DIPX: Enum Literals / Implicit Selector Expression

[ryuukk_]

> Not saying I'm against the feature, I just don't understand why 
> `auto color = Color.orange` is a problem and how `Color color = 
> .orange` is better. Because of four fewer characters?

Indeed, this example doesn't make much sense, but the ony i 
posted on the github shows exactly why we need it


```
set_my_flag( MySuperLongName.MyFlagA |  MySuperLongName.MyFlagB | 
MySuperLongName.MyFlagC | MySuperLongName.MyFlagD | 
MySuperLongName.MyFlagE | MySuperLongName.MyFlagF );
```

vs

```
set_my_flag( .MyFlagA |  .MyFlagB | .MyFlagC | .MyFlagD | 
.MyFlagE | .MyFlagF );
```

One could argue to use ``with``

But what about places where it can't be used? and it is counter 
productive, if the goal is to remove repetition, why introduce 
more?

It already is explicit, and checked with the type system

I suggest trying languages that have that feature and see how 
practical, and just better enums feel to use

I see myself still relying on constants to emulate enums...  in 
D, because of that, that's not good