As Yusuke Endoh said, I'd expect this notation to create a Set, not a Hash...

-----
Carlos Agarie
+55 11 97320-3878 | @carlos_agarie


2015-04-29 23:55 GMT-03:00  <shugo / ruby-lang.org>:
> Issue #11105 has been updated by Shugo Maeda.
>
>
> Yusuke Endoh wrote:
>> {x, y} is a conventional notation of a mathematical set.
>> When I read it, I expect it to be equivalent to { x => true, y => true }.
>
> {x, y} looks like a set of variable bindings, so it's reasonable that each key is a variable name and each value is its value.
>
>
> ----------------------------------------
> Feature #11105: ES6-like hash literals
> https://bugs.ruby-lang.org/issues/11105#change-52285
>
> * Author: Shugo Maeda
> * Status: Open
> * Priority: Normal
> * Assignee:
> ----------------------------------------
> Why not support ECMAScript6-like hash literals?
>
> For example,
>
>     {x, y}
>
> is equivalent to:
>
>     {x: x, y: y}
>
> For convenience, the prefix of global, instance, and class variables should be removed from the key name as follows:
>
>     a = 1
>     B = 2
>     $c = 3
>     @d = 4
>     @@e = 5
>     p({a, B, $c, @d, @@e, f: 6})
>     #=> {:a=>1, :B=>2, :c=>3, :d=>4, :e=>5, :f=>6}
>
>
> ---Files--------------------------------
> 0001-support-ES6-like-hash-literals.patch (3.88 KB)
>
>
> --
> https://bugs.ruby-lang.org/