Associate information with a pointer address.

[BoQsc]

After being very happy about associative arrays of D Language, I 
encountered that they are not `@nogc`friendly. Unsure if I should 
wait for D language to support it, or do I need to rethink 
everything.

Error
```
onlineapp.d(20): Error: assigning an associative array element in 
`@nogc` function `D main` may cause a GC allocation
```

Source Code
```
import std;

void outofcontext() @nogc @system
{
     printf("Hello D ", associative);
     foreach (pointeraddress, information; associative){
		
        printf("%i", *cast(int *)pointeraddress);
     }

}

static string[void*] associative;

void main() @nogc @system
{
     printf("Hello D ", associative);

     int variable = 6;
     associative[&variable] = "someinformation";

     outofcontext();
}

```