lvalue forwarding struct?

[Chad J]

What I am looking for is a templated struct that simply wraps a 
variable, and ensures lvalueness is preserved for that variable.
Ex:

foo(bar) *= 9;

In this case foo is to be a function that acts on bar, and then makes 
sure that bar has the *= 9; applied to it.

It might look like this:

int foo(inout int input)
{
   input++;
   return lvalue(input);
/* lvalue(...) is an opCall constructor for the lvalue templated 
forwarding struct.  */
}

Thus we could write

int bar = 3;
foo(bar) *= 9;
printf( "%d", bar ); // prints 36

One possible use case would be as a hack to get around certain 
shortcomings of properties for the time being.

So does anyone have such a thing that they want to share?
Otherwise this is something I might do.