[ruby-dev:52101] [Ruby master Bug#20675] Parse error with required kwargs and omitted parens

["bkuhlmann (Brooke Kuhlmann) via ruby-dev" <ruby-dev@ml.ruby-lang.org>]

Issue #20675 has been updated by bkuhlmann (Brooke Kuhlmann).


I think this would be *great* and would *love* to use keyword parameters without parenthesis...but I don't know how complicated this would be for the parser (including backwards compatibility which Jeremy (Evans) has mentioned before). If this were made possible -- there is an upside -- as anonymous blocks would also benefit from this support as this is not valid syntax (currently):

``` ruby
def demo positional, &block
  other positional, &block
end
```

💡 For more on this, see [Issue 18441](https://bugs.ruby-lang.org/issues/18441).

----------------------------------------
Bug #20675: Parse error with required kwargs and omitted parens
https://bugs.ruby-lang.org/issues/20675#change-109405

* Author: matz (Yukihiro Matsumoto)
* Status: Open
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
As pointed out in https://github.com/mruby/mruby/issues/6268, keyword arguments without surrounding parens are a bit confusing, e.g.

```ruby
def foo arg:
  123
end
```

is parsed as

```ruby
def foo(arg:)
  123
end
```

where

```ruby
k=25
f k:
    10
```

is parserd as

```ruby
k=25
f(k: 10)
```

In summary, should we ignore newlines after keyword labels? Should we make them behave consistent?

Matz.




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