[ruby-core:75668] [Ruby trunk Bug#12412] Extend safe navigation operator

Issue #12412 has been updated by Daniel Ferreira.


Relates to: 
* https://bugs.ruby-lang.org/issues/11537
* https://bugs.ruby-lang.org/issues/12263

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Bug #12412: Extend safe navigation operator
https://bugs.ruby-lang.org/issues/12412#change-58798

* Author: Daniel Ferreira
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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I wonder if we couldn't extend the safe navigation operator to work with any object rather than just nil.

I tend to do a lot of code like this:

~~~ ruby
class Foo
   def bar(baz)
       if baz.respond_to?(:qux)
          return baz.qux
       end
       'whatever'
   end
end
~~~

What if we extend the safe navigation operator to work with any kind of object?
If it doesn't respond to the method it would return nil like this:

~~~ ruby
class Foo
  def bar(baz)
    baz&.qux || 'whatever'
  end
end
~~~



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