lambda function with "capture by value"

[Simon Bürger via Digitalmars-d-learn]

If a lambda function uses a local variable, that variable is 
captured using a hidden this-pointer. But this capturing is 
always by reference. Example:

    int i = 1;
    auto dg = (){ writefln("%s", i); };
    i = 2;
    dg(); // prints '2'
Is there a way to make the delegate "capture by value" so that 
the call prints '1'?

Note that in C++, both variants are available using
   [&]() { printf("%d", i); }
and
   [=]() { printf("%d", i); }
respectively.