From: "ioquatix (Samuel Williams) via ruby-core" <ruby-core@...>
Date: 2023-02-25T11:34:31+00:00
Subject: [ruby-core:112601] [Ruby master Feature#19450] Is there an official way to set a class name without setting a constant?

Issue #19450 has been updated by ioquatix (Samuel Williams).


> 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.

It's already the case that `Module#name` can return a string which is not how you access that module (or class). Rails already does that for ActiveRecord models. Anyone can override that method, so I don't see how that's relevant.

Also, the proposed implementation does not change the behaviour of permanent names, so it does not break non-anonymous classes.

```ruby
x = Class.new(Object, "foo")
x.name # => "foo"
X = x
x.name # => "X"
```

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

I basically disagree with this. `Object.const_set` to assign a name to what should otherwise be anonymous modules, is a hack. The proposed PR provides a mechanism to give anonymous modules and classes a name, and there are literally hundreds of examples of people trying to achieve 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-102048

* 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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