What is the meaning of @future ?

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On Friday, 17 September 2021 at 10:31:34 UTC, bauss wrote:
> On Thursday, 16 September 2021 at 20:53:34 UTC, Elmar wrote:
>> Hello D community.
>>
>> I was browsing the `__traits` keywords and I found `isFuture` 
>> whose descriptions says something about `@future`-annotated 
>> variables.
>>
>> [link](https://dlang.org/spec/traits.html#isFuture)
>>
>> I didn't find anything about `@future` for the D programming 
>> language. I only found that this annotation is used in Apex to 
>> denote futures (a.k.a. promises) as programming concept.
>>
>> Is this something which exists, existed, was abandoned early 
>> as an idea? I remember I had read that D uses a "fiber" 
>> library to provide coroutines and such.
>>
>> Maybe somebody knows an answer for this.
>
> It's just another "useless" attribute that the language has 
> added before fixing any of the real problems :)
>
> Basically it reserves a symbol for the future.
>
> It's similar to creating ex. an empty function that throws an 
> error or something like "Not implemented"
>
> While I understand why it was added and what purpose it serves 
> then I fail to see why that  was prioritized over actual issues.
>
> It's solving an almost non-existing issue.

I think the main reason it was added is because Sociomantic asked 
for it, but they are of course not around anymore.