From: "ioquatix (Samuel Williams) via ruby-core" <ruby-core@...>
Date: 2023-03-02T00:57:36+00:00
Subject: [ruby-core:112653] [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).


> I haven't yet seen a non-contrived example where overriding name will not work

Any time you have nested class or modules in an anonymous module, it gets very ugly.

> Examples with invalid constant names already show how this feature could easily be abused.

Already a possible attack surface as demonstrated.

> due to how rarely this feature is needed

Since this feature doesn't exist yet, I don't think you can argue that it's rarely used.

As stated above, it's used over 100 times in Ruby's own test suite. Other anecdotal evidence suggests this is a fairly common issue as there are a variety of blog posts and SO answers about various ways to achieve it (i.e. overriding `#name`). I've enumerated several key places where I wished this interface existed.

I don't see why "rarity of usage" (which is yet to be proven) is a strong argument for "bespoke method names". Can you explain why those two things are related? Are you concerned something is going to break?

----------------------------------------
Feature #19450: Is there an official way to set a class name without setting a constant?
https://bugs.ruby-lang.org/issues/19450#change-102101

* 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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