From: "knu (Akinori MUSHA)" <noreply@...>
Date: 2021-09-16T09:22:46+00:00
Subject: [ruby-core:105293] [Ruby master Feature#14579] Hash value omission

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


...Which is that `{ symbol: }` verbosely means `{ symbol: binding.local_variable_defined?(:symbol) ? binding.local_variable_get(:symbol) : __send__(:symbol) }` with no exception, no matter if the symbol is `if`, `self`, `fork` or `return` or whatever.

----------------------------------------
Feature #14579: Hash value omission
https://bugs.ruby-lang.org/issues/14579#change-93702

* 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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