Issue #12515 has been updated by Samuel Williams.


It's also interesting to note, so many people are working around this:

Searching on github for:

"is_a? TrueClass FalseClass" gives 90,000 results.

https://github.com/search?p=2&q=is_a%3F+TrueClass&ref=searchresults&type=Code&utf8=

"module Boolean TrueClass FalseClass" gives 63,000 results.

https://github.com/search?utf8=&q=module+Boolean+TrueClass+FalseClass&type=Code&ref=searchresults

Even I'm surprised by the number of people working around this issue!

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Feature #12515: Create "Boolean" superclass of TrueClass / FalseClass
https://bugs.ruby-lang.org/issues/12515#change-61129

* Author: Loren Segal
* Status: Rejected
* 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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