[ruby-core:114453] [Ruby master Feature#14579] Hash value omission

Issue #14579 has been updated by olivierlacan (Olivier Lacan).


Has it been considered to ever expand this feature to allow instance variables and global variables. Or was it strictly reserved for local variables intentionally, to avoid incompatible or dangerous behavior? 

Thanks for adding this regardless, it's a wonderful feature.

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Feature #14579: Hash value omission
https://bugs.ruby-lang.org/issues/14579#change-104215

* Author: shugo (Shugo Maeda)
* Status: Closed
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
How about to allow value omission in Hash literals:

```ruby
x = 1
y = 2
h = {x:, y:}
p h #=> {:x=>1, :y=>2}
```

And in keyword arguments:

```ruby
def login(username: ENV["USER"], password:)
  p(username:, password:)
end

login(password: "xxx") #=> {:username=>"shugo", :password=>"xxx"}
```


---Files--------------------------------
hash_value_omission.diff (619 Bytes)


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