[ruby-core:109859] [Ruby master Feature#19002] Explicit splat for enumerator kwarg blocks

["inopinatus (Joshua GOODALL)" <noreply@ruby-lang.org>]

Issue #19002 has been updated by inopinatus (Joshua GOODALL).


I also had

``` ruby
module Enumerable
  def **(proc) = each { |arg| proc[**arg] }
end

ary.map ** ->(foo:, bar:) { foo+bar } #=> [143, 222]
```

which is kinda fun, but not so readable.


----------------------------------------
Feature #19002: Explicit splat for enumerator kwarg blocks
https://bugs.ruby-lang.org/issues/19002#change-99097

* Author: inopinatus (Joshua GOODALL)
* Status: Open
* Priority: Normal
----------------------------------------
I'm renovating some 2.x-era code that relied heavily on autosplat for block kwargs. As we all know, this throws an ArgumentError in Ruby 3:

``` ruby
ary = [
  { foo: 42, bar: 101 },
  { foo: 99, bar: 123 }
]

ary.map { |foo:, bar:| foo+bar } #=> ArgumentError
```

The nicest solution I could find so far is

``` ruby
module Enumerable
  def splat
    each { |arg| yield **arg }
  end
end
```

and then

``` ruby
ary.map.splat { |foo:, bar:| foo+bar } #=> [143, 222]
```

and I present this as a feature suggestion.




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