From: "zverok (Victor Shepelev) via ruby-core" <ruby-core@...>
Date: 2024-07-23T14:38:56+00:00
Subject: [ruby-core:118671] [Ruby master Bug#20647] Invalid return in class/module body from within singleton class

Issue #20647 has been updated by zverok (Victor Shepelev).


That���s actually interesting, because return in the middle of the class body, while might be considered questionable, is also meaningful.

I think making it a syntax error in normal classes was (probably?) a decision from before 2.4 (when top-level `return` had no useful semantics).

I can imagine code like
```ruby
class MyService
  # some generic stuff

  return if RUBY_PLATFORM.match?(/windows/i)

  # some Unix-only stuff
end
```

...and even more so, the same in the middle of a singleton class definition in some DSL method :shrug:

----------------------------------------
Bug #20647: Invalid return in class/module body from within singleton class
https://bugs.ruby-lang.org/issues/20647#change-109203

* Author: kddnewton (Kevin Newton)
* Status: Open
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
Currently, Ruby will raise a syntax error for invalid returns within class and module bodies, but skips it for singleton classes. I think we should be able to add this same error for singleton classes, as I believe these always raise a LocalJumpError.

```ruby
class << Object
  return
end
```



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