[ruby-core:97153] [Ruby master Feature#15236] add support for hash shorthand

Issue #15236 has been updated by nobu (Nobuyoshi Nakada).


joallard (Jonathan Allard) wrote in #note-20:
> ```ruby
> User.new({id, age, name, registered_at})
> ```

Note that you will have to put `**` between the parenthesis and brace now.

```ruby
User.new(**{id, age, name, registered_at})
```


----------------------------------------
Feature #15236: add support for hash shorthand
https://bugs.ruby-lang.org/issues/15236#change-84256

* Author: ignatiusreza (Ignatius Reza Lesmana)
* Status: Rejected
* Priority: Normal
----------------------------------------
PR in github: https://github.com/ruby/ruby/pull/1990

inspired by javascript support for object literal shorthand notation `{ a }`, which will be expanded into `{ a: a }`..

to avoid ambiguity, this shorthand is only supported when hash is defined with `{ }` notation.. in other situation where the brackets is optional, e.g. function call, we still need to write it in full (`m(a : a)` instead of `m(a)`, or `m(a, b, c: c)` instead of `m(a, b, c)`..



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