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Add Class#descendants

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Doesn't include receiver or singleton classes.

Implements [Feature #14394]

Co-authored-by: fatkodima <fatkodima123@gmail.com>
Co-authored-by: Benoit Daloze <eregontp@gmail.com>
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Jeremy Evans 2021-10-26 10:35:21 -09:00 • committed by GitHub
parent a4d5ee4f31
commit 717ab0bb2e
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Notes: git 2021-10-27 04:35:44 +09:00 
Merged: https://github.com/ruby/ruby/pull/4974

Merged-By: jeremyevans <code@jeremyevans.net>
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13
include/ruby/internal/intern/class.h
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@ -174,6 +174,19 @@ VALUE rb_mod_include_p(VALUE child, VALUE parent);
*/
VALUE rb_mod_ancestors(VALUE mod);
/**
* Queries the class's descendants. This routine gathers classes that are
* subclasses of the given class (or subclasses of those subclasses, etc.),
* returning an array of classes that have the given class as an ancestor.
* The returned array does not include the given class or singleton classes.
*
* @param[in] klass A class.
* @return An array of classes where `klass` is an ancestor.
*
* @internal
*/
VALUE rb_class_descendants(VALUE klass);
/**
* Generates an array of symbols, which are the list of method names defined in
* the passed class.