From: "knu (Akinori MUSHA)" <noreply@...>
Date: 2021-09-13T04:03:43+00:00
Subject: [ruby-core:105216] [Ruby master Feature#14579] Hash value omission

Issue #14579 has been updated by knu (Akinori MUSHA).


We also discussed further with Matz and concluded that quoted keys (`{ "key": }`) are not allowed with or without interpolation.  This is simply because you don't need that when any local variable or constant can be written without quotation, and because it might make you feel it could possibly mean `{ "key": "key" }` and that would be confusing.

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Feature #14579: Hash value omission
https://bugs.ruby-lang.org/issues/14579#change-93623

* 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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