Feature #14224: Boolean class

• Status: Rejected
• Assignee: -
• Target version: -

[sobrinho (Gabriel Sobrinho)]

Suggestion: TrueClass and FalseClass inheriting from Boolean (new superclass).

This would make true/false checking easier, like:

unless value.is_a?(Boolean)
  raise "Non-boolean value"
end

Currently we have to check for both classes:

unless value.is_a?(FalseClass) or value.is_a?(TrueClass)
  raise "Non-boolean value"
end

In high-level APIs this would be beneficial, for example in RSpec:

expect(value).to be_a Boolean

Currently, we have to check like this:

expect([TrueClass, FalseClass]).to include value.class

Or another similar workaround.

I would like to provide a patch if this is acceptable.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Rejected

This was already discussed and rejected in #12515.

[hsbt (Hiroshi SHIBATA)]

• Project changed from 14 to Ruby master

[byroot (Jean Boussier)]

• Related to Feature #20756: Introduce Boolean class added

[hsbt (Hiroshi SHIBATA)]

• Related to Feature #20882: Provide Boolean(...) added