Code shared from run.dlang.io.

main.d

import std;

void outofcontext()
{
    writeln("Hello D ", associative);
    foreach (pointeraddress, information; associative)
    {
        writeln(*cast(string*)pointeraddress);
    }

}

static string[void*] associative;

void main()
{
    writeln("Hello D ", associative);

    string variable = "hi";
    associative[&variable] = "someinformation";

    outofcontext();
}