D hackers requested. Dancing around postblit.

[IgorStepanov via Digitalmars-d]

FYI:
My second try:

void emplace(V1)(ref V1 dst, ref V1 src) @trusted if (is(V1 == 
struct))
{
     static if (new_obj)
     {
         V1 tmp = cast(V1)src; //create copy and call postblit
         static V1 init = V1.init;
         //bitwise copy of object, which already postblitted
         (cast(void*)&dst)[0 .. V1.sizeof] = (cast(void*)&tmp)[0 
.. V1.sizeof];

         //initialize tmp with V1.init.
         (cast(void*)&tmp)[0 .. V1.sizeof] = (cast(void*)&init)[0 
.. V1.sizeof];
     }
}

This method do one extra dtor call for tmp, but it may be trivial 
because tmp is V.init.
However it is not a complete solution of the task.