[ruby-core:105826] [Ruby master Feature#18273] Class.subclasses
From:
"byroot (Jean Boussier)" <noreply@...>
Date:
2021-10-27 13:27:28 UTC
List:
ruby-core #105826
Issue #18273 has been reported by byroot (Jean Boussier).
----------------------------------------
Feature #18273: Class.subclasses
https://bugs.ruby-lang.org/issues/18273
* 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: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>