From: "shugo (Shugo Maeda)" <noreply@...>
Date: 2022-12-04T22:48:14+00:00
Subject: [ruby-dev:52011]  [Ruby master Feature#19134] ** is not allowed in def foo(...)

Issue #19134 has been updated by shugo (Shugo Maeda).


Eregon (Benoit Daloze) wrote in #note-5:
> IMHO if `...` is used then `*`, `**` and `&` should all be forbidden (a SyntaxError at parse time).
> Because that way is the best for optimizing delegation.
> And also taking apart `*` and `**` is arguably not really delegation anymore.

`&` is allowed in 3.1, so it's a breaking change to prohibit it.

----------------------------------------
Feature #19134: ** is not allowed in def foo(...)
https://bugs.ruby-lang.org/issues/19134#change-100493

* Author: shugo (Shugo Maeda)
* Status: Closed
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
`*` and `&` are allowed in the body of a method with `...` argument forwarding, but `**` is not allowed.

```
def foo(...)
  bar(*) # OK
  baz(&) # OK
  quux(**) # NG
end
```

Is it intended behavior?

It seems that parse.y has code like `#ifdef RUBY3_KEYWORDS`, and if RUBY3_KEYWORDS, `**` will also be supported.




-- 
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