[ruby-core:112600] [Ruby master Feature#19450] Is there an official way to set a class name without setting a constant?

Issue #19450 has been updated by Eregon (Benoit Daloze).


> I'm also pretty sure assigning to a constant is incompatible with Ractor in some cases..

No, modules and classes are always shared between Ractors. Assigning to a constant needs to be in the main Ractor but so does loading any code anyway.

> My web framework utopia loads controllers into anonymous modules and classes (for live reloading they are not assigned globally) and I want to give them better names.

I suppose they share the outer module then?
Then the names already look like `#<Module:0x00007f416ffb7950>::C`, no?
That's good enough IMO and a good representation of what is being done.

---

The fundamental thing here is `Module#name` must return a String which is how to access that module, unless some part is anonymous and then of course it cannot be accessed via a constant path.
This feature would break that, and I think no feature is worth breaking that.

----------------------------------------
Feature #19450: Is there an official way to set a class name without setting a constant?
https://bugs.ruby-lang.org/issues/19450#change-102047

* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
----------------------------------------
This is the best I could come up with:

```ruby
klass = Class.new

Object.const_set("Klass", klass)
Object.send(:remove_const, "Klass")

puts klass.new
# => #<Klass:0x0000000100a9d688>
```

Can we do better?

What about something like:

```ruby
Class.new(name: "Klass")
```

or

```ruby
Class.new do
  def self.name
    "Klass"
  end
end
```

etc



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