[ruby-core:97129] [Ruby master Feature#15236] add support for hash shorthand

Issue #15236 has been updated by joallard (Jonathan Allard).


I support this proposal in its simplest form. I do not think changing method argument syntax is a good idea.

@osyo above makes a good point, if your variables are well named:

```
User.new(id: id, age: age, name: name, registered_at: registered_at)
```

It is rewarding to have a shorter, clear syntax:

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

I do not see a reason to reject this. I would strongly encourage re-opening.

----------------------------------------
Feature #15236: add support for hash shorthand
https://bugs.ruby-lang.org/issues/15236#change-84233

* 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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