From: "Eregon (Benoit Daloze)" Date: 2021-10-28T11:31:10+00:00 Subject: [ruby-core:105849] [Ruby master Feature#18273] Class#subclasses Issue #18273 has been updated by Eregon (Benoit Daloze). +1 for Class#subclasses, I think it makes sense since we have Class#descendants. `Class#subclasses` is then also the "complement" of `Class#superclass`, just like `Class#descendants` is the complement of `Class#ancestors`. ---------------------------------------- Feature #18273: Class#subclasses https://bugs.ruby-lang.org/issues/18273#change-94388 * Author: byroot (Jean Boussier) * Status: Open * Priority: Normal ---------------------------------------- Ref: https://github.com/rails/rails/pull/43481 Something we forgot to mention in [Feature #14394], is either a parameter or another method to only get direct descendants. Active Support has been offering `Class.subclasses` as: ```ruby def subclasses descendants.select { |descendant| descendant.superclass == self } end ``` It seems a bit silly to grab all descendants and then restrict the list when `Class#descendants` had to do some recursion to get them all in the first place. ### Proposal We could either implement `Class#subclasses` directly, or accept a parameter in `Class#descendants`, e.g. `descendants(immediate = false)`. cc @eregon -- https://bugs.ruby-lang.org/ Unsubscribe: