[Suggestion] New syntax for dynamic key in hash

[MatrixFr]

Hi,

I discover a problem in Javascript this morning: if i want a hash with dynamic key.

In PHP for exemple, no problem:

$test = [
   $foo => 42,
   Klass::myConst => 44
];

What I wish do in coffee :

class myClass
  @MY_CONST1 = 42
  @MY_CONST2 = 422
  @MY_ASSOC_CONST = {
     @MY_CONST1: 'baz'
     @MY_CONST2: 'test'
  }

What I have to do for this time:

class myClass
  @MY_CONST = 42
  @MY_ASSOC_CONST = {}
  @MY_ASSOC_CONST[@MY_CONST] = 'baz'

So maybe we can choose a symbol to say "it's a dynamic key in this hash, compile that!" like simply:

class myClass
  @MY_CONST = 42
  @MY_ASSOC_CONST = {
     'foo': 'bar'
     @MY_CONST:: 'baz'
  }

when use "::" separator in hash, it will compile it in 2 times :

this.MY_ASSOC_CONST = {
  'foo': 'bar'
};
this.MY_ASSOC_CONST[this.MY_CONST] = 'baz';

What do you think about that?

[vendethiel]

Duplicate of #3597.

[MatrixFr]

What they said in other topic it's to use the "manual solution", what I used now.
But I propose new syntaxic sugar to simplify our life about this problem. ^^