Issue #12515 has been updated by Loren Segal.


edit: as a sidenote, adding a Boolean class to Ruby-core is unlikely to break any of the linked code, because Ruby is just defining an empty Boolean class. Existing libraries will just re-open the class as normal.

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Feature #12515: Create "Boolean" superclass of TrueClass / FalseClass
https://bugs.ruby-lang.org/issues/12515#change-59316

* Author: Loren Segal
* Status: Open
* Priority: Normal
* Assignee: 
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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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