Issue #12515 has been updated by Shyouhei Urabe.


Loren Segal wrote:
> should be back compat unless someone already has a "Boolean" class at toplevel out there.

You failed here.

https://github.com/search?l=ruby&q=%22class Boolean%22&type=Code
https://rubygems.org/search?query=Boolean

I guess it's too late.

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Feature #12515: Create "Boolean" superclass of TrueClass / FalseClass
https://bugs.ruby-lang.org/issues/12515#change-59313

* Author: Loren Segal
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
Since Ruby 2.4 is unifying Bignum/Fixnum into Integer (https://bugs.ruby-lang.org/issues/12005), it seems reasonable to do something similar for TrueClass / FalseClass, and create a proper Boolean hierarchy. The implementation would be fairly straightforward and should be back compat unless someone already has a "Boolean" class at toplevel out there.

Given the compatibility implications of Integer, this Boolean proposal is even less intrusive.

Sample implementation:

~~~
class Boolean < BasicObject; end
class TrueClass < Boolean; end
class FalseClass < Boolean; end
~~~




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