 (Koichi Sasada).


let's clear:

* `self` should be is contained or not? AS's method doesn't contain.
* singleton classes should be excluded.
* order is random (not specified).
* performance of this method is not important, or important (calls it many times)?


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Feature #14394: Class.descendants
https://bugs.ruby-lang.org/issues/14394#change-87693

* 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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