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Showing content from https://github.com/rubocop/rubocop/issues/14333 below:

The `Naming/PredicateMethod` cop ignores implicit nil return. · Issue #14333 · rubocop/rubocop · GitHub

A method that returns true, false and implicit nil is flagged as a predicate method.

def foo
  case @foo
  when "bar" then true
  when "baz" then false
  end
end

Changing the method body to an explicit nil return fixes the offence.

def foo
  case @foo
  when "bar" then true
  when "baz" then false
  else nil
  end
end

But raises the Style/EmptyElse offence.

My expectation is there for the foo not to cause the Naming/PredicateMethod offence. This is a conversion method that, for certain values, returns a boolean value.

The foo method causes the Naming/PredicateMethod offence despite not being a predicate method.

Please see the description.

$ [bundle exec] rubocop -V
1.77.0 (using Parser 3.3.8.0, rubocop-ast 1.45.1, analyzing as Ruby 3.4, running on ruby 3.4.2)

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