[ruby-core:100414] [Ruby master Feature#17171] Why is the visibility of constants not affected by `private`?

Issue #17171 has been updated by marcandre (Marc-Andre Lafortune).


So can we envision issuing a warning for two release cycles?

Is it feasible to issue a warning for constants that are currently public that would be made private this way?

Difficult being that call to `private_constant` happens after point of definition:

```ruby
class Foo
  private
  X = 42
end # => Warn about privacy change

class Bar
  private
  X = 42
  private_constant :X
end # => No warning
```


----------------------------------------
Feature #17171: Why is the visibility of constants not affected by `private`?
https://bugs.ruby-lang.org/issues/17171#change-88029

* Author: marcandre (Marc-Andre Lafortune)
* Status: Open
* Priority: Normal
----------------------------------------
```ruby
class Foo
  def call_me
    # ...
  end

  private
 
  SOME_DATA = %i[...].freeze  # is public, why not private?

  def calc_stuff  # is private, ok.
    # ...
  end
end
```ruby

It's probably a naive question, but why shouldn't `SOME_DATA`'s visibility be private?

When writing gems, more often than not the constants that I write are not meant for public consumption. I find it redundant (and tiresome) to explicitly write `private_constant :SOME_DATA`.



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